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@seismosocam.bsky.social Sep 12, 2026, 9:00 PM

A physics-based simulation of the 1905 Kangra earthquake, which uses a new 3D crustal velocity model, finds ground-motion amplification for the Siwalik basin. #BSSA ⚒️

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Seismotectonic map for the study region, the northwestern Indian Himalaya and Siwalik basin (75.5°–79.5° E to 29.5°–33.5° N). The red lines mark primary faults. The blue represents the region of the Siwalik basin, the Siwalik Himalayas by the light‐green color, the Lesser Himalayas by the yellow color, and the Higher Himalayas by the gray color. The stars represent epicenters of past earthquakes from the India Meteorological Department catalog. The epicenter locations of the 1905 Kangra and 1975 Kinnaur earthquakes are shown as red stars. The inset globe on the top left shows the study region.

@seismosocam.bsky.social Sep 12, 2026, 3:01 PM

3D Ground‐Motion Simulation‐Based Site Amplification Considering Multiple Basin Geometries: A Wellington, New Zealand, Case Study #BSSA ⚒️

These simulations capture spectral amplification trends at deep basin sites better than for shallow basin sites.

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Map showing the locations of the six earthquake sources and ground‐motion recording stations considered in this study.

@seismosocam.bsky.social Sep 10, 2026, 3:01 PM

🌟 OPEN ACCESS 🌟 Limited Dynamic Earthquake Triggering in Nevada #BSSA ⚒️

Focusing on the span from 2008 to 2023, scientists identified 94 dynamically triggered earthquakes concentrated in four distinct regions in Nevada.

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The left panel shows teleseismic earthquakes (greater than or equal to magnitude 7.0) from January 1, 2008 to December 31, 2023 are represented by circles. The size of each circle corresponds to earthquake magnitude, whereas the fill color indicates the earthquake’s depth range. The study area in Nevada is highlighted by the green square, and the asterisks mark the nine teleseismic triggering events. The right panel shows local earthquakes (less than or equal to magnitude 5.0) in the study area that occurred within the same duration of teleseismic event mapped in left panel.

@seismosocam.bsky.social Sep 10, 2026, 3:00 AM

In a new #BSSA paper, scientists investigate the strong ground motion attenuation characteristics of the Sichuan basin using densely distributed data from ten recent moderate-to-large earthquakes. ⚒️

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Tectonic settings of the study regions and the spatial distribution of the stations in our dataset. The translucent shaded area outlines the area of the Sichuan basin. ANHF, Anninghe fault; DLSF, Daliangshan fault; LMSF, Longmenshan fault; MBYJF, Mabian–Yanjin fault; MEMS, microelectromechanical system; XSHF, Xianshuihe fault; and ZMHF, Zemuhe fault.

@seismosocam.bsky.social Sep 9, 2026, 9:01 PM

🌟 OPEN ACCESS 🌟 In a new #BSSA paper, scientists use a dataset of past Alaska earthquakes to test the performance of the EPIC algorithm used in earthquake early warning. ⚒️

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Initial magnitude error as a function of station density for all matched Alaska test suite events.

@seismosocam.bsky.social Sep 7, 2026, 3:01 PM

🌟 OPEN ACCESS 🌟 Systematic Estimation of Earthquake Source Parameters for Continental Australia: Magnitude Conversions and Ground‐Motion Variability #BSSA ⚒️

The relationship between local and moment magnitude for Australian earthquakes is dependent on stress drop.

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Stress drop plotted against local magnitude on the left panel and against the Brune moment magnitude on the right panel.

@seismosocam.bsky.social Sep 7, 2026, 3:00 AM

🌟 OPEN ACCESS 🌟 Divide and conquer, says a new #BSSA paper! In this work, a team addresses how to simulate complex fault networks in a fully dynamic way. ⚒️

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$Schematic representation of a fractured domain composed of pre‐existing planar faults arbitrarily oriented in space.$

@seismosocam.bsky.social Sep 6, 2026, 9:01 PM

Scientists succeed in distinguishing small earthquakes from explosions and mining events in Utah. But telling apart explosions from mining events proves tricky. Find out more, in #BSSA ⚒️

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