Earthquake infrasound contains information concerning the underground media and earthquake source. We identify three types of repeating infrasound: local, secondary, epicentral from two successive Mw6.2 earthquakes (separated by <2 h <10 km) in Alaska. The path effects are same for sets infrasound, letting us focus on coupling mechanism. calculate relative power spectral density change between ...

On 11 August 2012, twin earthquakes measured 6.3 and 6.4 on the Richter scale hit three towns (Ahar, Varzaqan, and Heris) in East Azerbaijan Province, Iran resulting in tragic loss of three hundred lives and leaving thousands of injured. The aim of the present study was to report the spinal injuries during recent earthquake in northwest Iran, its consequences and management. Of the 923 hospital...

On 6 February 2023 (UTC), an earthquake doublet, consisting of the Mw 7.8 Pazarcik and 7.5 Elbistan earthquake, struck south-central Turkey northwestern Syria, which was largest that occurred in since 1939 Erzincan earthquake. The faulting model this estimated based on coseismic InSAR GPS displacements. In addition, best-fitting indicates both were controlled by predominated left-lateral strike...

Earthquakes in deeply subducted oceanic lithosphere can involve either brittle or dissipative ruptures. On 24 November 2015, two deep (606 and 622 km) magnitude 7.5 and 7.6 earthquakes occurred 316 s and 55 km apart. The first event (E1) was a brittle rupture with a sequence of comparable-size subevents extending unilaterally ~50 km southward with a rupture speed of ~4.5 km/s. This earthquake t...

in 2012 august 11 (12:23 utc) a moderate earthquake with mw=6.4 (usgs) occurred between ahar and varzaghan towns in azarbayjan province at northwest of iran. after eleven minutes another earthquake shook the area with mw=6.2 (usgs). these consecutive earthquakes followed by intensive sequences of aftershocks whereas the strongest one had mw=5.3 (usgs). in data processing including depth modific...

Earthquake faulting at ~600 km depth remains puzzling. Here we present a new kinematic interpretation of two Mw7.6 earthquakes of November 24, 2015. In contrast to teleseismic analysis of this doublet, we use regional seismic data providing robust two-point source models, further validated by regional back-projection and rupture-stop analysis. The doublet represents segmented rupture of a ∼30-y...

The Alpine-Himalayan orogenic belt, the well-identified seismically active region in world, has been evidenced by occurrence of recent two devastating earthquake doublets 2015 central Nepal (MW 7.8 and MW 7.3) 2023 southeastern Turkey(MW 7.5). In this study, seismic ground motion characteristics damaging earthquakes namely doublet that occurred Himalaya Turkey eastern Mediterranean investigated...