Publications
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The 2016 Lamplugh rock avalanche, Alaska: Deposit structures and emplacement dynamics The 2016 Lamplugh rock avalanche, Alaska: Deposit structures and emplacement dynamics
Supraglacial landslides result from the catastrophic failure of periglacial rock slopes and deposit large volumes of rock and ice onto the glacier surface. The most remarkable features of these landslides are their prominent long flowbands and a high mobility that exceeds that of their counterparts in other environments. Based on field surveys, high-resolution digital elevation models...
Authors
A. Dufresne, G. Wolken, C Hibert, Erin Bessette-Kirton, Jeffrey A. Coe, M. Geertsema, G Ekström
The effect of stress changes on time-dependent earthquake probabilities for the central Wasatch Fault Zone, Utah, USA The effect of stress changes on time-dependent earthquake probabilities for the central Wasatch Fault Zone, Utah, USA
Static and quasi-static Coulomb stress changes produced by large earthquakes can modify the probability of occurrence of subsequent events on neighboring faults. This approach is based on physical (Coulomb stress changes) and statistical (probability calculations) models, which are influenced by the quality and quantity of data available in the study region. Here, we focus on the Wasatch...
Authors
A. Verdecchia, S. Carena, B. Pace, Christopher B. DuRoss
Natural hazards and mineral commodity supply: Quantifying risk of earthquake disruption to South American copper supply Natural hazards and mineral commodity supply: Quantifying risk of earthquake disruption to South American copper supply
Mineral resources, and their mining and enrichment operations, are not equally distributed across Earth. The concentration of mineral supply in certain regions, owing to the geology or geography of the mineral resource, raises the level of risk related to supply disruption. Where mineral production coincides with areas prone to natural hazards, supply may be especially at risk. However...
Authors
Emily K. Schnebele, Kishor S. Jaiswal, Nico Luco, Nedal T. Nassar
Preliminary report on engineering and geological effects of the July 2019 Ridgecrest earthquake sequence Preliminary report on engineering and geological effects of the July 2019 Ridgecrest earthquake sequence
The Ridgecrest Earthquake sequence included a foreshock event on July 4 2019 (M6.4) and a M7.1 mainshock event on July 5 2019. These events occurred in the Eastern California Shear Zone, near Indian Wells Valley, south of China Lake and west of Searles Valley. GEER has partnered with several organizations to collect perishable data and document the important impacts of these events...
Authors
Scott J Brandenberg, Pengfei Wang, Chukwuebuka C Nweke, Kenneth Hudson, Silvia Mazzoni, Yousef Bozorgnia, Kenneth W. Hudnut, Craig A. Davis, Sean K Ahdi, Farzin Zareian, Jawad Fayaz, Richard D Koehler, Colin Chupik, Ian Pierce, Alana Williams, Sinan Akciz, Martin B Hudson, Tadahiro Kishida, Benjamin A. Brooks, Ryan D. Gold, Daniel J. Ponti, Katherine M. Scharer, Devin McPhillips, Christopher B. DuRoss, Todd Ericksen, Janis Hernandez, Jay Patton, Brian Olson, Timothy E. Dawson, Jerome Treiman, Kelly Blake, Jeffrey Buchhuber, Chris L M Madugo, Joseph Sun, Andrea Donnellan, Greg Lyzenga, Erik Conway
Seismic loss and damage in light-frame wood buildings from sequences of induced earthquakes Seismic loss and damage in light-frame wood buildings from sequences of induced earthquakes
Activities related to oil and gas production, especially deep disposal of wastewater, have led to sequences of induced earthquakes in the central U.S. This study aims to quantify damage to and seismic losses for light-frame wood buildings when subjected to sequences of induced, small to moderate magnitude, events. To conduct this investigation, one and two-story multifamily wood frame...
Authors
Robert E Chase, Abbie B. Liel, Nico Luco, Bridger W Baird
Developing and testing physically based triggering thresholds for runoff‐generated debris flows Developing and testing physically based triggering thresholds for runoff‐generated debris flows
Runoff in steep channels is capable of transitioning into debris flows with hazardous implications for downstream communities and infrastructure, particularly in alpine landscapes with minimal vegetation and areas recently disturbed by wildfire. Here, we derive thresholds for the initiation of runoff‐generated debris flows based on critical values of dimensionless discharge and Shields...
Authors
Hui Tang, Luke A. McGuire, Francis K. Rengers, Jason W. Kean, Dennis M. Staley, Joel B. Smith
Improved implementation of rupture location uncertainty in fault displacement hazard assessment Improved implementation of rupture location uncertainty in fault displacement hazard assessment
This short note proposes an improvement to the implementation of uncertainty associated with rupture location from future earthquakes in probabilistic fault displacement hazard analysis. Location uncertainty leads to nonzero primary fault displacement near a mapped fault. With the improved implementation of location uncertainty, estimated fault displacement hazard at a given site is...
Authors
Rui Chen, Mark D. Petersen
Intensity and impact of the New York Railroad superstorm of May 1921 Intensity and impact of the New York Railroad superstorm of May 1921
Analysis is made of low‐latitude ground‐based magnetometer data recording the magnetic superstorm of May 1921. By inference, the storm was driven by a series of interplanetary coronal mass ejections, one of which produced a maximum pressure on the magnetopause of ~64.5 nPa, sufficient to compress the subsolar magnetopause radius to ~5.3 Earth radii. Over the course of the storm, low...
Authors
Jeffrey J. Love, Hisashi Hayakawa, Edward W. Cliver
Effects of infiltration characteristics on the spatial-temporal evolution of stability of an interstate highway embankment Effects of infiltration characteristics on the spatial-temporal evolution of stability of an interstate highway embankment
Infiltration-induced landslides are among the most common natural disasters threatening modern civilization, but conventional methods for studying the triggering mechanisms and predicting the occurrence of these slides are limited by incomplete consideration of underlying physical processes and the lack of precision inherent in limit-equilibrium analyses. To address this problem the...
Authors
Eric Hinds, Ning Lu, Benjamin B. Mirus, Alexandra Wayllace
The Teton fault The Teton fault
No abstract available.
Authors
M. S. Zellman, Christopher B. DuRoss, Glenn R. Thackray
Seismic design and hazard maps: Before and after Seismic design and hazard maps: Before and after
The 1994 Northridge earthquake generated world-record ground motions. At the time, the horizontal peak ground acceleration of 1.8 g measured by a seismometer in Tarzana was the largest ever. The same is true of the peak ground velocity of 148 cm/s measured in Granada Hills. Both measurements were within approximately 15 km of the source of the earthquake; they were also near most of the...
Authors
Nico Luco
Petrologic and mineral physics database for use with the U.S. Geological Survey National Crustal Model Petrologic and mineral physics database for use with the U.S. Geological Survey National Crustal Model
We present a petrologic and mineral physics database as part of the U.S. Geological Survey National Crustal Model (NCM). Each of 209 geologic units, 134 of which are currently part of the geologic framework within the NCM, was assigned a mineralogical composition according to generalized classifications with some refinement for specific geologic formations. This report is concerned with...
Authors
Theron A. Sowers, Oliver S. Boyd