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Is there accelerated crustal deformation before large earthquakes? A case study of strong intra-plate earthquakes in ChinaKey points

Earthquake Science
The existence of a detectable precursory phase of fault slip preceding major earthquakes has been a subject of ongoing debate for decades. A recent study (Bletery and Nocquet, 2023) demonstrated exponential acceleration of fault slip prior to large ...
Chengyang Zhang, Ke Jia, Haohao Wang, Ming Hao   +3 more
doaj   +1 more source

On the electric field transient anomaly observed at the time of the Kythira M=6.9 earthquake on January 2006 [PDF]

Natural Hazards and Earth System Sciences, 2007
The study of the Earth's electromagnetic fields prior to the occurrence of strong seismic events has repeatedly revealed cases were transient anomalies, often deemed as possible earthquake precursors, were observed on electromagnetic field recordings of ...
M. R. Varley, F. Vallianatos, J. P. Makris, A. Konstantaras   +3 more
doaj  

Adsorption Preceding Wetting Front Controls Seismic Velocity

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Rock elasticity varies with both humidity and water saturation, yet their combined effects remain poorly understood, although in nature vapor adsorption and liquid infiltration occur simultaneously. Here, we present experimental data of P‐wave velocity and volume expansion in a free‐standing sandstone subject to progressive wetting.
Rui Wu, Hongpu Kang, Fuqiang Gao, Xiangyuan Peng, Shuangyong Dong, Chenxi Zhao, Bing Qiuyi Li, Kerry Leith, Qinghua Lei, Gennady Y. Gor, Paul A. Selvadurai, Xiaoping Jia   +11 more
wiley   +1 more source

Hydraulic Control of the Foreshocks and Mainshock of the 2017 Valparaíso, Chile, Earthquake

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Slow‐slip events (SSE) are a key mode of aseismic deformation and can enhance fault permeability through fracturing, enabling fluid migration from the overpressured oceanic crust to the plate interface. Whether the resulting poroelastic stress changes promote seismicity and larger megathrust events, however, remains unclear.
Carlos Peña, Leoncio Cabrera, Jesús Muñoz‐Montecinos, Sergio Ruiz, Oliver Heidbach   +4 more
wiley   +1 more source

Impact of Mantle Velocity Uncertainty on Receiver‐Function Imaging of the Transition Zone

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Seismological estimates of the 400‐km and 670‐km mantle discontinuities (d400 and d670) are crucial for understanding the thermochemical structure and dynamics of the mantle transition zone (MTZ). However, artifacts from using ray theory and uncertainties in mantle velocity structure can affect topographic mapping of these boundaries.
Carlos A. M. Chaves, Felipe P. Corral, Jeroen Ritsema   +2 more
wiley   +1 more source

The Detection of Transient Subduction Zone Interface Properties Using Teleseismic Data

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The physical properties of subduction zone interfaces govern the transition between stable aseismic slip, episodic slow slip events (SSEs), and large earthquakes. Ultraslow velocity layers (USVLs) along the megathrust are commonly interpreted as indicators of elevated pore‐fluid pressures that promote slow slip, but their temporal variability ...
F. Rappisi, T. J. Craig, S. Rost
wiley   +1 more source

Stress Transfer From Slow Slip Events to Earthquake Swarms as a Cycle in the Southernmost Ryukyu Subduction Zone

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Recent megathrust earthquakes preceded by slow slip events highlight static stress transfer as a key triggering mechanism. However, there are limited insights into the interplay between static stress transfer and elevated fluid pressure before earthquake triggering.
Sean Kuanhsiang Chen, Wei Peng, Yung‐Tsai Lai, J. Bruce H. Shyu, Yih‐Min Wu   +4 more
wiley   +1 more source

Revealing the Mechanisms of Heat Extremes Using an AI Enabled Diagnostic Framework

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Heat extremes have become a major health hazard around the world. Understanding their mechanisms remains a major challenge because the physical drivers interact in a nonlinear way. Here we introduce a globally perturbed reforecast framework driven by the Neural general circulation model (NeuralGCM).
Longzhen Xiang, Ya Wang, Robin T. Clark, Kai Yang, Gang Huang, Xichen Li, Pengfei Lin, Kaiming Hu, Weichen Tao, Xia Qu   +9 more
wiley   +1 more source

Foreshock Migration Preceding the 2025 Mw 8.8 Kamchatka Earthquake: Insights From Single‐Station Observations

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract We investigate the spatiotemporal evolution of foreshocks preceding the 2025 Mw 8.8 Kamchatka earthquake by applying single‐station analysis to waveforms recorded at the nearest seismic station. Our results reveal a southwestward migration of foreshocks toward the mainshock epicenter through multiple stages, with a migration speed of ∼7.0 km ...
Ji Zhang, Aitaro Kato, Wei Wang, Miao Zhang   +3 more
wiley   +1 more source

Evaluation of Proposed Earthquake Precursors

Eos, Transactions American Geophysical Union, 1991
AGU's Evaluation of Proposed Earthquake Precursors presents the first results of a project carried out by the International Association of Seismology and Physics of the Earth's Interior (IASPEI) to evaluate claims about precursors to earthquakes. Only three of 28 nominations were accepted for the Preliminary List of Significant Precursors that IASPEI ...
openaire   +2 more sources