Publications
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Merapi 2010 eruption—Chronology and extrusion rates monitored with satellite radar and used in eruption forecasting
Despite dense cloud cover, satellite-borne commercial Synthetic Aperture Radar (SAR) enabled frequent monitoring of Merapi volcano's 2010 eruption. Near-real-time interpretation of images derived from the amplitude of the SAR signals and timely delivery of these interpretations to those responsible for warnings, allowed satellite remote sensing for the first time to play an equal role with in situ
Authors
John S. Pallister, David J. Schneider, Julia P. Griswold, Ronald H. Keeler, William C. Burton, Christopher Noyles, Christopher G. Newhall, Antonius Ratdomopurbo
The 2010 eruption of Merapi volcano
We briefly present the normal eruption of Merapi volcano.We summarize the 2010 eruption.We list the contribution of the Special Issue of JVGR on the 2010 eruption of Merapi volcano.
Authors
Philippe Jousset, John S. Pallister, Surono
Geologic map of southwestern Sequoia National Park, Tulare County, California
This map shows the geology of 675 km2 (260 mi2) on the west slope of the Sierra Nevada, California, mainly in Sequoia National Park and Sequoia National Forest. It was produced by the U.S. Geological Survey (USGS) at the request of the National Park Service to complete the geologic map coverage of Kings Canyon and Sequoia National Parks. The area includes the Mineral King 15’ topographic quadrangl
Authors
Thomas W. Sisson, James G. Moore
Inferring fault rheology from low-frequency earthquakes on the San Andreas
Families of recurring low-frequency earthquakes (LFEs) within nonvolcanic tremor (NVT) on the San Andreas fault in central California show strong sensitivity to shear stress induced by the daily tidal cycle. LFEs occur at all levels of the tidal shear stress and are in phase with the very small, ~400 Pa, stress amplitude. To quantitatively explain the correlation, we use a model from the existing
Authors
Nicholas M. Beeler, Amanda Thomas, Roland Bürgmann, David R. Shelly
Database for the Geologic Map of Newberry Volcano, Deschutes, Klamath, and Lake Counties, Oregon
Newberry Volcano, one of the largest Quaternary volcanoes in the conterminous United States, is a broad shield-shaped volcano measuring 60 km north-south by 30 km east-west with a maximum elevation of more than 2 km. Newberry Volcano is the product of deposits from thousands of eruptions, including at least 25 in the past approximately 12,000 years (Holocene Epoch). Newberry Volcano has erupted as
Authors
Joseph A. Bard, David W. Ramsey, Norman S. MacLeod, David R. Sherrod, Lawrence A. Chitwood, Robert A. Jensen
Character, mass, distribution, and origin of tephra-fall deposits from the 2009 eruption of Redoubt Volcano, Alaska: highlighting the significance of particle aggregation
The 2009 eruption of Redoubt Volcano included 20 tephra-producing explosions between March 15, 2009 and April 4, 2009 (UTC). Next-Generation radar (NEXRAD) data show that plumes reached heights between 4.6 km and 19 km asl and were distributed downwind along nearly all azimuths of the volcano. Explosions lasted between < 1 and 31 min based on the signal duration at a distal seismic station (86 km)
Authors
Kristi L. Wallace, Michelle L Coombs, Janet R. Schaefer
Source characterization for an explosion during the 2009 eruption of Redoubt Volcano from very-long-period seismic waves
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 explosion at Redoubt volcano using waveform methods applied to broadband recordings. Such characterization of the source carries information on the geometry of the conduit and the physics of the explosion process. Inversions are carried out
Authors
Matthew M. Haney, Bernard A. Chouet, Phillip B. Dawson, John A. Power
Airborne filter pack measurements of S and Cl in the plume of Redoubt Volcano, Alaska February–May 2009
Filter pack data from six airborne campaigns at Redoubt Volcano, Alaska are reported here. These measurements provide a rare constraint on Cl output from an andesitic eruption at high emission rate (> 104 t d− 1 SO2). Four S/Cl ratios measured during a period of lava dome growth indicate a depth of last magma equilibration of 2–5 km. The S/Cl ratios in combination with COSPEC SO2 emission rate mea
Authors
Melissa Pfeffer, Michael P. Doukas, Cynthia A. Werner, William C. Evans
Emplacement of the final lava dome of the 2009 eruption of Redoubt Volcano, Alaska
After more than 8 months of precursory activity and over 20 explosions in 12 days, Redoubt Volcano, Alaska began to extrude the fourth and final lava dome of the 2009 eruption on April 4. By July 1 the dome had filled the pre-2009 summit crater and ceased to grow. By means of analysis and annotations of time-lapse webcam imagery, oblique-image photogrammetry techniques and capture and analysis of
Authors
Katharine F. Bull, Steve W. Anderson, Angela K. Diefenbach, Rick L. Wessels, Sarah M. Henton
Volcano–ice interactions precursory to the 2009 eruption of Redoubt Volcano, Alaska
In late summer of 2008, after nearly 20 years of quiescence, Redoubt Volcano began to show signs of abnormal heat flow in its summit crater. In the months that followed, the excess heat triggered melting and ablation of Redoubt's glaciers, beginning at the summit and propagating to lower elevations as the unrest accelerated. A variety of morphological changes were observed, including the creation
Authors
Heather A. Bleick, Michelle L. Coombs, Peter F. Cervelli, Katharine F. Bull, Rick Wessels
Injection, transport, and deposition of tephra during event 5 at Redoubt Volcano, 23 March, 2009
Among the events of the 2009 eruption at Redoubt Volcano, Alaska, event 5 was the best documented by radar, satellite imagery, and deposit mapping. We use the new Eulerian tephra transport model Ash3d to simulate transport and deposition of event 5 tephra at distances up to 350 km. The eruption, which started at about 1230 UTC on 23 March, 2009, sent a plume from the vent elevation (estimated at 2
Authors
Larry G. Mastin, Hans F. Schwaiger, David J. Schneider, Kristi L. Wallace, Janet Schaefer, Roger P. Denlinger
Degassing of CO2, SO2, and H2S associated with the 2009 eruption of Redoubt Volcano, Alaska
The 2009 eruption of Redoubt Volcano, Alaska was particularly well monitored for volcanic gas emissions. We report 35 airborne measurements of CO2, SO2, and H2S emission rates that span from October 2008 to August 2010. The magmatic system degassed primarily as a closed system although minor amounts of open system degassing were observed in the 6 months prior to eruption on March 15, 2009 and over
Authors
Cynthia A. Werner, Peter J. Kelly, Michael P. Doukas, Taryn Lopez, Melissa Pfeffer, Robert G. McGimsey, Christina A. Neal