This study investigates the missing data problem in the Japan Meteorological Agency catalog of the Kumamoto aftershock sequence, which occurred since April 15, 2016, in Japan. Based on the assumption that earthquake magnitudes are independent of their occurrence times, we replenish the short-term missing data of small earthquakes by using a bi-scale transformation and study their influence on t...

The recently developed matched filter technique is effective in detecting earthquakes during intensive aftershock or swarm sequences. However, currently our detection code can only process on single-CPU computers, which takes a long time to perform the cross-correlation between continuous seismic data and template events. In this paper, we present a GPU-based computation method to significantly...

The recurrence intervals of repeating earthquakes on the San Andreas Fault in the Loma Prieta aftershock zone follow the characteristic 1/t decay of Omori’s law. A model in which these earthquakes occur on isolated patches of the fault that fail in stick-slip with creep around them can explain this observation. In this model the recurrence interval is inversely proportional to the loading rate ...

Statistical verification of the VAN or SES (seismic electric signals) predictions from 1987-1989 is considered. The test is carried out with the updated ruies proposed by Varotsos et al. [1996]. Although for the Greek (SI-NOA) earthquake catalog the VAN method formally is successful, this high rate of success is due either to the retroactive adjustment of prediction rules or to the non-randomne...

A destructive earthquake (Mw 6.1) struck Pasaman, West Sumatra, Indonesia, on 25 February 2022, resulting in at least 18 deaths and damage to 1765 buildings. Our relocated foreshock, mainshock, aftershocks their source mechanisms reveal a previously unknown ∼20 km long segment of the Sumatran Fault as result dextral strike-slip motion (strike N132oE dip 72oSW) along what we have called Kajai Fa...

On October 30, 2020, a strong earthquake (Mw6.6-7.0) occurred offshore, just north of Samos Island, causing life losses, injuries and damages, especially on the Turkish side. The broader area is characterized by complex geodynamic setting with both rich seismic history numerous active faults different direction kinematics. first aim this study to define source mainshock, based seismological geo...

Abstract The clearest statistical signal in aftershock locations is that most aftershocks occur close to their mainshocks. More precisely, are triggered at distances following a power-law decay distance (Felzer and Brodsky, 2006). This kernel used epidemic-type sequence (ETAS) modeling typically assumed be isotropic, even though individual sequences show more clustered occurrence. assumption of...

During any unique crisis, panic sell-off leads to a massive stock market crash that may continue for more than day, termed as mainshock. The effect of mainshock in the form aftershocks can be felt throughout recovery phase price. As remains stress during recovery, small perturbation relatively smaller aftershock. duration has been estimated using structural break analysis. We have carried out s...

A significant episode of seismic and geodetic unrest took place at Long Valley Caldera, California, beginning in the summer of 1997. Activity through late May of 1998 was concentrated in and around the south moat and the south margin of the resurgent dome. The Sierran Nevada block (SNB) region to the south/southeast remained relatively quiet until a M 5.1 event occurred there on 9 June 1998 (UT...

Long-period teleseismic P and S waves from the WWSS and Canadian networks are modeled to determine the focal parameters for the main shock in the Oroville earthquake series. Using the techniques of P first motions, wave-form synthesis, and phase identification, the focal parameters are determined as follows: dip 65°; rake 70°; strike 180°; depth 5.5 + 1.5 km; moment 5.7 _+ 2.0 x 1024 dyne-cm; a...