Publications
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Detecting earthquakes in noisy real-time GNSS data with deep learning for improved PGD magnitude estimation Detecting earthquakes in noisy real-time GNSS data with deep learning for improved PGD magnitude estimation
To disseminate accurate and useful warnings, earthquake early warning (EEW) systems must quickly determine the size and location of an earthquake to estimate expected shaking. Traditional seismic‐based algorithms tend to underestimate the true magnitudes of large earthquakes, a phenomenon known as magnitude saturation. This limitation motivated the recent inclusion of Global Navigation...
Authors
Sydney N. Dybing, Diego Melgar, Amanda M. Thomas, Dara Elyse Goldberg, David Mencin, Brendan W. Crowell
Development of liquefaction-targeted design basis in U.S. seismic provisions Development of liquefaction-targeted design basis in U.S. seismic provisions
Seismic design criteria for new buildings in the United States have historically focused on life safety performance objectives through minimizing the potential for structural collapse. Development of design criteria to meet this performance objective has evolved over time, leading to the current, risk-targeted maximum considered earthquake (MCER) design basis. Corresponding MCER seismic...
Authors
Andrew James Makdisi, Steven L. Kramer, Patrick Bassal, Brett W. Maurer, Bill Perkins, Donald G. Anderson, C. B. Crouse, Shideh Dashti, David Teague
High‐resolution surface deformation and slip distribution observations for the 2023 Kahramanmaraş, Türkiye, earthquake sequence help constrain the rupture process High‐resolution surface deformation and slip distribution observations for the 2023 Kahramanmaraş, Türkiye, earthquake sequence help constrain the rupture process
Splay, or branch, faults are a common geometric feature of earthquake surface ruptures and may provide constraints on the rupture behavior of an earthquake. The 2023 Mw 7.8 Pazarcık and Mw 7.5 Elbistan, Türkiye, earthquakes are examples of ruptures with multiple small splays, and the Pazarcık earthquake nucleated on a splay fault, the Narlı fault, before rupturing bilaterally on the East...
Authors
Nadine G. Reitman, M. Morow Tan, Paula Madeline Burgi, Alexandra Elise Hatem, Christopher B. DuRoss, Richard W. Briggs
Preface to the focus section on environmental seismology Preface to the focus section on environmental seismology
No abstract available.
Authors
Liam Toney, Robert E. Anthony, Michael G. Baker, Thomas Hudson, Zhichao Shen
Landslide volume estimation from seismic waveform features using a global catalog of seismogenic events Landslide volume estimation from seismic waveform features using a global catalog of seismogenic events
Seismic waves generated by large, rapid landslides encode information about the source and can be analyzed rapidly following an event. Even remote landslides can pose hazards to downstream communities, so rapid detection and characterization using existing seismic monitoring networks could be beneficial. In this study, we expand on past regionally limited work by presenting a globally...
Authors
Elaine A. Collins, Kate E. Allstadt, Liam Toney
An improved empirical model for predicting postfire debris-flow volume in the western United States An improved empirical model for predicting postfire debris-flow volume in the western United States
Reliable estimates of debris-flow volume can be used to help predict the magnitude of debris-flow hazards following wildfire in the western United States. In this study, we compiled and used a database of 227 postfire debris-flow volumes that were collected across the western United States to develop a multiple linear regression model for predicting postfire debris-flow volume. We...
Authors
Alexander Nicholas Gorr, Francis K. Rengers, Katherine R. Barnhart, Matthew A. Thomas, Jason W. Kean
A 481 m-high landslide-tsunami in a cruise ship-frequented Alaska fjord A 481 m-high landslide-tsunami in a cruise ship-frequented Alaska fjord
Early in the morning of 10 August 2025, a >64 × 106–cubic meter landslide struck Tracy Arm fjord in Alaska. The landslide was preconditioned by glacial retreat caused by climate change. The resulting 481-meter runup megatsunami followed an initial 100-meter-high breaking wave traveling at >70 meters per second. The landslide was preceded by several days of microseismicity, which...
