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


Melgar D., Ganas A., Taymaz T., Valkaniotis S., Crowell B. W., Kapetanidis V., ...More

GEOPHYSICAL JOURNAL INTERNATIONAL, vol.223, no.2, pp.862-874, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 223 Issue: 2
  • Publication Date: 2020
  • Doi Number: 10.1093/gji/ggaa345
  • Journal Name: GEOPHYSICAL JOURNAL INTERNATIONAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, Communication Abstracts, Compendex, Environment Index, Geobase, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.862-874
  • Istanbul Technical University Affiliated: Yes

Abstract

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.