Results 131 to 140 of about 30,472 (270)

Suitability of Ground‐Motion Models for Seismic Hazard Assessments in Puerto Rico and the US Virgin Islands

Earthquake Spectra, Volume 42, Issue 2, May 2026.
We perform linear mixed‐effects analyses with a ground‐motion dataset to evaluate how well ground‐motion models (GMMs) fit active crustal, subduction interface, and subduction intraslab earthquakes in Puerto Rico and the US Virgin Islands. Most of the GMMs reproduce the spatial variation in peak ground motions with earthquake magnitude and rupture ...
Brad T. Aagaard, Morgan P. Moschetti, Kyle B. Withers   +2 more
wiley   +1 more source

World Seismic Networks and Earthquake Catalogs

Russian Journal of Earth Sciences
This paper is devoted to the review of currently functioning seismological agencies, seismic monitoring networks created, developed and supported by them, as well as earthquake catalogs produced. Particular attention is focused on international and national seismological centers and seismic networks.
Alexei Gvishiani, B. Dzeranov, Anna Skorkina, Boris Dzeboev   +3 more
openaire   +2 more sources

OpenAmp: An Open‐Source Site Amplification Database to Unlock the Potential of Machine Learning

Earthquake Spectra, Volume 42, Issue 2, May 2026.
OpenAmp is an open‐source, consistently curated, high‐quality database of earthquake site amplification functions derived from instrumental recordings, accompanied by a comprehensive suite of site metadata, for 1,742 K‐NET and KiK‐net observation sites in Japan.
Chuanbin Zhu, Dong‐youp Kwak, Marco Pilz, Annabel Haendel, Junju Xie, Hiroshi Kawase, Fabrice Cotton   +6 more
wiley   +1 more source

Thousands of Induced Earthquakes per Month in West Texas Detected Using EQCCT

Geosciences
West Texas has been a seismically active region in the past decade due to the injection of industrial wastewater and hydrocarbon exploitation. The newly founded Texas seismological network has provided a catalog that characterizes the intense seismicity ...
Yangkang Chen, Alexandros Savvaidis, Omar M. Saad, Daniel Siervo, Guo-Chin Dino Huang, Yunfeng Chen, Iason Grigoratos, Sergey Fomel, Caroline Breton   +8 more
doaj   +1 more source

2025 U.S. Geological Survey National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands: Overview of Model and Hazard Results

Earthquake Spectra, Volume 42, Issue 2, May 2026.
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.
Allison M. Shumway, Kevin R. 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 E. Hatem, Kirstie L. Haynie, Andrew J. Michael, Jessica A. Thompson Jobe, Kishor S. Jaiswal, Brandon S. Clayton, Nicolas Luco, Mark D. Petersen, Sanaz Rezaeian, Thomas L. Pratt, Yuehua Zeng   +21 more
wiley   +1 more source

A Performance‐Based Earthquake Fatality Modeling Framework Using Collapse Volume Ratios

Earthquake Spectra, Volume 42, Issue 2, May 2026.
Conventional earthquake fatality models are commonly implemented using a binary representation of building collapse, an assumption that overlooks severe failure modes and systematically underestimates fatalities. To address this limitation, this study advances the collapse volume ratio—a continuous metric quantifying the reduction of survivable space ...
Luis Ceferino, Yinchen Yi, Wenxiao Li, Yvonne Merino, Luis Moya, Kimberley Shoaf, Emily So   +6 more
wiley   +1 more source

Probabilistic Seismic Hazard Assessment of Lisbon (Portugal)

GeoHazards
The 1755 Lisbon earthquake holds significant historical importance in Portuguese history. The subsequent tsunami resulted in extensive destruction and damage, affecting not only Lisbon but also other regions of Portugal, Spain, and North Africa.
Büşra Gögen, Shaghayegh Karimzadeh, Paulo B. Lourenço   +2 more
doaj   +1 more source

Evaluation of Earthquake‐Induced Slope Displacements in Greater Vancouver Based on Probabilistic Framework and Using NBCC 2020 and EqDisp Code Platform

Earthquake Spectra, Volume 42, Issue 2, May 2026.
Engineers frequently use simplified seismic slope displacement procedures to evaluate the performance of earth structures and natural slopes. Current practices typically adopt Newmark‐type and semi‐empirical seismic displacement prediction models (SDPMs) to estimate the seismic slope displacements (D) based on ground motion intensity measures at a ...
Ali Fallah Yeznabad, Karen Assatourians, Hesham El Naggar, Sheri Molnar   +3 more
wiley   +1 more source

Computerized earthquake catalog developed in California

Eos, Transactions American Geophysical Union, 1977
A computerized earthquake catalog system that integrates basic information on all earthquakes reported in California has been developed by that state's Division of Mines and Geology. The system provides for file generation and maintenance and for data retrieval. Earthquake records can be selected according to magnitude, date of occurrence, geographical
openaire   +1 more source

Near‐Source Ground Motion From Normal Faults: Insights From the Physics‐Based Numerical Simulations of the 1980 Irpinia Earthquake, Southern Italy

Earthquake Spectra, Volume 42, Issue 2, May 2026.
In this paper, the physics‐based numerical simulation of the strongest instrumental earthquake in the recent seismic history of Italy, i.e., the Nov 23, 1980 Irpinia earthquake in Southern Italy, with magnitude MW 6.8, is presented and discussed. A 3D spectral element model covering an extended region (147 × 110 km2) was constructed, with a frequency ...
Roberto Paolucci, Chiara Smerzini, Manuela Vanini, Ilario Mazzieri, Victor M. Hernández‐Aguirre, Luigi Vadacca   +5 more
wiley   +1 more source