Authors
Dan H. Shugar, Katherine R. Barnhart, Mira Berdahl, Jacqueline Caplan-Auerbach, Göran Ekström, Aram Fathian, M. Geertsema, Stephen P. Hicks, Bretwood Higman, Erin K. Jensen, Ezgi Karasozen, Patrick J. Lynett, John J. Lyons, Thomas Monahan, Gerard H. Roe, Kristian Svennevig, Liam Toney, Maximillian Van Wyk de Vries, Michael E. West
The United States Magnetotelluric Array and the National Impedance Map The United States Magnetotelluric Array and the National Impedance Map
The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long-period magnetotelluric stations covering the entirety of the contiguous United States on a quasi-regular 70 km grid. Funding across multiple federal agencies was critical to sustaining this effort to its completion. Important components of the project included...
Authors
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andy Frassetto, Benjamin S. Murphy
Asynchronous landslide seasonality across the United States Asynchronous landslide seasonality across the United States
Mid-range landslide outlooks can facilitate weather-related landslide preparedness and disaster response planning, but seasonal landslide activity remains poorly quantified at continental scales. Leveraging >55,000 reported landslides from across the United States (U.S.), we used circular statistics to quantify landslide seasonality in 67 National Weather Service County Warning Areas...
Authors
Lisa Victoria Luna, Benjamin B. Mirus, Brian D. Collins, Jonathan P. Perkins
2025 USGS National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands: Overview of model and hazard results 2025 USGS National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands: Overview of model and hazard results
The U.S. Geological Survey recently updated the National Seismic Hazard Model (NSHM) for Puerto Rico and the U.S. Virgin Islands (PRVI). The first version of the PRVI NSHM was released in 2003, and therefore this 2025 update includes over 20 years of new geologic, geophysical, and engineering data, methods, and models. Updates follow similar efforts performed in the recent 2023 50-state...
Authors
Allison M. Shumway, Kevin Ross Milner, Peter M. Powers, Morgan P. Moschetti, Jason M. Altekruse, Julie A. Herrick, Andrea L. Llenos, Kyle B. Withers, Edward H. Field, Brad T. Aagaard, Richard W. Briggs, Alexandra Elise Hatem, Kirstie Lafon Haynie, Andrew J. Michael, Jessica A. Thompson Jobe, Kishor S. Jaiswal, Brandon S. Clayton, Nico Luco, Mark D. Petersen, Sanaz Rezaeian, Thomas L. Pratt, Yuehua Zeng
Surface rupture and slip distribution of the 2025 Mw7.7 Mandalay earthquake and updated length scaling of supershear earthquakes Surface rupture and slip distribution of the 2025 Mw7.7 Mandalay earthquake and updated length scaling of supershear earthquakes
The 2025 Mw 7.7 Mandalay, Burma (Myanmar), earthquake ruptured 475 km of the central Sagaing fault and is the longest continental strike-slip rupture on record. The observed rupture length is 1.6–4.7 times the value expected (100–300 km) from existing length-magnitude scaling relations for strike-slip earthquakes. The earthquake resulted from shallow dextral faulting and ruptured...
Authors
Nadine G. Reitman, Yuanshi Wang, Yu-Ting Kuo, Catherine Elise Hanagan, Alexandra Elise Hatem, Christopher B. DuRoss, Chun-Chi Chen, Dara Elyse Goldberg, Harriet Zoe Yin, Richard W. Briggs, Jessica A. Thompson Jobe, Sylvia R. Nicovich, Emerson Madelyn Lynch, Joseph Hoss Powell, William D. Barnhart, Robert G. Schmitt
Ground-motion characterization for the 2025 U.S. National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands Ground-motion characterization for the 2025 U.S. National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands
We develop the ground-motion characterization (GMC) for the 2025 U.S. National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands (NSHM-PRVI) for earthquakes in active crustal, subduction interface, and subduction intraslab regimes. Using ground-motion models (GMMs) from the Next-Generation Attenuation (NGA)-West2 and NGA-Subduction projects, the GMC is parameterized by...
Authors
Morgan P. Moschetti, Brad T. Aagaard, Kyle B. Withers, Kevin Ross Milner, Jason M. Altekruse, Julie A. Herrick, Peter M. Powers, Sanaz Rezaeian, Allison M. Shumway, William J. Stephenson