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Rapid source inversions of the 2023 SE Türkiye earthquakes with teleseismic and strong-motion data

地震学报:英文版 2023年第4期36卷 316-327页

作者： Chenyu Xu Yong Zhang Sibo Hua Xu Zhang Lisheng Xu Yuntai Chen Tuncay Taymaz School of Earth and Space Sciences Peking UniversityBeijing 100871China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Istanbul Technical University The Faculty of MinesDepartment of Geophysical Engineering34467 SariyerIstanbulTürkiye

We conducted rapid inversions of rupture process for the 2023 earthquake doublet occurred in SE Türkiye,the first with a magnitude of M_(W)7.8 and the second with a magnitude of M_(W)7.6,using teleseismic and strong-motion data.The teleseismic rupture models of the both events were obtained approximately 88 and 55 minutes after their occurrences,respectively.The rupture models indicated that the first event was an asymmetric bilateral event with ruptures mainly propagating to the northeast,while the second one was a unilateral event with ruptures propagating to the west.This information could be useful in locating the meizoseismal areas.Compared with teleseismic models,the strong-motion models showed relatively higher resolution.A noticeable difference was found for the M_(W)7.6 earthquake,for which the strong-motion models shows a bilateral event,rather than a unilateral event,but the dominant rupture direction is still westward.Nevertheless,all strong-motion models are consistent with the teleseismic models in terms of magnitudes,durations,and dominant rupture directions.This suggests that both teleseismic and strong-motion data can be used for fast determination of major source characteristics.In contrast,the strong-motion data would be preferable in future emergency responses since they are recorded earlier and have a better resolution ability on the source ruptures.

关键词： the 2023 earthquake doublet in SE Türkiye fast source inversion teleseismic inversion strong-motion inversion

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