Peter M Powers, PhD

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January 21, 2020

Evaluation of ground‐motion models for U.S. Geological Survey seismic hazard forecasts: Hawaii tectonic earthquakes and volcanic eruptions Evaluation of ground‐motion models for U.S. Geological Survey seismic hazard forecasts: Hawaii tectonic earthquakes and volcanic eruptions

The selection and weighting of ground‐motion models (GMMs) introduces a significant source of uncertainty in U.S. Geological Survey (USGS) National Seismic Hazard Modeling Project (NSHMP) forecasts. In this study, we evaluate 18 candidate GMMs using instrumental ground‐motion observations of horizontal peak ground acceleration (PGA) and 5%‐damped pseudospectral acceleration (0.02–10 s)...

Authors

Daniel McNamara, Emily Wolin, Peter Powers, Allison Shumway, Morgan Moschetti, John Rekoske, Eric Thompson, Charles Mueller, Mark Petersen

By

Natural Hazards Mission Area, Geologic Hazards Science Center

December 11, 2019

Evaluation of ground‐motion models for U.S. Geological Survey seismic hazard models: 2018 Anchorage, Alaska, Mw 7.1 subduction zone earthquake sequence Evaluation of ground‐motion models for U.S. Geological Survey seismic hazard models: 2018 Anchorage, Alaska, Mw 7.1 subduction zone earthquake sequence

Instrumental ground‐motion recordings from the 2018 Anchorage, Alaska (⁠Mw 7.1), earthquake sequence provide an independent data set allowing us to evaluate the predictive power of ground‐motion models (GMMs) for intraslab earthquakes associated with the Alaska subduction zone. In this study, we evaluate 15 candidate GMMs using instrumental ground‐motion observations of peak ground...

Authors

Daniel McNamara, Emily Wolin, Peter Powers, Allison Shumway, Morgan Moschetti, John Rekoske, Eric Thompson, Charles Mueller, Mark Petersen

By

Natural Hazards Mission Area, Geologic Hazards Science Center

November 28, 2019

The 2018 update of the US National Seismic Hazard Model: Overview of model and implications The 2018 update of the US National Seismic Hazard Model: Overview of model and implications

During 2017–2018, the National Seismic Hazard Model for the conterminous United States was updated as follows: (1) an updated seismicity catalog was incorporated, which includes new earthquakes that occurred from 2013 to 2017; (2) in the central and eastern United States (CEUS), new ground motion models were updated that incorporate updated median estimates, modified assessments of the...

Authors

Mark Petersen, Allison Shumway, Peter Powers, Charles Mueller, Morgan Moschetti, Arthur Frankel, Sanaz Rezaeian, Daniel McNamara, Nico Luco, Oliver Boyd, Kenneth Rukstales, Kishor Jaiswal, Eric Thompson, Susan Hoover, Brandon Clayton, Edward H. Field, Yuehua Zeng

By

Natural Hazards Mission Area, Geologic Hazards Science Center

November 20, 2019

Ground-motion amplification in Cook Inlet region, Alaska from intermediate-depth earthquakes, including the 2018 MW=7.1 Anchorage earthquake Ground-motion amplification in Cook Inlet region, Alaska from intermediate-depth earthquakes, including the 2018 MW=7.1 Anchorage earthquake

We measure pseudospectral and peak ground motions from 44 intermediate‐depth Mw≥4.9 earthquakes in the Cook Inlet region of southern Alaska, including those from the 2018 Mw 7.1 earthquake near Anchorage, to identify regional amplification features (⁠0.1–5  s period). Ground‐motion residuals are computed with respect to an empirical ground‐motion model for intraslab subduction...

Authors

Morgan Moschetti, Eric Thompson, John Rekoske, Mike Hearne, Peter Powers, Daniel McNamara, Carl Tape

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

April 30, 2019

Evaluation of ground motion models for USGS seismic hazard forecasts: Induced and tectonic earthquakes in the Central and Eastern U.S. Evaluation of ground motion models for USGS seismic hazard forecasts: Induced and tectonic earthquakes in the Central and Eastern U.S.

Ground motion model (GMM) selection and weighting introduces a significant source of uncertainty in United States Geological Survey (USGS) seismic hazard models. The increase in moderate moment magnitude induced earthquakes (Mw 4 to 5.8) in Oklahoma and Kansas since 2009, due to increased wastewater injection related to oil and gas production (Keranen et al., 2013; 2014; Weingarten et al...

Authors

Daniel McNamara, Mark Petersen, Eric Thompson, Peter Powers, Allison Shumway, Susan Hoover, Morgan Moschetti, Emily Wolin

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center, Earthquake Science Center

December 31, 2018

Preliminary 2018 national seismic hazard model for the conterminous United States Preliminary 2018 national seismic hazard model for the conterminous United States

The 2014 U.S. Geological Survey national seismic hazard model for the conterminous U.S. will be updated in 2018 and 2020 to coincide with the Building Seismic Safety Council’s Project 17 timeline for development of new building code design criteria. The two closely timed updates are planned to allow more time for the Provisions Update Committee to analyze the consequences of the hazard...

Authors

Mark Petersen, Allison Shumway, Peter Powers, Charles Mueller, Sanaz Rezaeian, Morgan Moschetti, Daniel McNamara, Eric Thompson, Oliver Boyd, Nico Luco, Susan Hoover, Kenneth Rukstales

By

Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center

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January 16, 2024

New USGS map shows where damaging earthquakes are most likely to occur in US New USGS map shows where damaging earthquakes are most likely to occur in US

USGS scientists and our partners recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.

By

Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center, Communications and Publishing

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