The RTL Anomaly of Seismicity before the February 6, 2023 Earthquake in Turkey

IF 0.9 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Izvestiya, Physics of the Solid Earth Pub Date : 2023-11-28 DOI:10.1134/S1069351323060204

V. B. Smirnov, A. A. Petrushov, V. O. Mikhailov

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Abstract—Based on the data from the regional Turkey earthquake catalog and the ANSS Comprehensive Earthquake Catalog for Turkey and a part of Iran, a posteriori analysis of RTL anomalies of seismicity before the damaging M_w 7.8 Pazarcik earthquake in Turkey of February 6, 2023 and, for comparison, before the M_w 7.1 earthquake of October 23, 2011 (Eastern Turkey), the M_w 7.3 earthquake of November 12, 2017 (Iran), and the М 6.7 earthquake of January 24, 2020 (the East Anatolian Fault), was made. Distinctly observable before the Pazarcik earthquake is an RTL anomaly with well-marked stages of a seismic quiescence and subsequent activation near the epicenter of the future earthquake. Spatially, the anomaly is one-and-a-half times smaller than the source of the Pazarcik earthquake, and one-and-a-half—two times smaller than RTL anomalies before other regional earthquakes with a magnitude above 7. By size, it corresponds to the anomaly before the M_w 6.7 earthquake that occurred on the same fault. As a hypothesis to explain why the size of the anomaly before the M_w 7.8 Pazarcik earthquake does not match the sizes of the anomalies characteristic of M7+ earthquakes, it was assumed that the detected RTL anomaly reflects the formation only of the first, relatively small segment of the source of the Pazarcik earthquake.

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2023年2月6日土耳其地震前地震活动的RTL异常

摘要数据区域土耳其地震目录和ans综合地震目录对土耳其和伊朗的一部分,RTL的后验分析前的地震活动异常的破坏性7.8 Mw Pazarcik地震在土耳其2月6日,2023年,相比之下,Mw 7.1级地震前的10月23日,2011(土耳其东部),11月12日的7.3 Mw地震,2017(伊朗),和1月24日,М6.7级地震2020(东安纳托利亚断层)。在pararcik地震之前，可以明显观察到一个RTL异常，在未来地震的震中附近有一个地震静止和随后激活的明显阶段。在空间上，该异常比帕扎尔西克地震的震源小1.5倍，比其他7级以上区域地震前的RTL异常小1.5倍。根据大小，它对应于发生在同一断层上的6.7级地震之前的异常。作为解释Pazarcik m7.8地震前异常大小与M7+地震异常特征大小不匹配的假设，假设检测到的RTL异常仅反映了Pazarcik震源的第一个相对较小的部分的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Izvestiya, Physics of the Solid Earth 地学-地球化学与地球物理

CiteScore

1.60

自引率

30.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Izvestiya, Physics of the Solid Earth is an international peer reviewed journal that publishes results of original theoretical and experimental research in relevant areas of the physics of the Earth''s interior and applied geophysics. The journal welcomes manuscripts from all countries in the English or Russian language.