4.6 Article

Rupture kinematics of 2020 January 24 Mw 6.7 Doganyol-Sivrice, Turkey earthquake on the East Anatolian Fault Zone imaged by space geodesy

期刊

GEOPHYSICAL JOURNAL INTERNATIONAL
卷 223, 期 2, 页码 862-874

出版社

OXFORD UNIV PRESS
DOI: 10.1093/gji/ggaa345

关键词

Satellite geodesy; Earthquake dynamics; Earthquake source observations

资金

  1. HELPOSHellenic Plate Observing System [MIS 5002697]
  2. European Union (European Regional Development Fund)
  3. Alexander von Humboldt Foundation Research Fellowship Award

向作者/读者索取更多资源

Here, we present the results of a kinematic slip model of the 2020 M-w 6.7 Doganyol-Sivrice, Turkey Earthquake, the most important event in the last 50 yr on the East Anatolian Fault Zone. Our slip model is constrained by two Sentinel-1 interferograms and by 5 three-component high-rate GNSS (Global Navigation Satellite System) recordings close to the earthquake source. We find that most of the slip occurs predominantly in three regions, two of them at between 2 and 10 km depth and a deeper slip region extending down to 20 km depth. We also relocate the first two weeks of aftershocks and Ilnd a distribution of events that agrees with these slip features. The HR-GNSS recordings suggest a predominantly unilateral rupture with the effects of a directivity pulse clearly seen in the waveforms and in the measure peak ground velocities. The slip model supports rupture propagation from northeast to southwest at a relatively slow speed of 2.2 km s(-1) and a total source duration of similar to 20 s. In the absence of ncar-source seismic stations, space geodetic data provide the best constraint on the spatial distribution of slip and on its time evolution.

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