Preface to the Second Edition |
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xiii | |
Preface to the First Edition |
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xv | |
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1 | (8) |
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1.1 Terms and Definitions |
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1 | (5) |
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1 | (4) |
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5 | (1) |
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1.1.3 Seismological Terms |
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6 | (1) |
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6 | (3) |
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7 | (2) |
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2 Seismicity at Volcanoes |
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9 | (20) |
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2.1 History of Seismic Monitoring of Volcanic Activity |
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9 | (5) |
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2.2 Classification of Volcanic Earthquakes |
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14 | (6) |
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2.3 Sequences of Volcanic Earthquakes |
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20 | (9) |
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2.3.1 Sequences of Volcano-Tectonic Earthquakes |
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20 | (7) |
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2.3.2 Sequences of Eruption Earthquakes |
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27 | (2) |
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3 Fundamentals of Volcanic Seismology |
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29 | (20) |
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3.1 Magma Flow within the Volcanic Conduit |
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29 | (3) |
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30 | (1) |
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3.1.2 Modeling of Magma Flow Regimes |
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31 | (1) |
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3.2 Experimental Studies of the Volcanic Processes and Their Applications for the Seismic Sources |
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32 | (9) |
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3.2.1 Experimental Grounds of the Brittle Fracturing in the Rocks at High Temperatures and High Pressure |
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32 | (3) |
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3.2.2 Experimental Grounds of the Origin of Seismic Signals During the Magma Ascending Within the Volcanic Conduit |
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35 | (6) |
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3.3 General Description of the Source of Seismic Signals at Volcanoes |
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41 | (8) |
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3.3.1 Equivalent Force System Acting in the Earthquake Source |
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41 | (1) |
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41 | (1) |
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41 | (1) |
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3.3.4 Seismic Moment Tensor |
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42 | (1) |
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43 | (6) |
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4 Origin of Volcano-Tectonic Earthquakes |
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49 | (18) |
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4.1 Migration of Magma and Its Seismic Potential |
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49 | (4) |
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4.2 Volcanism and Tectonics |
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53 | (6) |
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4.3 Source Nature of Volcano-Tectonic Earthquakes |
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59 | (4) |
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4.3.1 Waveform and Spectra |
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59 | (2) |
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4.3.2 Tensor Representation of the Source of Volcano-Tectonic Earthquake |
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61 | (2) |
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4.4 Models of Volcano-Tectonic Earthquake Sequences |
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63 | (4) |
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5 Volcano-Tectonic Earthquakes at Basaltic Volcanoes: Case Studies |
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67 | (32) |
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5.1 Volcano-Tectonic Earthquakes Associated with Shield Volcanoes |
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67 | (4) |
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5.1.1 Kilauea Volcano, Hawaii |
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67 | (4) |
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5.2 Volcano-Tectonic Earthquakes Associated with Stratovolcanoes |
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71 | (11) |
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71 | (7) |
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5.2.2 Oshima Volcano, Izu Islands |
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78 | (1) |
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5.2.3 Klyuchevskoy Volcano, Kamchatka |
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79 | (3) |
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5.3 Volcano-Tectonic Earthquakes Associated with Fissure Eruptions |
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82 | (8) |
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5.3.1 New Tolbachik Volcanoes, Kamchatka |
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83 | (3) |
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5.3.2 The 2005-2009 Ethiopia Rifting Episode |
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86 | (4) |
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5.4 Volcano-Tectonic Earthquakes Associated with Caldera Collapse |
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90 | (2) |
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5.4.1 Fernandina Volcano, Galapagos Islands |
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90 | (2) |
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5.5 Volcano-Tectonic Earthquakes Associated with Submarine Eruptions |
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92 | (7) |
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5.5.1 Teishi Knoll Volcano, Izu Islands |
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92 | (2) |
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5.5.2 Miyakejima Volcano, Izu Islands |
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94 | (5) |
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6 Volcano-Tectonic Earthquakes at Andesitic Volcanoes: Case Studies |
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99 | (22) |
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6.1 Volcano-Tectonic Earthquakes Associated with Volcanic "Directed Blasts" |
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99 | (6) |
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6.1.1 Bezymianny Volcano, Kamchatka |
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100 | (1) |
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6.1.2 Sheveluch Volcano, Kamchatka |
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101 | (4) |
