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Redoubt eruption 2009

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Journal Article

Fast Identification of Volcanic Tremor and Lahar Signals during the 2009 Redoubt Eruption Using Permutation Entropy and Supervised Machine Learning

Kostas I. Konstantinou, Diah Ayu Rahmalia, Izaina Nurfitriana, Mie Ichihara
Published: 17 November 2021
Seismological Research Letters (2022) 93 (1): 435–443.
DOI: https://doi.org/10.1785/0220210176
... with supervised machine learning to evaluate their potential in identifying volcanic tremor and lahar signals recorded during the 2009 Redoubt volcano eruption. The particular dataset was chosen for the reason that the properties and occurrence times of the volcanoseismic signals during the eruption are well...
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Using repeating volcano-tectonic earthquakes to track post-eruptive activity in the conduit system at Redoubt Volcano, Alaska

Helena Buurman, Michael E. West, Diana C. Roman
Journal: Geology
Published: 01 April 2013
Geology (2013) 41 (4): 511–514.
DOI: https://doi.org/10.1130/G34089.1
...Helena Buurman; Michael E. West; Diana C. Roman Abstract In the year following the end of the 2009 eruption of Redoubt Volcano, Alaska, four significant swarms of low-frequency, low-magnitude (M L < 0.1) earthquakes occurred at shallow depths beneath the summit. Because swarms of low-frequency...
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Lightning-induced volcanic spherules

Kimberly Genareau, John B. Wardman, Thomas M. Wilson, Stephen R. McNutt, Pavel Izbekov
Journal: Geology
Published: 01 April 2015
Geology (2015) 43 (4): 319–322.
DOI: https://doi.org/10.1130/G36255.1
... two eruptions where volcanic lightning was extensively documented: the A.D. 2009 eruption of Mount Redoubt, Alaska (USA), and the 2010 eruption of Eyjafjallajökull, Iceland. These samples reveal individual glass spherules ∼50 μm in average diameter that compose <5% of the examined portion...
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Map depicting the area around <span class="search-highlight">Redoubt</span> volcano and the locations of the seis...

Map depicting the area around Redoubt volcano and the locations of the seis...

Published: 17 November 2021
Figure 1. Map depicting the area around Redoubt volcano and the locations of the seismic stations that were recording continuous waveform data during the 2009 eruption. The inset in the upper right corner shows the location of the area relative to the map of Alaska. The seismic stations shown
Journal Article

Real-time Detection of Earthquake Swarms at Redoubt Volcano, 2009

Glenn Thompson, Michael E. West
Published: 01 May 2010
Seismological Research Letters (2010) 81 (3): 505–513.
DOI: https://doi.org/10.1785/gssrl.81.3.505
... earthquake swarm alarm system capable of identifying the start of, escalations during, and end of a swarm. This system was used to monitor seismicity throughout the 2009 eruption of Redoubt volcano. The Alaska Volcano Observatory (AVO) seismically monitors 31 volcanoes in the Alaska Peninsula...
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A: Schematic timeline of <span class="search-highlight">Redoubt</span> Volcano (Alaska) unrest between 1 January ...

A: Schematic timeline of Redoubt Volcano (Alaska) unrest between 1 January ...

Published: 01 April 2013
Figure 2. A: Schematic timeline of Redoubt Volcano (Alaska) unrest between 1 January 2009 and 1 July 2010 (UTC—Universal Coordinated Time). Gray shaded areas indicate periods when Redoubt Volcano was at elevated alert. Diamonds represent shallow swarms, and triangles represent repeating volcano
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Secondary electron images of lightning-induced volcanic spherules observed ...

Secondary electron images of lightning-induced volcanic spherules observed ...

Published: 01 April 2015
Figure 2. Secondary electron images of lightning-induced volcanic spherules observed in samples from the A.D. 2009 eruption of Mount Redoubt, Alaska, USA (A–B) and the A.D. 2010 eruption of Eyjafjallajökull, Iceland (C). Textures range from almost perfect spheres to spherules displaying surface
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Photographs of (a) Augustine Volcano on 12 January 2006 (U.S. Geological Su...

