2023年2月土耳其Kahramanmaras地震前的电离层变化

IF 2.8 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2025-02-01 DOI:10.1016/j.asr.2024.11.011

Ihsan Naufal Muafiry , Irwan Meilano , Dudy D. Wijaya , Erman Sentürk , Kosuke Heki

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引用次数: 0

摘要

土耳其南部的东安纳托利亚断层于2023年2月6日破裂，引发7.8级地震。大约9小时后，在第一次地震的北面又发生了7.5级的大地震。在这里，我们通过使用全球导航卫星系统接收器获得的总电子含量数据，寻找这些地震之前的电离层前兆，例如2011年日本东北地震前40分钟发现的电离层前兆。考虑到这些变化很小，我们首先利用它们与过去20次大地震的Mw的经验关系来推断异常的领先时间和强度。对于第一次地震，我们发现TEC趋势在破裂前约23分钟开始出现正变化，异常达到背景的约2%。这些价值与过去的事件一致。另一方面，中等尺度的移动电离层扰动活动阻碍了对第二次地震前变化的令人信服的探测。

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Ionospheric changes immediately before the 2023 February Kahramanmaras earthquakes, Turkey

The East Anatolian Fault in southern Turkey ruptured on 6 February 2023, causing a M_w 7.8 earthquake. Another large earthquake of M_w 7.5 occurred to the north of the first event ∼9 h later. Here we look for ionospheric precursors immediately before these earthquakes, like those found ∼40 min before the 2011 Tohoku-oki earthquake, Japan, by using the total electron content data obtained by global navigation satellite system receivers. Considering that the changes are small, we first inferred the leading times and the intensities of the anomalies using their empirical relationship with M_w from ∼20 past large earthquakes. For the first earthquake, we found that a positive change of TEC trends started ∼23 min before the rupture and that the anomaly reached ∼2 % of the background. These values were consistent with past events. On the other hand, medium-scale traveling ionospheric disturbance activity hampered convincing detection of changes immediately before the second earthquake.

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.