The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran
Within two hours on 01 July 2023, three earthquakes of Mw 5.8-6.0 hit the SE Fars arc, Iran. In the following months, the region characterized by the collision of the Iranian and the Arabian plate, thrust faulting, and salt diapirism was stroke by more than 120 aftershocks of mL 3.1-5.2, of which tw...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
McGill University
2023-11-01
|
| Series: | Seismica |
| Online Access: | https://seismica.library.mcgill.ca/article/view/953 |
| _version_ | 1827759191680352256 |
|---|---|
| author | Malte Metz Behnam Maleki Asayesh Mohammad Mohseni Aref Mohammadreza Jamalreyhani Pınar Büyükakpınar Torsten Dahm |
| author_facet | Malte Metz Behnam Maleki Asayesh Mohammad Mohseni Aref Mohammadreza Jamalreyhani Pınar Büyükakpınar Torsten Dahm |
| author_sort | Malte Metz |
| collection | DOAJ |
| description | Within two hours on 01 July 2023, three earthquakes of Mw 5.8-6.0 hit the SE Fars arc, Iran. In the following months, the region characterized by the collision of the Iranian and the Arabian plate, thrust faulting, and salt diapirism was stroke by more than 120 aftershocks of mL 3.1-5.2, of which two of the largest events occurred within one minute on 23 July 2023 in spatial vicinity to each other. We analyzed both the large mainshocks and aftershocks using different techniques, such as the inversion of seismic and satellite deformation data in a joint process and aftershock relocation. Our results indicate the activation of thrust faults within the lower sedimentary cover of the region along with high aftershock activity in significantly larger depth, supporting the controversial model of a crustal strain decoupling during the collision in the Fars Arc. We resolved a magnitude difference of >0.2 magnitude units between seismic and joint seismic and satellite deformation inversions probably caused by afterslip, thereby allowing to bridge between results from international agencies and earlier studies. We also find evidence for an event doublet and triplet activating the same or adjacent faults within the sedimentary cover and the basement
|
| first_indexed | 2024-03-11T09:17:36Z |
| format | Article |
| id | doaj.art-1bb33d066405401894120c92fc6bfcff |
| institution | Directory Open Access Journal |
| issn | 2816-9387 |
| language | English |
| last_indexed | 2024-03-11T09:17:36Z |
| publishDate | 2023-11-01 |
| publisher | McGill University |
| record_format | Article |
| series | Seismica |
| spelling | doaj.art-1bb33d066405401894120c92fc6bfcff2023-11-16T18:31:53ZengMcGill UniversitySeismica2816-93872023-11-012210.26443/seismica.v2i2.953The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, IranMalte Metz0Behnam Maleki Asayesh1Mohammad Mohseni Aref2Mohammadreza Jamalreyhani3Pınar Büyükakpınar4Torsten Dahm5GFZ, German Research Center for Geosciences, PotsdamGFZ, German Research Centre for Geosciences, PotsdamUniversity of Potsdam, GermanyInstitute of Geophysics, University of Tehran, Tehran, IranGFZ, German Research Centre for Geosciences, Potsdam, GermanyGFZ German Research Centre for Geosciences, Potsdam, GermanyWithin two hours on 01 July 2023, three earthquakes of Mw 5.8-6.0 hit the SE Fars arc, Iran. In the following months, the region characterized by the collision of the Iranian and the Arabian plate, thrust faulting, and salt diapirism was stroke by more than 120 aftershocks of mL 3.1-5.2, of which two of the largest events occurred within one minute on 23 July 2023 in spatial vicinity to each other. We analyzed both the large mainshocks and aftershocks using different techniques, such as the inversion of seismic and satellite deformation data in a joint process and aftershock relocation. Our results indicate the activation of thrust faults within the lower sedimentary cover of the region along with high aftershock activity in significantly larger depth, supporting the controversial model of a crustal strain decoupling during the collision in the Fars Arc. We resolved a magnitude difference of >0.2 magnitude units between seismic and joint seismic and satellite deformation inversions probably caused by afterslip, thereby allowing to bridge between results from international agencies and earlier studies. We also find evidence for an event doublet and triplet activating the same or adjacent faults within the sedimentary cover and the basement https://seismica.library.mcgill.ca/article/view/953 |
| spellingShingle | Malte Metz Behnam Maleki Asayesh Mohammad Mohseni Aref Mohammadreza Jamalreyhani Pınar Büyükakpınar Torsten Dahm The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran Seismica |
| title | The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran |
| title_full | The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran |
| title_fullStr | The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran |
| title_full_unstemmed | The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran |
| title_short | The July-December 2022 earthquake sequence in the southeastern Fars arc of Zagros mountains, Iran |
| title_sort | july december 2022 earthquake sequence in the southeastern fars arc of zagros mountains iran |
| url | https://seismica.library.mcgill.ca/article/view/953 |
| work_keys_str_mv | AT maltemetz thejulydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT behnammalekiasayesh thejulydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT mohammadmohseniaref thejulydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT mohammadrezajamalreyhani thejulydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT pınarbuyukakpınar thejulydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT torstendahm thejulydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT maltemetz julydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT behnammalekiasayesh julydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT mohammadmohseniaref julydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT mohammadrezajamalreyhani julydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT pınarbuyukakpınar julydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran AT torstendahm julydecember2022earthquakesequenceinthesoutheasternfarsarcofzagrosmountainsiran |