Photographs of (a) Augustine Volcano on 12 January 2006 (U.S. Geological Su...

Published: 02 January 2020
Figure 2. Photographs of (a) Augustine Volcano on 12 January 2006 (U.S. Geological Survey [USGS] Photo by R. McGimsey), (b) Pavlof Volcano erupting on 28 March 2016 (photo by N. Almandmoss), (c) Redoubt Volcano with strong steam plume on 4 April 2009 (USGS Photo by R. McGimsey), and (d) Advanced
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▴ Summary of seismicity at <span class="search-highlight">Redoubt</span> volcano from 10 October 2008 to 8 April ...

▴ Summary of seismicity at Redoubt volcano from 10 October 2008 to 8 April ...

Published: 01 May 2010
Figure 3. ▴ Summary of seismicity at Redoubt volcano from 10 October 2008 to 8 April 2009, and alarms sent. A) The number of events per hour declared by the real-time event catalog. Plotted above this are lines that show swarms declared by the swarm tracking system (on this scale these lines
Journal Article

Peninsular terrane basement ages recorded by Paleozoic and Paleoproterozoic zircon in gabbro xenoliths and andesite from Redoubt volcano, Alaska

Charles R. Bacon, Jorge A. Vazquez, Joseph L. Wooden
Journal: GSA Bulletin
Published: 01 January 2012
GSA Bulletin (2012) 124 (1-2): 24–34.
DOI: https://doi.org/10.1130/B30439.1
... from disruption of domes traverse a piedmont glacier that emanates from the crater and produce lahars in the Drift River valley. Seismic monitoring of Redoubt volcano during the 1989–1990 and 2009 eruptions provides constraints on the magma plumbing system. The majority of volcano-tectonic...
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Goals and Development of the Alaska Volcano Observatory Seismic Network and Application to Forecasting and Detecting Volcanic Eruptions

John A. Power, Mathew M. Haney, Stephen M. Botnick, James P. Dixon, David Fee, A. Max Kaufman, Dane M. Ketner, John J. Lyons, Tom Parker, John F. Paskievitch, Cyrus W. Read, Cheryl Searcy, Scott D. Stihler, Gabrielle Tepp, Aaron G. Wech
Published: 02 January 2020
Seismological Research Letters (2020) 91 (2A): 647–659.
DOI: https://doi.org/10.1785/0220190216
...Figure 2. Photographs of (a) Augustine Volcano on 12 January 2006 (U.S. Geological Survey [USGS] Photo by R. McGimsey), (b) Pavlof Volcano erupting on 28 March 2016 (photo by N. Almandmoss), (c) Redoubt Volcano with strong steam plume on 4 April 2009 (USGS Photo by R. McGimsey), and (d) Advanced...
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A Repeating Event Sequence Alarm for Monitoring Volcanoes

Gabrielle Tepp
Published: 20 June 2018
Seismological Research Letters (2018) 89 (5): 1863–1876.
DOI: https://doi.org/10.1785/0220170263
... space to save figures for “on” alerts. 3 December 2017 © Seismological Society of America When Redoubt Volcano, Alaska erupted in 2009, Thompson and West (2010) introduced a real‐time general earthquake swarm alarm system (SAS) that was based on an automatically generated earthquake...
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▴ Shown from top to bottom are the significant swarm episodes that occurred...

▴ Shown from top to bottom are the significant swarm episodes that occurred...

Published: 01 May 2010
Figure 4. ▴ Shown from top to bottom are the significant swarm episodes that occurred during unrest at Redoubt volcano in 2009. In each panel the black curve shows the median event rate (from the real-time catalog), the grey curve shows surface wave reduced displacement, D RS . Black horizontal
Journal Article

Narrow‐Band Least‐Squares Infrasound Array Processing

Alexandra M. Iezzi, Robin S. Matoza, Jordan W. Bishop, Sneha Bhetanabhotla, David Fee
Published: 10 June 2022
Seismological Research Letters (2022) 93 (5): 2818–2833.
DOI: https://doi.org/10.1785/0220220042
... the least‐squares approach. We test our algorithm on a few examples of natural sources (volcanic eruptions, mass movements, and bolides) for a variety of array configurations. Our method reduces the need to choose frequency limits for processing, which may result in missed signals, and it is parallelized...
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(a) Plot of a part of infrasound waveform data of the <span class="search-highlight">Redoubt</span> volcano <span class="search-highlight">erupt</span>...

