Results 31 to 40 of about 910 (180)

Pervasive Foreshock Activity Across Southern California

Geophysical Research Letters, 2019
Foreshocks have been documented as preceding less than half of all mainshock earthquakes. These observations are difficult to reconcile with laboratory earthquake experiments and theoretical models of earthquake nucleation, which both suggest that ...
Daniel T. Trugman, Zachary E. Ross
doaj   +1 more source

Observation of a Synchronicity between Shallow and Deep Seismic Activities during the Foreshock Crisis Preceding the Iquique Megathrust Earthquake

Seismica, 2023
We analyze at a broad spatial scale the slab seismicity during one of the longest and best recorded foreshock sequence of a subduction earthquake to date: the M8.1 2014 Iquique earthquake in Chile.
Michel Bouchon, Stéphane Guillot, David Marsan, Anne Socquet, Jorge Jara, François Renard   +5 more
doaj   +1 more source

The evolution process between the earthquake swarm beneath the Noto Peninsula, central Japan and the 2024 M 7.6 Noto Hanto earthquake sequence

Earthquake Research Advances
Several physical mechanisms of earthquake nucleation, such as pre-slip, cascade triggering, aseismic slip, and fluid-driven models, have been proposed.
Zhigang Peng, Xinglin Lei, Qing-Yu Wang, Dun Wang, Phuc Mach, Dongdong Yao, Aitaro Kato, Kazushige Obara, Michel Campillo   +8 more
doaj   +1 more source

A Struggled Rupture Initiation of the Mw 6.1 2009 L’Aquila Earthquake

Geophysical Research Letters, 2023
Understanding under which physical conditions large earthquakes begin, is a key question in Earth science. Laboratory experiments and numerical models have shown that earthquake nucleation has distinct phases: a quasi‐static and an acceleration stage ...
Leoncio Cabrera, Piero Poli
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Nucleation and Cascade Features of Earthquake Mainshock Statistically Explored from Foreshock Seismicity

Entropy, 2019
The relation between the size of an earthquake mainshock preparation zone and the magnitude of the forthcoming mainshock is different between nucleation and domino-like cascade models.
Masashi Kamogawa, Kazuyoshi Z. Nanjo, Jun Izutsu, Yoshiaki Orihara, Toshiyasu Nagao, Seiya Uyeda   +5 more
doaj   +1 more source

New Physical Implications From Revisiting Foreshock Activity in Southern California

Geophysical Research Letters, 2023
Foreshock analysis promises new insights into the earthquake nucleation process and could potentially improve earthquake forecasting. Well‐performing clustering models like the Epidemic‐Type Aftershock Sequence (ETAS) model assume that foreshocks and ...
Ester Manganiello, Marcus Herrmann, Warner Marzocchi   +2 more
doaj   +1 more source

Fluid‐induced slip on a rate‐and‐state fault during co‐ and post‐injection: The interplay of fluid pressure diffusion and poroelastic stress

Deep Underground Science and Engineering, EarlyView.
Fault slip can occur ahead of the injection pressure front due to poroelastic stress. Our model captures the interaction of pressure, stress, and friction, providing new insights into injection‐induced seismicity and post‐injection fault slip. Shut‐in operations can either mitigate or accelerate seismic events depending on fault conditions and ...
Qifeng Xie, Lei Wang, Qi Li
wiley   +1 more source

Evidence of Localized Failure Along Altered Basaltic Blocks in Tectonic Mélange at the Updip Limit of the Seismogenic Zone: Implications for the Shallow Slow Earthquake Source

Geochemistry, Geophysics, Geosystems, 2020
Field studies have led to several interpretations on the mechanics behind slow earthquake phenomena downdip of the seismogenic zone. To date, field studies have not examined the shallow subduction interface which may also host slow earthquake phenomena ...
Noah John Phillips, Ginta Motohashi, Kohtaro Ujiie, Christie D. Rowe   +3 more
doaj   +1 more source

Probabilistic prediction of rate‐dependent rock strength using natural gradient boosting and Gaussian process regression

Deep Underground Science and Engineering, EarlyView.
Probabilistic natural gradient boosting and Gaussian process regression models accurately predict rate‐dependent rock strength across lithologies. Static strength and strain rate dominate, while geometric factors have minimal influence, enabling interpretable and uncertainty‐aware predictions for dynamic geomechanical applications. Abstract The dynamic
Hadi Fathipour‐Azar
wiley   +1 more source