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6.2 Volcano-Tectonic Earthquakes Associated with Phreatic and Phreato-Magmatic Explosions |
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105 | (10) |
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6.2.1 El Chichon Volcano, Mexico |
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105 | (1) |
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6.2.2 Volcan de Colima, Mexico |
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105 | (2) |
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6.2.3 Popocatepetl Volcano, Mexico |
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107 | (4) |
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6.2.4 Soufriere Hills Volcano, Montserrat |
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111 | (4) |
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6.3 Volcano-Tectonic Earthquakes Associated with Lava Extrusions |
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115 | (4) |
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6.3.1 Volcan de Colima, Mexico |
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115 | (4) |
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6.4 Volcano-Tectonic Earthquakes Associated with Flank Eruptions |
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119 | (2) |
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6.4.1 Sakurajima Volcano, Japan |
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119 | (2) |
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7 Volcano-Tectonic Earthquakes at Dacitic Volcanoes: Case Studies |
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121 | (24) |
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7.1 Volcano-Tectonic Earthquakes Associated with Summit Eruptions |
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121 | (15) |
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7.1.1 Mount St. Helens, Cascades |
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121 | (6) |
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7.1.2 Usu Volcano, Hokkaido |
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127 | (2) |
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7.1.3 Unzen Volcano, Kyushu |
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129 | (3) |
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7.1.4 Pinatubo Volcano, Luzon |
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132 | (4) |
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7.2 Volcano-Tectonic Earthquakes Associated with Flank Eruptions |
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136 | (9) |
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7.2.1 Usu Volcano, Hokkaido |
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137 | (8) |
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8 General Properties of Volcano-Tectonic Earthquake Swarms |
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145 | (16) |
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8.1 Properties of Volcano-Tectonic Earthquake Swarms Inferred from the Data of Chapters 5-7 |
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145 | (5) |
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8.1.1 Temporal Variations |
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145 | (3) |
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8.1.2 Spatial Distributions |
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148 | (1) |
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8.1.3 Posteruption Seismic Activity |
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149 | (1) |
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8.1.4 Duration of Seismic Swarms Prior to Eruption |
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150 | (1) |
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8.1.5 Position of a Volcanic Event According to the Stage of Volcano-Tectonic Earthquake Swarm |
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150 | (1) |
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8.2 Additional Data About Volcano-Tectonic Earthquake Swarm Properties |
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150 | (6) |
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8.2.1 Size of Volcano-Tectonic Earthquake Swarm Area |
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150 | (1) |
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8.2.2 Earthquake Swarm Duration |
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151 | (2) |
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8.2.3 Magnitude---Frequency Relations of Events in Volcano-Tectonic Earthquake Swarms |
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153 | (3) |
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8.3 Some Regularities in the Volcano-Tectonic Earthquake Swarms Proclaiming Reawakening of Andesitic and Dacitic Volcanoes |
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156 | (5) |
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8.3.1 Relationship Between the Duration of Stage 1 and the VEI of Forthcoming Explosion |
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158 | (1) |
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8.3.2 Relationship Between the Duration of Stage 2 and Postexplosion Dome Building |
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159 | (1) |
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8.3.3 The Conceptual Model of Reawakening Process |
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159 | (2) |
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9 Source Properties of Volcano-Tectonic Earthquakes |
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161 | (28) |
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9.1 Focal Mechanisms of Volcano-Tectonic Earthquakes: Double-Couple and Non-Double-Couple Models |
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161 | (7) |
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9.1.1 Double-Couple Model |
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161 | (4) |
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9.1.2 Non-Double-Couple Model |
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165 | (3) |
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9.2 Source Spectral Characteristics of Volcano-Tectonic Earthquakes |
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168 | (9) |
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9.2.1 Spectra of Total Records of Volcano-Tectonic Earthquakes |
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170 | (1) |
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9.2.2 Spectral Source Characteristics of Volcano-Tectonic Earthquakes |
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171 | (6) |
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9.3 Temporal Variations of the Source Spectral Characteristics and Focal Mechanisms of Volcano-Tectonic Earthquakes in the Course of Volcanic Activity |
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177 | (5) |
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9.3.1 Corner Frequencies Variations |
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177 | (3) |
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9.3.2 Stress-Drop Variations |
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180 | (2) |
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9.3.3 Stress Field Rotations |
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182 | (1) |
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9.4 Seismo-Tectonic Deformations in the Volcanic Region |
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182 | (7) |
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10 Significant Volcano-Tectonic Earthquakes and Their Role in Volcanic Processes |
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189 | (28) |