(a) Plot of a part of infrasound waveform data of the Redoubt volcano erupt...

Published: 23 October 2013
Figure 8. (a) Plot of a part of infrasound waveform data of the Redoubt volcano erupted on 28 March 2009, digitized from the published figure (Figure 10 of Fee et al., 2013 ) (solid black line) and the waveform with AWGN (S/N  = 20     dB ) (thick gray line). The original digitized
Journal Article

Varve formation during the past three centuries in three large proglacial lakes in south-central Alaska

Evelien Boes, Maarten Van Daele, Jasper Moernaut, Sabine Schmidt, Britta J.L. Jensen, Nore Praet, Darrell Kaufman, Peter Haeussler, Michael G. Loso, Marc De Batist
Journal: GSA Bulletin
Published: 22 November 2017
GSA Bulletin (2018) 130 (5-6): 757–774.
DOI: https://doi.org/10.1130/B31792.1
... with the A.D. 1989/1990 Redoubt and A.D. 1992 Mount Spurr eruptions ( Fig. 8 ). Age-depth models and corresponding error envelopes were constructed for EK12-01, EK12-04, and EK12-05. Measurements of 137 Cs conducted on sediment from core EK12-01 show a clear A.D. 1963 peak. The constant flux–constant...
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RESEARCH FOCUS: Toward a realistic formulation of fine-ash lifetime in volcanic clouds

Adam J. Durant
Journal: Geology
Published: 01 March 2015
Geology (2015) 43 (3): 271–272.
DOI: https://doi.org/10.1130/focus032015.1
... (characteristics of the eruption column such as geometry, height, mass eruption rate, vertical separation of ash and gases) (e.g., Mastin et al., 2009 ; Moxnes et al., 2014 ) and the sink (cloud microphysical processes and sedimentation) (e.g., Costa et al., 2010 ). Source and sink terms are coupled to a model...
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John Clark Lahr (1944–2009)

Robert A. Page, John Taber
Published: 01 July 2009
Seismological Research Letters (2009) 80 (4): 557–558.
DOI: https://doi.org/10.1785/gssrl.80.4.557
... of Redoubt Volcano in Alaska. Swarms of repetitious, emergent events with 2-Hz wave trains preceded most of the eruptions. Routinely determined hypocenters for these events defined a vertical cylinder at depth beneath the summit crater, but John questioned whether the cylindrical pattern was robust...
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Time-frequency decomposition

Matt Hall
Journal: The Leading Edge
Published: 01 June 2018
The Leading Edge (2018) 37 (6): 468–470.
DOI: https://doi.org/10.1190/tle37060468.1
... to the audio of this signal in the Notebook, you can verify that the chirps are barely audible at normal playback speed; only by slowing the clip down can they be heard clearly. Finally, here's a volcanic “scream” — a harmonic tremor preceeding an explosive eruption at Mount Redoubt, Alaska...
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Surface textures and dynamics of the 2005 lava dome at Shiveluch volcano, Kamchatka

Michael S. Ramsey, Rick L. Wessels, Steven W. Anderson
Journal: GSA Bulletin
Published: 01 May 2012
GSA Bulletin (2012) 124 (5-6): 678–689.
DOI: https://doi.org/10.1130/B30580.1
.... , 2012 , Photogrammetric monitoring of lava dome growth during the 2009 eruption of Redoubt volcano : Journal of Volcanology and Geothermal Research , doi:10.1016/j.jvolgeores.2011.12.00 . Dirksen O. Humphreys M.C.S. Pletchov P. Melnik O. Demyanchuk Y. Sparks R.S.J...
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