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Published January 1, 2024 | Version v1
Journal article Open

Unexpected far-field deformation of the 2023 Kahramanmaraş earthquakes revealed by space geodesy

Creators

  • 1. Bogazici Univ, Kandilli Observ & Earthquake Res Inst, Geodesy Dept, Istanbul, Turkiye
  • 2. Univ Montpellier, UMR 5243, Montpellier, France
  • 3. Istanbul Univ Cerrahpasa, Geophys Engn Dept, Istanbul, Turkiye
  • 4. Bogazici Univ, Kandilli Observ & Earthquake Res Inst, Istanbul, Turkiye
  • 5. Yildiz Tech Univ, Dept Geomat Engn, TR-34210 Istanbul, Turkiye
  • 6. MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA
  • 7. Istanbul Tech Univ, Dept Environm Engn, TR-34469 Istanbul, Turkiye
  • 8. Gebze Tech Univ, Inst Earth & Marine Sci, Kocaeli, Turkiye
  • 9. Sci & Technol Res Council Turkiye TUBITAK, Marmara Res Ctr, Earth Sci Res Grp, Vice Presidency Climate Change & Sustainabil, Kocaeli, Turkiye
  • 10. Gen Directorate Mapping, Geodesy Dept, Ankara, Turkiye

Description

The spatiotemporal pattern of surface displacements from large earthquakes provides crucial insights about the deformation of Earth's crust at various scales and the interactions among tectonic plates. However, the lack of extensive and large-scale geodetic networks near such seismic events hinders our thorough understanding of the large-scale crustal deformation resulting from earthquakes. Using T & uuml;rkiye's extensive and continuous global navigation satellite system (GNSS) network during the moment magnitude 7.8 and 7.6 Kahramanmara & scedil; earthquakes on 6 February 2023, we show that large earthquakes can induce far-field crustal deformations (>700 kilometers), exceeding current predictions from elastic dislocation models. They can lead to the mobilization of tectonic plates and the triggering of far-field earthquakes, which carries profound implications for seismic hazard assessments and necessitates a new perspective on crustal deformation and earthquake mechanics.

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