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10.1 Selection of Significant Volcano-Tectonic Earthquakes that Occurred in the Twentieth Century |
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191 | (1) |
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10.2 Focal Rupturing of Significant Volcano-Tectonic Earthquakes and Its Role in Volcanic Processes |
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191 | (8) |
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10.2.1 Rupturing of the Magnitude Mw 5.2 Earthquake Preceding the 1989 Teishi Knoll Submarine Eruption |
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193 | (2) |
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10.2.2 Rupturing of the Magnitude Mw 7.1 Earthquake Preceding the 1996 Akademia Nauk Volcano Subaqual Eruption |
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195 | (1) |
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10.2.3 Rupturing of the Magnitude Mw 5.6 Earthquake Preceding the 1996 Grimsvøtn Volcano Subglacial Eruption |
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196 | (3) |
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10.3 The Magnitude 7 Volcano-Tectonic Earthquakes in Volcanic Processes |
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199 | (4) |
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10.3.1 Event No. 2, Katmai, Alaska |
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200 | (1) |
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10.3.2 Event No. 3, Sakurajima, Japan |
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201 | (2) |
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10.4 Seismic Hazard of Significant Volcano-Tectonic Earthquakes |
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203 | (14) |
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10.4.1 Maximum Magnitude Mmax |
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204 | (7) |
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10.4.2 Attenuation of Earthquake Intensity with Distance for Volcanic Earthquakes |
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211 | (2) |
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213 | (2) |
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10.4.4 Estimation of the Seismic Hazard of Volcanic Activity of Volcan de Colima, Mexico |
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215 | (2) |
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11 Origin of Eruption Earthquakes |
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217 | (20) |
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11.1 Volcanic Processes Generating Seismic Signals of Eruption Earthquakes |
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217 | (2) |
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11.1.1 Processes Within the Volcanic Conduit |
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217 | (1) |
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217 | (2) |
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11.2 Source Mechanisms of Eruption Earthquakes |
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219 | (5) |
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11.2.1 A Force System Equivalent to a Volcanic Eruption |
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219 | (3) |
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11.2.2 Seismic Moment Tensors of Some Non-Double-Couple Sources of Eruption Earthquakes |
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222 | (2) |
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11.3 Models of the Eruption Earthquake Sources |
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224 | (13) |
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11.3.1 Models Based on the Vibration of Magma-Filled Structures |
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224 | (4) |
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11.3.2 Models Based on Degassing Process of Magma |
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228 | (7) |
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11.3.3 Modeling of Seismic Signals Generated by Pyroclastic Flows and Rockfalls |
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235 | (2) |
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237 | (24) |
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12.1 Seismograms and Spectra |
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237 | (1) |
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12.2 Location of Volcanic Tremor |
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237 | (1) |
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12.2.1 Oshima Volcano, Izu Islands |
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237 | (1) |
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12.2.2 Etna Volcano, Sicily |
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238 | (1) |
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12.3 Volcanic Tremors in Eruptive Process |
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238 | (6) |
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12.3.1 Etna Volcano, Sicily |
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239 | (1) |
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12.3.2 Pavlof Volcano, Alaska |
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240 | (1) |
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12.3.3 Kilauea Volcano, Hawaii |
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241 | (1) |
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12.3.4 Klyuchevskoy Volcano, Kamchatka |
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242 | (2) |
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12.4 Relationship Between the Intensity of Volcanic Tremor and Volcanic Events |
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244 | (2) |
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12.5 Special Cases of Volcanic Tremors |
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246 | (15) |
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246 | (6) |
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252 | (4) |
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12.5.3 Long-Period Tremor |
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256 | (2) |
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258 | (3) |
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13 Seismic Signals Associated with Pyroclastic Flows, Rockfalls, and Lahars |
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261 | (34) |
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13.1 Occurrence of Pyroclastic Flows, Rockfalls, and Lahars During Volcanic Eruptions |
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261 | (1) |
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13.2 Seismic Signals Associated with Pyroclastic Flows and Rockfalls: Waveforms and Spectra |
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261 | (12) |
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13.2.1 Seismic Signals of Pyroclastic Flows Produced by the Partial Collapse of Lava Dome |
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263 | (2) |
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13.2.2 Seismic Signals of Pyroclastic Flows Produced by the Collapse of Eruption Column |
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265 | (2) |
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13.2.3 Seismic Signals of Pyroclastic Flows Produced by the Explosive Destruction of Growing Lava Dome |
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267 | (3) |
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13.2.4 Seismic Signals Produced by Rockfall |
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270 | (2) |
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13.2.5 Spectral Characteristics |
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272 | (1) |
