The mainshock (MS) is often accompanied by a number of aftershocks (AS). existence AS may cause the seismic demand to be greater than MS. In order better evaluate impact AS, this paper takes RC columns as research object and performs incremental dynamic analysis (IDA) on actual recorded mainshock-aftershocks (MS-AS). Park–Ang model damage index are used quantify effect MS respectively. fragilit...

The 5.1 ML Santa Barbara earthquake of 13 August 1978 occurred at 22h54 rn 52.8 s UTC. The epicenter was located 3 km southeast of Santa Barbara at 34 ° 23.9 'N latitude and 119°40.9'W longitude with a focal depth of 12.7 km. The main shock was fol lowed between 13 August and 30 September by 373 aftershocks that were located with the Caltech-USGS array. The aftershock zone extended 12 km WNW fr...

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...

The Ms 8.0 Wenchuan earthquake occurred on 12 May 2008, in the Sichuan Province of China, and it was accompanied by a series strong aftershocks. mechanisms contributing to triggering aftershocks have attracted international attention. In this paper, based previous analysis spatiotemporal distribution regarding pore pressure diffusion deep fluid, we established three-dimensional hydraulic–mechan...

The June 28, 1992, Mw 7.3 Landers earthquake occurred in the southeastern Mojave Desert, California. Over 10,000 aftershocks of the earthquake were recorded by the Caltech-USGS Southern California Seismic Network (SCSN) in 1992. To investigate the relationship between complexities in the crustal structure and variations in seismicity, we have used a tomographic method to invert 145,098 P wave a...

We study the behavior of U.S. markets both before and after U.S. Federal Open Market Commission meetings and show that the announcement of a U.S. Federal Reserve rate change causes a financial shock, where the dynamics after the announcement is described by an analog of the Omori earthquake law. We quantify the rate n(t) of aftershocks following an interest-rate change at time T and find power-...

The 2011 Tohoku earthquake (Mw 9.0) was followed by a large number of aftershocks that resulted in 70 early warning messages in the first month after the mainshock. Of these warnings, a non-negligible fraction (63%) were false warnings in which the largest expected seismic intensities were overestimated by at least two intensities or larger. These errors can be largely attributed to multiple co...