VOLCANIC SEISMOLOGY

■ Abstract Recent developments in volcanic seismology include new techniques to improve earthquake locations that have changed clouds of earthquakes to lines (faults) for high-frequency events and small volumes for low-frequency (LF) events. Spatial mapping of the b-value shows regions of normal b and high b anomalies at depths of 3–4 and 7–10 km. Increases in b precede some eruptions. LF events and very-long-period (VLP) events have been recorded at many volcanoes, and models are becoming increasingly sophisticated. Deep long-period (LP) events are fairly common, but may represent several processes. Acoustic sensors have greatly improved the study of volcanic explosions. Volcanic tremor is stronger for fissure eruptions, phreatic eruptions, and higher gas contents. Path and site effects can be extreme at volcanoes. Seismicity at volcanoes is triggered by large earthquakes, although mechanisms are still uncertain. A number of volcanoes have significant deformation with very little seismicity. Tomography has benefited from improved techniques and better instrumental arrays.

[1]  Takeshi Minakami,et al.  Seismology of Volcanoes in Japan , 1974 .

[2]  Bruce R. Julian,et al.  Volcanic tremor: Nonlinear excitation by fluid flow , 1994 .

[3]  E. Boschi,et al.  Phenomenological evidence in favor of a remote seismic coupling for large volcanic eruptions , 2004 .

[4]  Zhong Lu,et al.  Aseismic inflation of Westdahl Volcano, Alaska, revealed by satellite radar interferometry , 2000 .

[5]  A. D. Miller,et al.  Non‐double‐couple earthquake mechanisms at the Hengill‐Grensdalur Volcanic Complex, Southwest Iceland , 1997 .

[6]  Jeffrey B. Johnson.  Interpretation of infrasound generated by erupting volcanoes and seismo-acoustic energy partitioning during Strombolian explosions , 2000 .

[7]  S. McNutt,et al.  The Duration-Amplitude Distribution of Volcanic Tremor , 2019 .

[8]  B. Chouet,et al.  Wavefield properties of a shallow long-period event and tremor at Kilauea Volcano, Hawaii , 2001 .

[9]  J. Neuberg.  Characteristics and causes of shallow seismicity in andesite volcanoes , 2000, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[10]  Stephen R. McNutt,et al.  Seismic Monitoring and Eruption Forecasting of Volcanoes: A Review of the State-of-the-Art and Case Histories , 1996 .

[11]  Markus Båth,et al.  Earthquake magnitude — recent research and current trends , 1981 .

[12]  M. Garces,et al.  Theory of acoustic propagation in a multi-phase stratified liquid flowing within an elastic-walled conduit of varying cross-sectional area , 2000 .

[13]  Kelin Wang,et al.  A Silent Slip Event on the Deeper Cascadia Subduction Interface , 2001, Science.

[14]  H. Shimamura,et al.  Rabaul volcano, Papua New Guinea: seismic tomographic imaging of an active caldera , 2003 .

[15]  Jonathan M. Lees,et al.  P wave anisotropy, stress, and crack distribution at Coso geothermal field, California , 1999 .

[16]  M. Ukawa.  Excitation mechanism of large-amplitude volcanic tremor associated with the 1989 Ito-oki submarine eruption, central Japan , 1993 .

[17]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[18]  Michael Manga,et al.  A mechanism for sustained groundwater pressure changes induced by distant earthquakes , 2003 .

[19]  M. Simons,et al.  A satellite geodetic survey of large-scale deformation of volcanic centres in the central Andes , 2002, Nature.

[20]  T. Ohminato,et al.  Aso94: Aso seismic observation with broadband instruments , 2000 .

[21]  Bruce R. Julian,et al.  Seismic image of a CO2 reservoir beneath a seismically active volcano , 1998 .

[22]  F. Waldhauser,et al.  Fault structure and kinematics of the Long Valley Caldera region, California, revealed by high-accuracy earthquake hypocenters and focal mechanism stress inversions , 2002 .

[23]  C. Frohlich,et al.  Teleseismic b values; Or, much ado about 1.0 , 1993 .

[24]  E. Fujita,et al.  Geometrical effects and low‐attenuation resonance of volcanic fluid inclusions for the source mechanism of long‐period earthquakes , 2003 .

[25]  F. Pollitz,et al.  Earthquake–Volcano Interactions , 2002 .

[26]  S. Moran.  Multiple seismogenic processes for high-frequency earthquakes at Katmai National Park, Alaska: Evidence from stress tensor inversions of fault-plane solutions , 2003 .

[27]  Robert W. Clayton,et al.  Adaptation of Back Projection Tomography to Seismic Travel Time Problems , 1988 .

[28]  S. McNutt.  Volcanic Tremor from Around the World: 1992 Update , 1994 .

[29]  J. Oikawa,et al.  Very-Long-Period Seismic Signals and Caldera Formation at Miyake Island, Japan , 2001, Science.