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13.3 Occurrences of Earthquakes Associated with Pyroclastic Flows and Rockfalls |
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273 | (1) |
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13.4 Relationship Between the Pyroclastic Flow and Rockfall Earthquakes and Seismo-Volcanic Activity During Lava Emission |
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273 | (3) |
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13.5 Quantification of Pyroclastic Flow and Rockfall Earthquakes |
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276 | (6) |
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13.5.1 Quantification of Pyroclastic Flow and Rockfall Earthquakes Occurring Due to Partial Collapse of the Lava Dome and Recorded by Short-Period Instruments at Volcan de Colima, Mexico |
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278 | (2) |
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13.5.2 Relationship Between the Magnitude of Pyroclastic Flow and Rockfall Earthquakes and the Volume of Pyroclastic Flows |
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280 | (1) |
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13.5.3 Relationship Between the Amplitude of Long-Period Records of Pyroclastic Flow and Rockfall Earthquakes and the Volume of Pyroclastic Flows |
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281 | (1) |
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13.6 Location Pyroclastic Flows Using the Amplitude Signals of Earthquakes |
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282 | (1) |
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13.7 Seismic Signals Associated with Lahars: Waveforms and Spectra |
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282 | (5) |
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13.8 Seismic Signals as a Source of Information About the Lahar Structure |
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287 | (3) |
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13.9 Seismic Tracking of Lahars |
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290 | (2) |
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13.10 Comparison of the Seismic Characteristics of Pyroclastic Flows and Lahars |
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292 | (3) |
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14 Seismic Signals Associated with Volcanic Explosions |
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295 | (32) |
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14.1 Waveforms and Spectra |
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296 | (3) |
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14.1.1 Strombolian Explosions |
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296 | (1) |
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14.1.2 Vulcanian Explosions |
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297 | (1) |
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14.1.3 Phreato-Magmatic Explosions |
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297 | (2) |
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14.2 Nature of the Seismic Signals of Explosive Earthquakes |
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299 | (6) |
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14.2.1 Comparison of the Contemporary Video and Seismic Records During an Explosion |
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299 | (3) |
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14.2.2 Type of Waves Composing the Seismic Signal of an Explosion |
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302 | (3) |
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14.3 Sources of Explosion Earthquakes and Their Quantification |
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305 | (13) |
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14.3.1 Multiple Source of Explosions |
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307 | (4) |
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14.3.2 Two-Stage Model of Explosive Process |
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311 | (3) |
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14.3.3 Relationship Between the Seismic Moment of Preliminary LP Phase and the Energy of Explosions for Sakurajima Volcano |
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314 | (4) |
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14.3.4 Volcanic Explosive Process as a Source of Hybrid Earthquakes |
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318 | (1) |
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14.4 Location of Explosion Earthquakes |
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318 | (1) |
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14.4.1 Location of the Initial Sub-Events from Waveform Inversion |
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318 | (1) |
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319 | (3) |
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14.6 Explosion Earthquakes in Eruptive Process |
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322 | (5) |
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15 Long-Period and Very Long-Period Seismic Signals at Volcanoes |
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327 | (28) |
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15.1 Waveforms and Spectra |
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327 | (10) |
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15.1.1 Long-Period Seismic Signals |
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327 | (1) |
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15.1.2 Very Long-Period Seismic Signals |
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328 | (3) |
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15.1.3 Occurrences of LP and VLP Events |
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331 | (3) |
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15.1.4 Nature of LP and VLP Seismic Signals |
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334 | (3) |
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15.2 Geometry of the Sources of LP and VLP Seismic Signals |
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337 | (2) |
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15.3 Type of Fluid Within the Fluid-Filled Cracks |
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339 | (8) |
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340 | (1) |
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15.3.2 Complex Frequencies of the LP Seismic Signal for Different Fluids |
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341 | (1) |
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15.3.3 Identification of the Type of Fluid from LP Seismic Signals |
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341 | (6) |
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15.4 Location of the Sources of LP and VLP Events |
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347 | (4) |
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15.5 Conceptual Models of the Relationship Between the Sources of the LP and VLP Seismic Signals and Their Role in Eruptive Process |
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351 | (4) |
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16 Swarms of Microearthquakes Associated with Effusive and Explosive Activity at Volcanoes |
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355 | (26) |
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16.1 Waveforms and Spectra |
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355 | (2) |
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16.2 Structure of Microearthquake Swarms |
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357 | (5) |
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16.3 Microearthquake Swarms in Eruption Process |
