Search Results - "Dawson, Phillip B"

Eruption dynamics at Mount St. Helens imaged from broadband seismic waveforms: Interaction of the shallow magmatic and hydrothermal systems by Waite, Gregory P., Chouet, Bernard A., Dawson, Phillip B.

“…The current eruption at Mount St. Helens is characterized by dome building and shallow, repetitive, long‐period (LP) earthquakes. Waveform cross‐correlation…”
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Monitoring very-long-period seismicity at Kilauea Volcano, Hawaii by Dawson, Phillip B., Benítez, M. C., Chouet, Bernard A., Wilson, David, Okubo, Paul G.

“…On 19 March, 2008 eruptive activity returned to the summit of Kilauea Volcano, Hawaii with the formation of a new vent within the Halemaumau pit crater. The…”
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Origin of the pulse‐like signature of shallow long‐period volcano seismicity by Chouet, Bernard A., Dawson, Phillip B.

“…Short‐duration, pulse‐like long‐period (LP) events are a characteristic type of seismicity accompanying eruptive activity at Mount Etna in Italy in 2004 and…”
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Identifying bubble collapse in a hydrothermal system using hidden Markov models by Dawson, Phillip B., Benítez, M. C., Lowenstern, Jacob B., Chouet, Bernard A.

“…Beginning in July 2003 and lasting through September 2003, the Norris Geyser Basin in Yellowstone National Park exhibited an unusual increase in ground…”
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Source process of a long-period event at Kilauea volcano, Hawaii by Kumagai, Hiroyuki, Chouet, Bernard A., Dawson, Phillip B.

“…We analyse a long-period (LP) event observed by a dense seismic network temporarily operated at Kilauea volcano, Hawaii, in 1996. We systematically perform…”
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High-rate very-long-period seismicity at Yasur volcano, Vanuatu: source mechanism and decoupling from surficial explosions and infrasound by Matoza, Robin S, Chouet, Bernard A, Jolly, Arthur D, Dawson, Phillip B, Fitzgerald, Rebecca H, Kennedy, Ben M, Fee, David, Iezzi, Alexandra M, Kilgour, Geoff N, Garaebiti, Esline, Cevuard, Sandrine

“…SUMMARY Yasur volcano, Vanuatu is a continuously active open-vent basaltic-andesite stratocone with persistent and long-lived eruptive activity. We present…”
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Seismic source mechanism of degassing bursts at Kilauea Volcano, Hawaii: Results from waveform inversion in the 10-50 s band by Chouet, Bernard A., Dawson, Phillip B., James, Mike R., Lane, Stephen J.

“…The current (March 2008 to February 2009) summit eruptive activity at Kilauea Volcano is characterized by explosive degassing bursts accompanied by very long…”
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Origin and Properties of Hydrothermal Tremor at Lone Star Geyser, Yellowstone National Park, USA by Nayak, Avinash, Manga, Michael, Hurwitz, Shaul, Namiki, Atsuko, Dawson, Phillip B.

“…Geysers are rare geologic features that intermittently discharge liquid water and steam driven by heating and decompression boiling. The cause of variability…”
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Determining the seismic source mechanism and location for an explosive eruption with limited observational data: Augustine Volcano, Alaska by Dawson, Phillip B., Chouet, Bernard A., Power, John

“…Waveform inversions of the very‐long‐period components of the seismic wavefield produced by an explosive eruption that occurred on 11 January, 2006 at…”
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Source characterization for an explosion during the 2009 eruption of Redoubt Volcano from very-long-period seismic waves by Haney, Matthew M., Chouet, Bernard A., Dawson, Phillip B., Power, John A.

“…The 2009 eruption of Redoubt produced several very-long-period (VLP) signals associated with explosions. We invert for the source location and mechanism of an…”
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Source mechanism of small long-period events at Mount St. Helens in July 2005 using template matching, phase-weighted stacking, and full-waveform inversion by Matoza, Robin S., Chouet, Bernard A., Dawson, Phillip B., Shearer, Peter M., Haney, Matthew M., Waite, Gregory P., Moran, Seth C., Mikesell, T. Dylan

“…Long‐period (LP, 0.5‐5 Hz) seismicity, observed at volcanoes worldwide, is a recognized signature of unrest and eruption. Cyclic LP “drumbeating” was the…”
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Tomographic inversion of P-wave velocity and Q structures beneath the Kirishima volcanic complex, southern Japan, based on finite difference calculations of complex traveltimes by Tomatsu, Toshitaka, Kumagai, Hiroyuki, Dawson, Phillip B.

“…We estimate the P-wave velocity and attenuation structures beneath the Kirishima volcanic complex, southern Japan, by inverting the complex traveltimes…”
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Source mechanisms of explosions at Stromboli Volcano, Italy, determined from moment-tensor inversions of very-long-period data by Chouet, Bernard, Dawson, Phillip, Ohminato, Takao, Martini, Marcello, Saccorotti, Gilberto, Giudicepietro, Flora, De Luca, Gaetano, Milana, Giuliano, Scarpa, Roberto

“…Seismic data recorded in the 2–30 s band at Stromboli Volcano, Italy, are analyzed to quantify the source mechanisms of Strombolian explosions during September…”
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Determining the seismic source mechanism and location for an explosive eruption with limited observational data: Augustine Volcano, Alaska: ERUPTION MECHANISM AT AUGUSTINE by Dawson, Phillip B., Chouet, Bernard A., Power, John

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Source characterization for an explosion during the 2009 eruption of Redoubt Volcano from very-long-period seismic waves: The 2009 Eruption of Redoubt Volcano, Alaska by HANEY, Matthew M, CHOUET, Bernard A, DAWSON, Phillip B, POWER, John A

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Waveform inversion of very long period impulsive signals associated with magmatic injection beneath Kilauea volcano, Hawaii by Ohminato, Takao, Chouet, Bernard A., Dawson, Phillip, Kedar, Sharon

“…We use data from broadband seismometers deployed around the summit of Kilauea Volcano to quantify the mechanism associated with a transient in the flow of…”
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Spatial extent of a hydrothermal system at Kilauea Volcano, Hawaii, determined from array analyses of shallow long-period seismicity: 2. Results by Almendros, Javier, Chouet, Bernard, Dawson, Phillip

“…Array data from a seismic experiment carried out at Kilauea Volcano, Hawaii, in February 1997, are analyzed by the frequency‐slowness method. The slowness…”
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Shallow-velocity models at the Kilauea Volcano, Hawaii, determined from array analyses of tremor wavefields by Saccorotti, Gilberto, Chouet, Bernard, Dawson, Phillip

“…The properties of the surface wavefield at Kilauea Volcano are analysed using data from small-aperture arrays of short-period seismometers deployed in and…”
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Spatial extent of a hydrothermal system at Kilauea Volcano, Hawaii, determined from array analyses of shallow long-period seismicity: 1. Method by Almendros, Javier, Chouet, Bernard, Dawson, Phillip

“…We present a probabilistic method to locate the source of seismic events using seismic antennas. The method is based on a comparison of the event azimuths and…”
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Source and path effects in the wave fields of tremor and explosions at Stromboli Volcano, Italy by Chouet, Bernard, Saccorotti, Gilberto, Martini, Marcello, Dawson, Phillip, De Luca, Gaetano, Milana, Giuliano, Scarpa, Roberto

“…The wave fields generated by Strombolian activity are investigated using data from small‐aperture seismic arrays deployed on the north flank of Stromboli and…”
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