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  Diverse Rupture Characteristics between the 2023 Mw 7.8 and Mw 7.5 Turkey Earthquakes

Ye, L., Xia, T., Taymaz, T., Irmak, T. S., Özkan, B., Kanamori, H., Rivera, L., Sang, Y., Lay, T. (2023): Diverse Rupture Characteristics between the 2023 Mw 7.8 and Mw 7.5 Turkey Earthquakes, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-5013

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021412 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021412_1
Genre: Conference Paper

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 Creators:
Ye, Lingling1, Author
Xia, Tao1, Author
Taymaz, Tuncay1, Author
Irmak, Tahir Serkan1, Author
Özkan, Berkan1, Author
Kanamori, Hiroo1, Author
Rivera, Luis1, Author
Sang, Yingquan1, Author
Lay, Thorne1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: On 6 February 2023, an MW 7.8 earthquake occurred on the southwestern part of the East Anatolian Fault zone (EAF), followed by an MW 7.5 at ~100 km away on the East-West striking Sürgü fault 9 hours later. The W-Phase inversions indicate major strike-slip with dip angles of 60° for both events. A notable difference in seismic waveforms between two major earthquakes suggests different rupture characteristics. High-frequency back projection images for the MW 7.8 event from the dense broadband ChinArray shows a NE unilateral rupture from the onset for 40 sec with the expansion to the EAF trace since ~20 s and stopping at the junction of EAF and Sürgü fault, along with some late radiation at ~40-60 s to SW at the Amanos segment of EAF. The back projection image for the MW 7.5 event shows a main high-frequency coherent energy release for the first 10 sec over ~40 km and late weak radiations to the west near the curved Cardak fault and to the east near the Malatya fault. Preliminary slip models inverted from teleseismic data indicate a complex rupture for the MW 7.8 event predominantly on the EAF and a localized slip for the MW 7.5 event. The difference also exhibits in body-wave magnitude with mB=7.5 for the MW 7.5 and mB=7.2 for the MW 7.8 events. We are exploring InSAR images, hr-GNSS, and strong-motion data to constrain details in the rupture process of both events.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
 Publishing info: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-5013
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -