Results 21 to 30 of about 99 (90)

Reduced seismic activity after mega earthquakes

Communications Earth & Environment
Mainshocks are often followed by increased earthquake activity (aftershocks). According to the Omori-Utsu law, the rate of aftershocks decays as a power law over time.
Yongwen Zhang, Maor Elbaz, Shlomo Havlin, Yosef Ashkenazy   +3 more
doaj   +1 more source

Automatic Earthquake Declustering Using the Nearest‐Neighbor Distance

Earth and Space Science, Volume 13, Issue 1, January 2026.
Abstract In the widely adopted description of seismic occurrence, earthquakes are categorized as either background or triggered events. In this work, we present a fully automated, non‐parametric algorithm for distinguishing between these two categories, a process known as seismic declustering, based on the widely used nearest‐neighbor (NN) metric.
P. Bountzis, E. Lippiello, S. Baccari, G. Petrillo   +3 more
wiley   +1 more source

Spatial Interactions Govern Tectonic Tremor Activities in the Nankai Trough: A Statistical Approach for Spatiotemporal Pattern Modeling and Anomaly Detection

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract Establishing a quantitative framework to evaluate the spatiotemporal patterns of slow earthquakes and to detect their anomalous activities is essential for understanding diverse slip behaviors on plate boundaries and seismic hazard assessment. In this study, we focus on deep tectonic tremors, which are one manifestation of slow earthquakes and
Seiya Yano, Satoshi Ide, Shunichi Nomura
wiley   +1 more source

Unsupervised Likelihood Inference of the b‐Value via Magnitude Differences

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.
Abstract Estimating the Gutenberg–Richter b‐value from seismic catalogs is critical for earthquake forecasting and hazard assessment. However, traditional approaches rely on predefined magnitude thresholds and are highly sensitive to catalog incompleteness, limiting their applicability in automated or real‐time settings.
C. Godano, E. Lippiello, G. Petrillo
wiley   +1 more source

Fluid Processes Highlighted by Temporal Variations of b‐Value During Swarms and Aftershocks Sequences in the Ubaye Region (Western Alps, France)

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract The b‐value from the Gutenberg‐Richter law is a crucial parameter in the assessment of seismic hazard. Its temporal variations may also bring useful insights on the processes driving seismicity at depth, even if not yet fully understood. In this paper, we focus on the temporal evolution of the b‐value in the Ubaye Region (French Western Alps ...
Marion Baques, Clara Duverger, Louis De Barros, Hervé Jomard, Maxime Godano   +4 more
wiley   +1 more source

Mechanics and Statistics of Postseismic Shaking

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract Analysis of 2 weeks of continuous post‐seismic shaking after the 2019 M7.1 Ridgecrest, CA earthquake sequence using 4 nearby borehole seismometers reveals that continuous ground motions decay as Omori's law in time and follow the Gutenberg‐Richter distribution in logarithmic amplitude.
T. Clements, E. S. Cochran, S. E. Minson, N. J. van der Elst, C. E. Yoon, A. Baltay, M. T. Page   +6 more
wiley   +1 more source

Back to the Source: Connecting the Seismological Observations of Le Teil Earthquake (Mw 4.9, 2019/11/11, France) to the Local Geology

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 9, September 2025.
Abstract The spatial distribution of seismicity in active fault zones depends primarily on the geometry of the fault networks. However, recent advances suggest that seismic activity may also be controlled by the rheology of the geological units surrounding fault zones. In the present work, we use seismological and geological analyses to investigate the
Maxime Godano, Christophe Larroque, Bertrand Delouis, Jean‐Paul Ampuero, Feyza Arzu, Françoise Courboulex, Anne Deschamps, Martijn van den Ende, Stéphane Baize, Jean‐François Ritz   +9 more
wiley   +1 more source

Aftershock analysis and forecasting for the crustal seismicity in Romania

Earth, Planets and Space
Romania is known for its persistent seismicity at intermediate-depths in the Vrancea region. However, crustal areas are also a significant source of seismic hazard, although large shallow events are less common.
Cristian Ghita, Bogdan Enescu, Alexandru Marinus, Iren-Adelina Moldovan, Constantin Ionescu, Eduard Gabriel Constantinescu, Like An   +6 more
doaj   +1 more source

Statistical Characteristics of Seismicity Correlated With Crustal Fluids in the Noto Region

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 9, September 2025.
Abstract Earthquake swarms and strong shocks have frequently occurred in Noto Peninsula, Japan, for decades, resulting in a seismicity pattern characterized by a mixture of background earthquakes, swarms, and foreshock/aftershock sequences. Using an improved version of the space‐time Epidemic‐Type Aftershock Sequence model, we extract statistical ...
Yicun Guo, Jiancang Zhuang, Guangyao Yin, Huai Zhang   +3 more
wiley   +1 more source

The Role of Co‐Seismic Devolatilization in Driving Aftershock Sequences in Greece

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract We investigate the role of co‐seismic devolatilization in driving aftershock sequences, focusing on three recent sequences in Greece: Thiva, Damasi, and Florina. We use a numerical model incorporating non‐linear diffusion with a source term that accounts for fluid generation via thermal decomposition of carbonates.
Gaëlle Toussaint, Benoît Valley, Thanushika Gunatilake, Stephen A. Miller   +3 more
wiley   +1 more source