Abstract For decades there has been a debate about the relative effects of dynamic versus static stress triggering aftershocks. According to Coulomb change hypothesis, aftershocks should not occur in shadows—regions where reduced. We show that shadows substantially influence aftershock occurrence following three M ? 7 California mainshocks. Within modeled shadows, rate is an order magnitude low...

An earthquake sequence occurred in the Atacama region of Chile throughout September 2020. The initiated by a mainshock magnitude Mw= 6.9, followed 17 hours later 6.4 aftershock. lasted several weeks, during which more than thousand events larger Ml= 1 occurred, including earthquakes magnitudes between 5.5 and 6.4. Using dense network that includes broad-band, strong motion GPS sites, we study d...

Four large earthquakes occurred in 1980 in a seismic gap near the Loyalty Islands in the New Hebrides. At 3:25 UT on October 24 an event with M, = 6.7 initiated the sequence. Three events, M, = 6.7, 7.2, and 6.5, followed on the next day. We investigated this sequence by using the seismicity, first-motion, and wavefonn data and long-period surface waves. The first-motion data constrain one of e...

Conventional probabilistic seismic hazard analysis (PSHA) only considers mainshock events and uses a time-independent earthquake rupture forecast to describe the occurrence of mainshocks. This approach neglects long-term time-dependency mainshocks on specific fault segments, interaction adjacent faults, spatial temporal clustering aftershocks. study integrates recently proposed advanced fault-b...

The Western Gulf of Corinth (WGoC) exhibits significant seismicity patterns, combining intense microseismic background activity with both seismic swarms and short-lived aftershock sequences. Herein, we present a catalogue ~9000 events, derived by manual analysis double-difference relocation, for the WGoC during 2013–2014. high spatial resolution hypocentral distribution permitted delineation ac...

We study the major MW = 7.0, 30 October 2020, Samos earthquake and its aftershocks, by calculating improved locations using differential travel times waveform cross-correlations. image rupture of mainshock local strong motion data, we examine Coulomb stress evolution prior to mainshock, as well coseismic changes. Lastly, estimate produced shaking all available information from data testimonies....

Abstract We present here an analysis of the destructive Mw 6.2 earthquake sequence that took place on 14 January 2021 in Mamuju–Majene, West Sulawesi, Indonesia. Our relocated foreshocks, mainshock, and aftershocks their focal mechanisms show they occurred two different fault planes, which foreshock perturbed stress state a nearby segment, causing plane to subsequently rupture. The mainshock ha...

We have developed a method to detect long-period precursors for large earthquakes observed in southern California, if they occur. The method allows us to continuously monitor seismic energy radiation over a wide frequency band to investigate slow deformation in the crust (e.g., slow earthquakes), especially before large earthquakes. We used the long-period records (1 sample/sec) from TERRAscope...

In the period between December 2018 and July 2019, a series of earthquakes (EQs), including 16 Ms 5.7 Xingwen mainshock 17 June 2019 6.0 Changning mainshock, struck shale gas exploration field in southern margin Sichuan Basin. The EQs both occurred on concealed faults, which led to hundreds casualties, affected total over 160 thousand people Sichuan. aftershock sequences following were clustere...