Special focus/Rapid Communication Moment magnitudes of two large Turkish earthquakes on February 6, 2023 from long-period coda

Xinyu Jiang, Xiaodong Song, Tian Li, Kaixin Wu

Research output: Contribution to journalArticlepeer-review

Abstract

Two large earthquakes (an earthquake doublet) occurred in south-central Turkey on February 6, 2023, causing massive damages and casualties. The magnitudes and the relative sizes of the two mainshocks are essential information for scientific research and public awareness. There are obvious discrepancies among the results that have been reported so far, which may be revised and updated later. Here we applied a novel and reliable long-period coda moment magnitude method to the two large earthquakes. The moment magnitudes (with one standard error) are 7.95±0.013 and 7.86±0.012, respectively, which are larger than all the previous reports. The first mainshock, which matches the largest recorded earthquakes in the Turkish history, is slightly larger than the second one by 0.11±0.035 in magnitude or by 0.04 to 0.18 at 95% confidence level.

Original languageEnglish (US)
Pages (from-to)169-174
Number of pages6
JournalEarthquake Science
Volume36
Issue number2
DOIs
StatePublished - Apr 2023
Externally publishedYes

Keywords

  • 2023 Turkish earthquakes
  • coda wave
  • long-period
  • moment magnitude

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics
  • Geology

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