The 1994 Northridge mainshock and its aftershocks show a complex pattern of peak accelerations at stations located in the Los Angeles Basin. The waveforms contain multiples of body-wave phases and extensive surface waves at frequencies mostly below 1 Hz. In particular, for stations at distances greater than 18 km, secondary arrivals show larger accelerations than the directS-wave arrivals. The ...

During the passage of the seismic waves from the M7.3 Kumamoto, Kyushu, earthquake on April 16, 2016, a M5.7 [semiofficial value estimated by the Japan Meteorological Agency (JMA)] event occurred in the central part of Oita prefecture, approximately 80 km far away from the mainshock. Although there have been a number of reports that M < 5 earthquakes were remotely triggered during the passage o...

The aftershock distribution of the 2014 Mw 8.1 Iquique earthquake offshore northern Chile, identified from a long-term deployment ocean bottom seismometers installed eight months after mainshock, in conjunction with seismic reflection imaging, provides insights into processes regulating updip limit coseismic rupture propagation. Aftershocks mainshock hypocenter frequently occur upper plate and ...

After a strong mainshock, subsequent ground motion is the result of sequence multiple aftershocks, and damage to structure under these conditions more severe than from single earthquake. Most seismic studies are based on earthquake event. To explore influence main-aftershock an isolated inter-story structure, we constructed three-dimensional finite-element model such subjected it repeated seque...

Aseismic afterslip has been proposed to drive aftershock sequences. Both moment and number broadly increase with mainshock size, but can vary beyond this scaling. We examine whether relative (afterslip moment/mainshock moment) correlates several key sequence characteristics, including cumulative (both absolute size), seismicity rate change, b-value, Omori decay exponent. select Mw ? 4.5 aftersh...

Abstract Coseismic rotations of principal stress axes can provide insights into the strength crust, but it is unclear how common this phenomenon is. We use a nearest‐neighbor clustering algorithm to identify earthquake sequences in global ISC‐GEM catalog and regional Southern California catalog. Using an inner‐product‐based pairwise measure moment tensor similarity, we demonstrate that, both ca...

Strong crustal earthquakes in Greece are typically followed by aftershocks, the properties of which important factors seismic hazard assessment. In order to examine earthquake sequences, we prepared an catalog comprising aftershock sequences with mainshocks Mw ≥ 5.5 from 1995 2021. Regional parameters were estimated highlight variations decay and productivity among regions similar seismotectoni...