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362 | (9) |
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16.3.1 Kizimen volcano, Kamchatka |
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362 | (2) |
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16.3.2 Stromboli volcano, Aeolean Islands |
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364 | (2) |
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16.3.3 Mount St. Helens, Cascades |
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366 | (1) |
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16.3.4 Ubinas volcano, Peru |
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367 | (1) |
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16.3.5 Volcan de Colima, Mexico |
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368 | (3) |
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16.4 Nature of Microearthquakes |
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371 | (10) |
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16.4.1 Similarity Between the Microearthquake Waveforms and the Seismic Signals Well-Associated with the Volcanic Events |
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371 | (4) |
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16.4.2 Quantification of Microearthquakes |
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375 | (5) |
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16.4.3 Nature of Microearthquakes Resolved from Waveform Inversion |
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380 | (1) |
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17 Acoustic Waves Generated by Volcanic Eruptions |
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381 | (26) |
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17.1 Infrasonic Acoustic Waves from Small Volcanic Explosions (VEI 1 and 2) |
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381 | (9) |
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17.1.1 Waveforms and Spectra |
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382 | (1) |
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17.1.2 Families of Infrasonic Signals |
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383 | (1) |
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17.1.3 Source Location of the Infrasonic Events |
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383 | (3) |
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17.1.4 Relationship Between the Amplitudes of the Seismic and Infrasonic Signals |
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386 | (4) |
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17.2 Long-Period Acoustic and Acoustic-Gravity Waves from Large Volcanic Explosions (VEI 4--6) |
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390 | (3) |
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17.2.1 Near-Field Waveforms of the Long-Period Acoustic Waves |
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390 | (1) |
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17.2.2 Far-Field Registrations of the Long-Period Acoustic Waves |
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391 | (2) |
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17.3 Acoustic Waves Produced by the Lava Dome Collapse and the Propagation of Pyroclastic Flow and Rockfalls |
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393 | (6) |
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393 | (2) |
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17.3.2 Pyroclastic Flow Propagation |
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395 | (3) |
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17.3.3 Large Rockfall Propagation |
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398 | (1) |
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17.4 Acoustic Waves Produced During Volcanic Microearthquake Swarms ("Drumbeats") |
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399 | (2) |
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17.5 Utility of the Acoustic Signals for Volcano Activity Monitoring |
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401 | (6) |
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17.5.1 Estimation of the Energy of Eruptive Events |
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401 | (2) |
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17.5.2 Reconstruction of the Process of Dome Collapses and Pyroclastic Flow Movement |
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403 | (2) |
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17.5.3 Monitoring of Phreatic and Strombolian Explosions |
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405 | (2) |
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18 Seismic Monitoring of Volcanic Activity and Forecasting of Volcanic Eruptions |
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407 | (26) |
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18.1 Methodology of Seismic Monitoring of Volcanic Activity |
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407 | (9) |
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18.1.1 Seismic Networks Around Volcanoes |
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407 | (3) |
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18.1.2 Initial Processing of Seismic Data |
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410 | (2) |
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18.1.3 Automatic Classification of the Seismic Signals |
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412 | (4) |
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18.1.4 Location of Seismic Events |
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416 | (1) |
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18.2 Applications of Volcanic Seismicity to the Forecasting of Volcanic Eruptions and Predicting of Volcanic Hazards |
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416 | (17) |
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18.2.1 Methods Based on the Statistical Variations in the Parameters of Volcano-Tectonic Earthquakes |
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417 | (7) |
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18.2.2 Chronicle of Some Forecasting of Volcanic Eruptions Based on Seismic Monitoring |
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424 | (9) |
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19 Seismic Activity at Dormant Volcanic Structures: A Problem of Failed Eruption |
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433 | |
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19.1 Failed Eruptions: Case Studies |
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433 | (12) |
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19.1.1 Failed Eruptions at Large Calderas |
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433 | (4) |
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19.1.2 Failed Eruptions at Strato-Volcanoes |
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437 | (3) |
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19.1.3 Failed Eruptions in Rift Settings |
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440 | (5) |
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19.2 Modeling of Magma Ascent Resisting |
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445 | (6) |
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19.2.1 Experimental Study of the Ascent of a Fixed Magma Volume |
|
|
446 | (1) |
|
19.2.2 Arrest of Propagating Dyke Due to Mechanical Barriers and Density Stratification in an Upper Crustal Horizon |
|
|
447 | (4) |
|
19.3 Monitoring of the Seismic Activity at Dormant Volcanoes |
|
|
451 | |
|
19.3.1 Monitoring of Andesitic and Dacitic Dormant Volcanoes |
|
|
452 | (1) |
|
19.3.2 Monitoring of Basaltic Dormant Volcanoes |
|
|
453 | (4) |
|
|
457 | |