scholarly journals Glacial Earthquakes and Precursory Seismicity Associated With Thwaites Glacier Calving

2020 ◽  
Vol 47 (3) ◽  
Author(s):  
J. Paul Winberry ◽  
Audrey D. Huerta ◽  
Sridhar Anandakrishnan ◽  
Richard C. Aster ◽  
Andrew A. Nyblade ◽  
...  
Keyword(s):  
Precursory Seismicity

scholarly journals Precursory seismicity associated with frequent, large ice avalanches on Iliamna volcano, Alaska, USA

2007 ◽  
Vol 53 (180) ◽  
pp. 128-140 ◽  
Author(s):  
Jacqueline Caplan-Auerbach ◽  
Christian Huggel
Keyword(s):  
Geothermal Energy ◽  
Source Region ◽  
Thermal Conditions ◽  
Seismic Signal ◽  
Seismic Sequence ◽  
Ground Shaking ◽  
Repeating Earthquakes ◽  
Rock Interface ◽  
Precursory Seismicity ◽  
Time Of Failure

AbstractSince 1994, at least six major (volume >106m3) ice and rock avalanches have occurred on Iliamna volcano, Alaska, USA. Each of the avalanches was preceded by up to 2 hours of seismicity believed to represent the initial stages of failure. Each seismic sequence begins with a series of repeating earthquakes thought to represent slip on an ice–rock interface, or between layers of ice. This stage is followed by a prolonged period of continuous ground-shaking that reflects constant slip accommodated by deformation at the glacier base. Finally the glacier fails in a large avalanche. Some of the events appear to have entrained large amounts of rock, while others comprise mostly snow and ice. Several avalanches initiated from the same source region, suggesting that this part of the volcano is particularly susceptible to failure, possibly due to the presence of nearby fumaroles. Although thermal conditions at the time of failure are not well constrained, it is likely that geothermal energy causes melting at the glacier base, promoting slip and culminating in failure. The frequent nature and predictable failure sequence of Iliamna avalanches makes the volcano an excellent laboratory for the study of ice avalanches. The prolonged nature of the seismic signal suggests that warning may one day be given for similar events occurring in populated regions.

A statistical damage model with implications for precursory seismicity

2011 ◽  
Vol 60 (3) ◽  
pp. 638-663
Author(s):  
Ya-Ting Lee ◽  
Donald L. Turcotte ◽  
John B. Rundle ◽  
Chien-Chih Chen
Keyword(s):  
Damage Model ◽  
Precursory Seismicity ◽  
Statistical Damage

Precursory seismicity in regions of low strain rate: insights from a physics-based earthquake simulator

2017 ◽  
Vol 209 (3) ◽  
pp. 1513-1525 ◽  
Author(s):  
Annemarie Christophersen ◽  
David A. Rhoades ◽  
Harmony V. Colella
Keyword(s):  
Strain Rate ◽  
Earthquake Simulator ◽  
Precursory Seismicity ◽  
Low Strain Rate

scholarly journals Analysis of precursory seismicity patterns in Zagros (Iran) by CN algorithm

2014 ◽  
Vol 23 ◽  
pp. 91-99 ◽  
Author(s):  
Majid MAYBODIAN ◽  
Mehdi ZARE ◽  
Hosseyn HAMZEHLOO ◽  
Antonella PERESAN ◽  
Anooshiravan ANSARI ◽  
...  
Keyword(s):  
Seismicity Patterns ◽  
Cn Algorithm ◽  
Precursory Seismicity

Precursory seismicity of the 1994 eruption of Popocatépetl Volcano, Central Mexico

2008 ◽  
Vol 70 (6) ◽  
pp. 753-767 ◽  
Author(s):  
Servando De la Cruz-Reyna ◽  
Izumi Yokoyama ◽  
Alicia Martínez-Bringas ◽  
Esteban Ramos
Keyword(s):  
Central Mexico ◽  
Popocatépetl Volcano ◽  
Precursory Seismicity ◽  
Popocatepetl Volcano
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