Publications
Filter Total Items: 7487
Dendroseismological investigation of redwood trees along the North Coast section of the San Andreas Fault Dendroseismological investigation of redwood trees along the North Coast section of the San Andreas Fault
Sequoia sempervirens (coast redwood) tree rings have the potential to annually resolve late-Holocene earthquakes on the northern San Andreas Fault based on direct (e.g., physical damage) and indirect (e.g., co-seismic environmental change) impacts, but scarcity of suitable samples and challenges crossdating this long-lived species have limited progress. More precise dating of the pre...
Authors
Allyson L. Carroll, Belle E. Philibosian, Stephen C. Sillett, Marie E. Antoine, Özgür Kozaci
Factors influencing landslide occurrence in low-relief formerly glaciated landscapes: Landslide inventory and susceptibility analysis in Minnesota, USA Factors influencing landslide occurrence in low-relief formerly glaciated landscapes: Landslide inventory and susceptibility analysis in Minnesota, USA
In landscapes recently impacted by continental glaciation, landslides may occur where topographic relief has been generated by the drainage of glacial lakes and ensuing post-glacial fluvial network development into unconsolidated glacially derived sediments and exhumed bedrock. To investigate linkages among environmental variables, post-glacial landscape development, and landslides, we...
Authors
Laura Triplett, Morena N Hammer, Stephen B. DeLong, Karen B. Gran, Carrie E. Jennings, Zachary T. Engle, Julie K. Bartley, Dylan J. Blumentritt, Andy Breckenridge, Stephanie Day, Melissa A. Kohout, Philip H. Larson, Jeni A. McDermott, Emilie Richard
Geomorphological evidence of near-surface ice at candidate landing sites in northern Amazonis Planitia, Mars Geomorphological evidence of near-surface ice at candidate landing sites in northern Amazonis Planitia, Mars
This work presents geomorphological analyses of an area at the boundary between Arcadia Planitia and northern Amazonis Planitia, situated in the northern mid-latitudes of Mars. Recent studies have indicated the presence of substantial volumes of near-surface excess ice in Arcadia Planitia, making this region a promising candidate for future human and robotic exploration. This study...
Authors
Erica Luzzi, Jennifer L. Heldmann, Kaj E. Williams, Giacomo Nodjoumi, Ariel Deutsch, Alexander Sehlke
Overview of The SCEC/USGS Community Stress Drop Validation Study using the 2019 Ridgecrest earthquake sequence Overview of The SCEC/USGS Community Stress Drop Validation Study using the 2019 Ridgecrest earthquake sequence
We present initial findings from the ongoing Community Stress Drop Validation Study to compare spectral stress‐drop estimates for earthquakes in the 2019 Ridgecrest, California, sequence. This study uses a unified dataset to independently estimate earthquake source parameters through various methods. Stress drop, which denotes the change in average shear stress along a fault during...
Authors
Rachel E. Abercrombie, Annemarie S. Baltay Sundstrom, Shanna Chu, Taka’aki Taira, Dino Bindi, Oliver S. Boyd, Xiaowei Chen, Elizabeth S. Cochran, Emma Devin, Douglas Dreger, William Ellsworth, Fan Wenyuan, Rebecca Harrington, Yihe Huang, Kilian Kemna, Meichen Liu, Adrien Oth, Grace Alexandra Parker, Colin Pennington, Matteo Picozzi, Christine J. Ruhl, Peter Shearer, Daniele Spallarossa, Daniel Trugman, Ian Vandevert, Qimin Wu, Clara Yoon, Ellen Yu, Gregory C. Beroza, Tom Eulenfeld, Trey Knudson, Kevin Mayeda, Paola Morasca, James S. Neely, Jorge I. Roman-Nieves, Claudio Satriano, Mariano Supino, William R. Walter, Ralph Archuleta, Gail Marie Atkinson, Giovanna Calderoni, Chen Ji, Hongfeng Yang, Jiewen Zhang
Introduction to the special section on improving measurements of earthquake source parameters Introduction to the special section on improving measurements of earthquake source parameters
Earthquake source parameters such as magnitude, seismic moment, source dimension, stress drop, and radiated energy are fundamental to understanding earthquake physics, and are also key ingredients in earthquake ground‐motion modeling, rupture simulation, and statistical seismology. However, the uncertainties in these parameters estimated from the radiated seismic wavefield are large due...
Authors
Annemarie S. Baltay Sundstrom, Rachel E. Abercrombie, Adrien Oth, Takahiko Uchide
Utility of a swath laser rangefinder for characterizing mass movement flow depth and landslide initiation Utility of a swath laser rangefinder for characterizing mass movement flow depth and landslide initiation
Mass movements such as debris flows and landslides are some of the deadliest and most destructive natural hazards occurring mostly in alpine and volcanic settings. With ever-growing populations located downslope from known debris flow channels, early warning systems can help prevent loss of life. Geophysical and technological advances have improved monitoring and detection capabilities...
Authors
Maciej Obryk, Emily Christina Bedinger, Alexandra M. Iezzi, Emily H Bryant, Kate E. Allstadt, David L. George, Benjamin B. Mirus
Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise
Climate-driven sea-level rise is increasing the frequency of coastal flooding worldwide, exacerbated locally by factors like land subsidence from groundwater and resource extraction. However, a process rarely considered in future sea-level rise scenarios is sudden (over minutes) land subsidence associated with great (>M8) earthquakes, which can exceed 1 m. Along the Washington, Oregon...
Authors
Tina Dura, William Chilton, David Small, Andra Garner, Andrea D. Hawkes, Diego Melgar, Simon E. Engelhart, Lydia M. Staisch, Robert C. Witter, Alan Nelson, Harvey Kelsey, Jonathan Allan, David S. Bruce, Jessica DePaolis, Mike Priddy, Richard W. Briggs, Robert Weiss, SeanPaul La Selle, Michael J. Willis, Benjamin P. Horton
Destruction and transformation: Lessons learned from the 2015 Gorkha, Nepal, earthquake Destruction and transformation: Lessons learned from the 2015 Gorkha, Nepal, earthquake
No abstract available.
Authors
Surya Narayan Shrestha, Susan E. Hough
U.S. Geological Survey 2024 Rocky Mountain Region Science Exchange—Showcasing cutting-edge science to adapt to extreme weather events and stakeholder needs U.S. Geological Survey 2024 Rocky Mountain Region Science Exchange—Showcasing cutting-edge science to adapt to extreme weather events and stakeholder needs
Introduction The Rocky Mountains and the Colorado River Basin in the Western United States are complex, interconnected systems that sustain a large variety of species, including tens of millions of humans. These regions face risks from drought, wildfires, invasive plant and animal species, and habitat reduction. Working with many stakeholders, scientists can help to characterize these...
Authors
William J. Andrews, Timothy N. Titus, Lauren Ellissa Eng, Kristine L. Zellman, Patrick J. Anderson, Jeremy C Havens
Comparative properties of saponitic fault gouge and serpentinite muds cored from mud volcanoes of the Mariana subduction zone Comparative properties of saponitic fault gouge and serpentinite muds cored from mud volcanoes of the Mariana subduction zone
We obtained 12 core samples for physical and chemical characterization from three serpentinite mud volcanoes (Yinazao, Asùt Tesoru, and Fantangisña) located on the forearc of the Mariana subduction system, that were drilled during International Ocean Discovery Program Expedition 366. Two samples from the Fantangisña mud volcano are interpreted to be clay-rich fault gouges derived from...
Authors
Diane E. Moore, C.A. Morrow, David A. Lockner, Barbara A. Bekins
From hydrated silica to quartz: Potential hydrothermal precipitates found in Jezero crater, Mars From hydrated silica to quartz: Potential hydrothermal precipitates found in Jezero crater, Mars
On Earth, silica-rich phases from opal to quartz are important indicators and tracers of geological processes. Hydrated silica, such as opal, is a particularly good matrix for the preservation of molecular and macroscopic biosignatures. Cherts, a type of silica-dominated rocks, provide a unique archive of ancient terrestrial life while quartz is the emblematic mineral of the Earth's...
Authors
P.S.A. Beck, O. Beyssac, E. Dehouck, S. Bernard, M. Pineau, L. Mandon, C. Royer, E. Clave, S. Schroder, O. Forni, R. Francis, N. Mangold, C. Bedford, A. Broz, E.A. Cloutis, J.R. Johnson, F. Poulet, T. Fouchet, C. Quantin-Nataf, C. Pilorget, W. Rapin, P.-Y. Meslin, Travis S.J. Gabriel, G. Arana, J.M. Madariaga, A.J. Brown, S. Maurice, S. M. Clegg, O. Gasnault, A. Cousin, R.C. Wiens, The SuperCam Team
Seismic moment and local magnitude scales in Ridgecrest, CA from the SCEC/USGS Community Stress Drop Validation Study Seismic moment and local magnitude scales in Ridgecrest, CA from the SCEC/USGS Community Stress Drop Validation Study
We illustrate the systematic difference between moment magnitude and local magnitude caused by underlying earthquake source physics, using seismic moments submitted to the Statewide California Earthquake Center/United States Geological Survey Community Stress Drop Validation Study 2019 Ridgecrest data set. While the relationship between seismic moment and moment magnitude ( M or Mw) of...
Authors
Annemarie S. Baltay Sundstrom, Rachel E. Abercrombie