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earthquakes

Three images showing the study area from different perspectives.
Posted inEditors' Highlights

Probing the Sedimentology of a Continental Megathrust

by Peter van der Beek 6 September 202222 December 2022

Detailed analysis of sediments covering the Main Frontal Thrust in Nepal show how climate-driven baselevel changes affect sedimentation and should be considered when inferring thrust activity.

A small coastal shipping town in Japan is devastated by an earthquake. In this photo taken from a plane, the wreckage of hundreds of buildings can be seen, and only a handful remain standing. In the center of the image, a small yacht is perched on top of one of the only remaining buildings. The town is surrounded by mountains and forests. One of the plane’s wheels is visible in the lower left corner of the image.
Posted inResearch Spotlights

Months of Gravity Changes Preceded the Tōhoku Earthquake

Sarah Derouin, Science Writer by Sarah Derouin 1 September 202225 October 2022

Using GRACE satellite data, researchers discovered anomalous gravimetric signals that occurred before a seismic event that started deep within Earth.

A global map of subduction zones. The Mariana Trench is near the center with a zoomed-in image of bathymetry.
Posted inResearch Spotlights

Deep Earthquakes Suggest Well-Hydrated Mariana Subduction Zone

by Morgan Rehnberg 10 August 20222 March 2023

Earthquakes as deep as 50 kilometers below the seafloor were detected by 12 ocean bottom seismometers placed around the Challenger Deep.

Two maps of the study region displaying earthquake depth as colored dots.
Posted inEditors' Highlights

Aftershocks Reveal Coseismic Rupture of Megathrust Earthquakes

by Agnes Helmstetter 28 July 202221 September 2022

More accurate aftershock zones reveal that the rupture areas of megathrust Aleutian–Alaska earthquakes are larger than we thought and partly overlap, in contradiction with the seismic gap hypothesis.

A map and 3 graphs showing the waveform fits for an earthquake.
Posted inEditors' Highlights

Western US Adjoint Tomography Reproduces Waveform Complexity

by Michael Bostock 22 July 202222 December 2022

Adjoint tomography employing 3D wavefield simulations for 72 well recorded regional earthquakes in the western U.S. yields spectacular improvements to waveform fits.

Four-paneled figure, with the upper right panel showing Today Show coverage, with both the initial question directed to the @USGSVolcanoes Twitter account from user @JayFurr, “Is it safe to roast marshmallows over volcanic vents?” and the response, “Erm…we’re going to have to say no.” The upper left panel shows CNN coverage with an image of the eruption and the headline “USGS: ‘Please don’t roast marshmallows over lava.’” The lower left panel shows MSNCB coverage, which shows only the initial tweet. The lower right panel shows MSNBC’s parody of the NBC public service announcement graphic, in which, against the background of space filled with stars, the purple words “The S’more You Know” are underlined by a yellow shooting star.
Posted inNews

Roosters, S’mores, and #EmergencyCute: A Humor-in-Crisis How-To

by Alka Tripathy-Lang 15 July 202227 March 2023

When natural hazards strike communities, we may not think science agencies should respond with humor. Researchers suggest that sometimes, however, humor can connect communities and bring smiles.

Aerial photo of San Andreas Fault.
Posted inResearch Spotlights

How Land Deformation Occurs When Fault Sections Creep

Sarah Derouin, Science Writer by Sarah Derouin 1 July 20221 July 2022

Using a physical experiment, researchers show how off-fault deformation occurs along strike-slip faults with different types of motion.

Esquema algoritmo de aprendizaje para estimar las magnitudes de terremotos sobre la base de señales de elastogravidad rápida.
Posted inNews

Monitoreando terremotos a la velocidad de la luz

by Mohammed El-Said 30 June 202230 June 2022

Nueva investigación utiliza la gravedad y un modelo de aprendizaje automático para estimar instantáneamente la magnitud y ubicación de grandes terremotos.

A street in Guthrie, Okla.
Posted inResearch Spotlights

Understanding Earthquakes Triggered by Wastewater Injection

Sarah Stanley, Science Writer by Sarah Stanley 27 June 202227 June 2022

A deep dive into a 2015 Oklahoma earthquake reveals new insights into the dynamics of quakes induced by wastewater injection, and could help inform future earthquake hazard modeling.

例如断层蠕变正在使加州大学伯克利分校的体育场墙壁产生变形。
Posted inResearch Spotlights

地震建模专家联合行动比较和改进模型编码

Sarah Stanley, Science Writer by Sarah Stanley 24 June 202224 June 2022

国际社会推动的努力为断层滑动模拟提供了信心,同时突出了其中的关键差异。

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

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