Results 61 to 70 of about 1,532 (175)

Regional Characteristics of Observable Foreshocks

, 2022
Measures of foreshock occurrence are systematically examined using earthquake catalogs for eight regions (Italy, southern California, northern California, Costa Rica, Onshore Japan, Alaska, Turkey, and Greece) after imposing a magnitude ≥ 3.0 ...
Lay, Thorne, Brodsky, Emily, Chaves, Esteban, Wetzler, Nadav, Goebel, Thomas, Brodsky, Emily E., Goebel, Thomas H.W., Chaves, Esteban J.   +7 more
core   +1 more source

Statistical Features of Foreshocks in Instrumental and ETAS Catalogs [PDF]

, 2017
We study the spatial distribution of earthquakes in temporal intervals before and after the occurrence of large shocks (mainshocks) in the magnitude range m∈ [ 2 , 5 ] for four different regional catalogs.
Marzocchi, W., Godano, G., Lippiello, E., G. Godano, L. de Arcangelis, W. Marzocchi, Giacco, F., Arcangelis, L., F. Giacco, E. Lippiello, LIPPIELLO, Eugenio, Marzocchi, Warner, DE ARCANGELIS, Lucilla, Giacco, Ferdinando, GODANO, Cataldo   +14 more
core   +1 more source

Short‐term foreshocks as key information for mainshock timing and rupture: The Mw6.8 25 october 2018 Zakynthos Earthquake, Hellenic subduction zone

, 2020
Significant seismicity anomalies preceded the 25 October 2018 mainshock (Mw = 6.8), NW Hellenic Arc: a transient intermediate‐term (~2 yrs) swarm and a short‐term (last 6 months) cluster with typical time‐size‐space foreshock patterns: activity increase,
Triantafyllou, I., Agalos, A., Krassakis, P., Minadakis, G., Papadopoulos, G.A.   +4 more
core   +1 more source

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

Geophysical Research Letters
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.
Carlos Peña, Leoncio Cabrera, Jesús Muñoz‐Montecinos, Sergio Ruiz, Oliver Heidbach   +4 more
doaj   +1 more source

Variations in precursory slip behavior resulting from frictional heterogeneity

Progress in Earth and Planetary Science, 2018
Precursory seismicity is often observed before a large earthquake. Small foreshocks occur within the mainshock rupture area, which cannot be explained by simple models that assume homogeneous friction on the entire fault.
Suguru Yabe, Satoshi Ide
doaj   +1 more source

Foreshocks and Nucleation Process of the 2018 Ms 4.8 and 5.2 Chengduo Doublet, China

Foreshocks may offer critical insights into the nucleation process of an upcoming mainshock, yet their underlying physical mechanisms remain a topic of ongoing debate.
Ting Ma, Li Deng, Yipei Tan, Wenzheng Gong   +3 more
core   +1 more source

Spatial organization of foreshocks as a tool to forecast large earthquakes

, 2012
An increase in the number of smaller magnitude events, retrospectively named foreshocks, is often observed before large earthquakes. We show that the linear density probability of earthquakes occurring before and after small or intermediate mainshocks ...
Marzocchi, W., DE ARCANGELIS, Lucilla, Lippiello, E., LIPPIELLO, Eugenio, Marzocchi W, Godano, C., Cataldo, G., De Arcangelis, L., GODANO, Cataldo   +8 more
core   +1 more source

Foreshock activity and its probabilistic relation to earthquake occurrence in Albania and the surrounding area

Annals of Geophysics, 1999
We investigate some characteristics of foreshock activity of moderate and large earthquakes which occurred in the present century in Albania and the surrounding area. Using a prediction algorithm, based on possible foreshocks, we obtained a probabilistic
K. Irikura, K. Matsumura, V. Peçi, K. Maeda   +3 more
doaj   +1 more source

Machine Learning Predicts Earthquakes in the Continuum Model of a Rate‐And‐State Fault With Frictional Heterogeneities

Geophysical Research Letters
Machine learning (ML) has been used to study the predictability of laboratory earthquakes. However, the question remains whether or not this approach can be applied in a tectonic setting where one may have to rely on sparse earthquake catalogs, and where
Reiju Norisugi, Yoshihiro Kaneko, Bertrand Rouet‐Leduc   +2 more
doaj   +1 more source

Mesoscopic mechanism behind the inherent reliquefaction resistance subjected to repeated earthquakes using centrifuge modelling and advanced digital image processing

Soils and Foundations
Around the world severe damages were observed due to reliquefaction during repeated earthquakes, whereas precise understanding of its mesoscopic mechanism is not much discovered.
Gowtham Padmanabhan, Bal Krishna Maheshwari, Kyohei Ueda, Ryosuke Uzuoka   +3 more
doaj   +1 more source