The Haicheng, China earthquake of February 4, 1975, was the first major seismic event to be predicted. In this paper, long-period teleseismic P waves and S waves from this event are compared directly to time-domain synthetic seismograms to infer the source parameters. Results indicate the focal mechanism of the earthquake is nearly left-lateral strike slip along a northwest striking nodal plane...

We analyze seismograms recorded by four arrays (B1–B4) with 100 m station spacing and apertures of 4–8 km that cross the surface rupture 2019 Mw 7.1 Ridgecrest earthquake. The extend from B1 in northwest to B4 southeast rupture. Delay times between P wave arrivals associated ∼1,200 local earthquakes teleseismic events are used estimate velocity variations beneath arrays. Both waves travel faste...

Abstract The Mentawai Islands are located in the western part of Sumatra, Indo-Australian and Eurasian plate subduction zone. Because these tectonic settings, Region has a high level seismicity, making it particularly appealing for subsurface structure study. We used receiver function method this study to see response on zone compare two deconvolution. This uses conversion P-to-S waves, which h...

Abstract In this study, we investigate 70 days of distributed acoustic sensing (DAS) recordings in the Canary Islands using an undersea fiber-optic telecommunication cable that links islands Tenerife and Gran Canaria. Two DAS interrogators connected to both ends turned fiber into array 11,968 strain sensors covering a total length ∼120 km. We present details experiment, noise analysis, examples...

We present, for the first time, evidence for triggered tremor beneath the island of Sumbawa, Indonesia. We show triggered tremor in response to three teleseismic earthquakes: theMw 9.

Abstract. We present an extensive dataset of highly accurate absolute travel times and travel-time residuals teleseismic P waves recorded by the AlpArray Seismic Network complementary field experiments in years from 2015 to 2019. The is intended serve as basis for tomography upper mantle below greater Alpine region. In addition, data may be used constraints full-waveform inversion recordings. c...