Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake
The Gulf of Aqaba earthquake occurred on 22 November 1995 in the Northern Red Sea and is the largest instrumentally recorded earthquake in the region to date. The event was extensively studied during the initial years following its occurrence. However, it remained unclear which of the many faults i...
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| Format: | Article |
| Language: | English |
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McGill University
2024-02-01
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| Series: | Seismica |
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| Online Access: | https://seismica.library.mcgill.ca/article/view/1135 |
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| author | Hannes Vasyura-Bathke Andreas Steinberg Frank Krüger Guangcai Feng P. Martin Mai Sigurjón Jónsson |
| author_facet | Hannes Vasyura-Bathke Andreas Steinberg Frank Krüger Guangcai Feng P. Martin Mai Sigurjón Jónsson |
| author_sort | Hannes Vasyura-Bathke |
| collection | DOAJ |
| description |
The Gulf of Aqaba earthquake occurred on 22 November 1995 in the Northern Red Sea and is the largest instrumentally recorded earthquake in the region to date. The event was extensively studied during the initial years following its occurrence. However, it remained unclear which of the many faults in the gulf were activated during the earthquake. We present results from multi-array back projection that we use to inform Bayesian kinematic rupture models constrained by geodetic and teleseismic data. Our results indicate that most of the moment release was on the Aragonese fault via left-lateral strike slip and shallow normal faulting that may have been dynamically triggered by an early rupture phase on the Arnona fault. We also identified a predominantly normal fault-segment on the eastern shore of the gulf that was activated in the event. We dismiss the previously proposed hypothesis of a co-seismic sub-event on the western shore of the gulf and confirm that observed deformation can be rather attributed to post-seismic activity. In conclusion, the gulf shows many signs of active tectonic extension. Therefore, more events close to the shorelines are to be expected in the future and should be considered conducting infrastructure projects in the region.
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| first_indexed | 2024-03-07T23:08:35Z |
| format | Article |
| id | doaj.art-e3a3d36bc16b43ccbc08258773d52470 |
| institution | Directory Open Access Journal |
| issn | 2816-9387 |
| language | English |
| last_indexed | 2024-03-07T23:08:35Z |
| publishDate | 2024-02-01 |
| publisher | McGill University |
| record_format | Article |
| series | Seismica |
| spelling | doaj.art-e3a3d36bc16b43ccbc08258773d524702024-02-21T22:57:34ZengMcGill UniversitySeismica2816-93872024-02-013110.26443/seismica.v3i1.1135Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquakeHannes Vasyura-Bathke0Andreas Steinberg1Frank Krüger2Guangcai Feng3P. Martin Mai4Sigurjón Jónsson5King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia, University of7 Potsdam, D-14476 Potsdam, Germany, Now at: Helmholtz Centre Potsdam, German Research Centre for8 Geosciences GFZBGR, Federal Institute for Geosciences and Natural Resources, D-30655 Hannover, GermanyUniversity of7 Potsdam, D-14476 Potsdam, GermanyCentral South University, Changsha, ChinaKing Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi ArabiaKing Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia The Gulf of Aqaba earthquake occurred on 22 November 1995 in the Northern Red Sea and is the largest instrumentally recorded earthquake in the region to date. The event was extensively studied during the initial years following its occurrence. However, it remained unclear which of the many faults in the gulf were activated during the earthquake. We present results from multi-array back projection that we use to inform Bayesian kinematic rupture models constrained by geodetic and teleseismic data. Our results indicate that most of the moment release was on the Aragonese fault via left-lateral strike slip and shallow normal faulting that may have been dynamically triggered by an early rupture phase on the Arnona fault. We also identified a predominantly normal fault-segment on the eastern shore of the gulf that was activated in the event. We dismiss the previously proposed hypothesis of a co-seismic sub-event on the western shore of the gulf and confirm that observed deformation can be rather attributed to post-seismic activity. In conclusion, the gulf shows many signs of active tectonic extension. Therefore, more events close to the shorelines are to be expected in the future and should be considered conducting infrastructure projects in the region. https://seismica.library.mcgill.ca/article/view/1135bayesian inversionRed Seaearthquakebackprojection |
| spellingShingle | Hannes Vasyura-Bathke Andreas Steinberg Frank Krüger Guangcai Feng P. Martin Mai Sigurjón Jónsson Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake Seismica bayesian inversion Red Sea earthquake backprojection |
| title | Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake |
| title_full | Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake |
| title_fullStr | Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake |
| title_full_unstemmed | Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake |
| title_short | Discontinuous transtensional rupture during the Mw 7.2 1995 Gulf of Aqaba earthquake |
| title_sort | discontinuous transtensional rupture during the mw 7 2 1995 gulf of aqaba earthquake |
| topic | bayesian inversion Red Sea earthquake backprojection |
| url | https://seismica.library.mcgill.ca/article/view/1135 |
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