[30]  Christopher John Young,et al.  An Automatic, Adaptive Algorithm for Refining Phase Picks in Large Seismic Data Sets , 2002 .

[31]  Guust Nolet,et al.  Seismic tomography shows that upwelling beneath Iceland is confined to the upper mantle , 2001 .

[32]  S. Honda,et al.  Broadband seismic observation at the Sakurajima Volcano, Japan , 1992 .

[33]  Stefan Wiemer,et al.  Anomalously high b-values in the South Flank of Kilauea volcano, Hawaii: evidence for the distribution of magma below Kilauea's East rift zone , 2001 .

[34]  S. Moran,et al.  Seismic Response of the Katmai Volcanoes to the 6 December 1999 Magnitude 7.0 Karluk Lake Earthquake, Alaska , 2001 .

[35]  Christopher R. J. Kilburn,et al.  Multiscale fracturing as a key to forecasting volcanic eruptions , 2003 .

[36]  C. Chiarabba,et al.  Recent seismicity and tomographic modeling of the Mount Etna plumbing system , 2000 .

[37]  Max Wyss,et al.  The locations of magma chambers at Mt. Etna, Italy, mapped by b‐values , 1999 .

[38]  M. Takeo,et al.  The source of explosive eruptions of Sakurajima volcano, Japan , 1994 .

[39]  K. Olsen,et al.  Models of tremor and low-frequency earthquake swarms on Montserrat , 2000 .

[40]  M. Iguchi.  A Vertical Expansion Source Model for the Mechanisms of Earthquakes Originated in the Magma Conduit of an Andesitic Volcano : Sakurajima, Japan , 1994 .

[41]  R. Aster,et al.  Broadband recording of Strombolian explosions and associated very‐long‐period seismic signals on Mount Erebus Volcano, Ross Island, Antarctica , 1998 .

[42]  Cheng Yu Wu,et al.  The seismic response , 1996 .

[43]  Zhong Lu,et al.  Synthetic aperture radar interferometry of Okmok volcano, Alaska: radar observations , 2000 .

[44]  W. Ellsworth,et al.  Seismicity Remotely Triggered by the Magnitude 7.3 Landers, California, Earthquake , 1993, Science.

[45]  P. Okubo,et al.  Kilauea Volcano provides hot seismic data for joint Japanese‐U.S. experiment , 1997 .

[46]  B. Chouet,et al.  A numerical simulation of magma motion, crustal deformation, and seismic radiation associated with volcanic eruptions , 2003 .

[47]  F. Waldhauser,et al.  A Double-Difference Earthquake Location Algorithm: Method and Application to the Northern Hayward Fault, California , 2000 .

[48]  Jurgen Neuberg,et al.  Highlights from a seismic broadband array on Stromboli Volcano , 1994 .

[49]  Charles S. Mueller,et al.  COMMENTS ON "SOME RECENT Lg PHASE DISPLACEMENT SPECTRAL DENSITIES AND THEIR IMPLICATIONS WITH RESPECT TO PREDICTION OF GROUND MOTIONS IN EASTERN NORTH AMERICA" BY R. STREET , 1986 .

[50]  Shinji Toda,et al.  Evidence from the ad 2000 Izu islands earthquake swarm that stressing rate governs seismicity , 2002, Nature.

[51]  Milton Garces,et al.  Magma acoustics and time‐varying melt properties at Arenal Volcano, Costa Rica , 1998 .

[52]  G. Latham,et al.  An experimental study of thermally induced microfracturing and its relation to volcanic seismicity , 1970 .

[53]  Clifford H. Thurber,et al.  Double-Difference Tomography: The Method and Its Application to the Hayward Fault, California , 2003 .

[54]  The July 1994 episode of seismic activity at Colima Volcano, Mexico , 1995 .

[55]  Robert B. Smith,et al.  Changes in geyser eruption behavior and remotely triggered seismicity in Yellowstone National Park produced by the 2002 M 7.9 Denali fault earthquake, Alaska , 2004 .

[56]  Charlotte A. Rowe,et al.  Seismic and acoustic observations at Mount Erebus Volcano, Ross Island, Antarctica, 1994-1998 , 2000 .

[57]  H. Kanamori,et al.  Harmonic excitation of mantle Rayleigh waves by the 1991 eruption of Mount Pinatubo, Philippines , 1992 .

[58]  S. McNutt.  Volcanic Tremor Amplitude Correlated with Eruption Explosivity and its Potential Use in Determining Ash Hazards to Aviation , 1994 .

[59]  K. Obara,et al.  Magmatic Dike Resonances Inferred from Very-Long-Period Seismic Signals , 2003, Science.

[60]  P. Reasenberg,et al.  Earthquake triggering by seismic waves following the Landers and Hector Mine earthquakes , 2001, Nature.

[61]  Max Wyss,et al.  Spatial variations in the frequency‐magnitude distribution of earthquakes at Soufriere Hills Volcano, Montserrat, West Indies , 1998 .

[62]  Kazushige Obara,et al.  Nonvolcanic Deep Tremor Associated with Subduction in Southwest Japan , 2002, Science.

[63]  D. Hill.  Earthquakes and Carbon Dioxide Beneath Mammoth Mountain, California , 1996 .

[64]  T. L. Murray,et al.  Seismic evolution of the 1989-1990 eruption sequence of Redoubt Volcano, Alaska , 1994 .

[65]  R. White,et al.  Observations of deep long-period (DLP) seismic events beneath Aleutian arc volcanoes; 1989-2002 , 2002 .

[66]  M. Takeo,et al.  Source mechanism of seismic waves excited by pyroclastic flows observed at Unzen volcano, Japan , 1994 .

[67]  Zhong Lu,et al.  Magmatic inflation at a dormant stratovolcano: 1996–1998 activity at Mount Peulik volcano, Alaska, revealed by satellite radar interferometry , 2002 .

[68]  P. Okubo,et al.  Three‐dimensional velocity structure of the Kilauea Caldera, Hawaii , 1999 .

[69]  Y. Morita,et al.  Detection of a crack‐like conduit beneath the active crater at Aso Volcano Japan , 1999 .

[70]  M. Wyss,et al.  Spatial Variations in the Frequency-Magnitude Distribution of Earthquakes at Mount Pinatubo Volcano , 2004 .

[71]  S. McNutt.  Eruptions of Pavlof Volcano, Alaska, and their Possible Modulation by Ocean Load and Tectonic Stresses: Re-evaluation of the Hypothesis Based on New Data from 1984–1998 , 1999 .

[72]  M. Kasahara,et al.  Seismic Activity Immediately before and in the Early Stage of the 1977 Eruption of Usu Volcano, Hokkaidou, Japan , 1980 .

[73]  F. Vernon,et al.  Breathing of the seafloor: Tidal correlations of seismicity at Axial volcano , 2002 .

[74]  Robert B. Smith,et al.  Seismotectonics and stress field of the Yellowstone volcanic plateau from earthquake first‐motions and other indicators , 2004 .

[75]  Salvatore Graziani,et al.  Automatic classification of volcanic earthquakes by using Multi-Layered neural networks , 1996 .

[76]  J. Neuberg,et al.  A model of the seismic wavefield in gas-charged magma: application to Soufrière Hills Volcano, Montserrat , 2002, Geological Society, London, Memoirs.

[77]  Takeshi Nishimura,et al.  Source process of very long period seismic events associated with the 1998 activity of Iwate Volcano, northeastern Japan , 2000 .

[78]  Zhong Lu,et al.  Deformation associated with the 1997 eruption of Okmok volcano, Alaska , 2002 .

[79]  John C. Lahr,et al.  Three‐dimensional P and S wave velocity structure of Redoubt Volcano, Alaska , 1996 .

[80]  Bradford Sturtevant,et al.  Earthquakes, volcanoes, and rectified diffusion , 1998 .

[81]  M. Wyss.  Towards a Physical Understanding of the Earthquake Frequency Distribution , 1973 .

[82]  T. Ohminato,et al.  10s‐period volcanic tremors observed over a wide area in southwestern Japan , 1994 .

[83]  P. Bard,et al.  Study of seismic site effects using H/V spectral ratios at Arenal Volcano, Costa Rica , 2001 .

[84]  M. Wyss,et al.  Temporal-spatial variations of stress at Redoubt volcano, Alaska, inferred from inversion of fault plane solutions , 2004 .

[85]  Takao Ohminato,et al.  Broadband seismic observations at Satsuma‐Iwojima Volcano, Japan , 1997 .

[86]  Stephen R. McNutt,et al.  New constraints on source processes of volcanic tremor at Arenal Volcano, Costa Rica, using broadband , 1997 .

[87]  P. Okubo,et al.  Location of long‐period events below Kilauea Volcano using seismic amplitudes and accurate relative relocation , 2003 .

[88]  C. Thurber.  Seismic Detection of the Summit Magma Complex of Kilauea Volcano, Hawaii , 1984, Science.

[89]  T. Iidaka,et al.  Mechanism of Phreatic Eruptions at Aso Volcano Inferred from Near-Field Broadband Seismic Observations , 1996, Science.

[90]  M. Hellweg.  Physical models for the source of Lascar's harmonic tremor , 2000 .

[91]  Bernard A. Chouet,et al.  Long-period volcano seismicity: its source and use in eruption forecasting , 1996, Nature.

[92]  Harley M. Benz,et al.  Imaging the crustal magma sources beneath Mauna Loa and Kilauea volcanoes, Hawaii , 1997 .

[93]  Ian G. Main,et al.  A CHARACTERISTIC EARTHQUAKE MODEL OF THE SEISMICITY PRECEDING THE ERUPTION OF MOUNT ST HELENS ON 18 MAY 1980 , 1987 .