Possible Lithosphere-Atmosphere-Ionosphere Coupling effects prior to the 2018 Mw=7.5 Indonesia earthquake from seismic, atmospheric and ionospheric data
Possible Lithosphere-Atmosphere-Ionosphere Coupling effects prior to the 2018 Mw=7.5 Indonesia earthquake from seismic, atmospheric and ionospheric data
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DOI：
10.1016/j.jseaes.2019.104097
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发表时间：
2020-02-01
影响因子：
3
通讯作者：
Huang, Jianping
中科院分区：
文献类型：
--
作者：
Marchetti, Dedalo;De Santis, Angelo;Huang, Jianping
在这项研究中，我们分析了岩石层大气层电离层耦合（LAIC）效应，以确定一些可能与2018年9月28日印度尼西亚发生的M-w = 7.5地震的准备阶段有关的现象，通过调查地震事件前的八个月，首先，我们发现主震前两个月开始的地震加速度。然后，对大气的一些物理性质（表层温度、气溶胶光学厚度和气柱水汽总量）的研究发现，在主震前6个月和3.7个月左右，大气异常有两次增加，其中后一次是非常有希望作为地震相关现象的候选者。此外，我们调查电离层扰动，通过分析的Swarm和，第一次，中国地震电磁卫星（CSES），磁和电子密度数据在平静的地磁时间。从不同的技术，我们发现有趣的异常集中在主震前2.7个月左右。2018年8月19日，Swarm和CSES显示夜间电子密度增强。我们批判性地讨论了这种现象可能是一种可能的震前电离层效应的可能性。最后，我们使用所有检测到的异常进行了累积分析，作为地震发生前可能发生的一系列物理现象的测试案例。通过这项研究，我们支持收集和存储大型地球地面和卫星观测数据集的有用性，这些数据集在未来可能有助于在真实的时间监测地震带以预测地震，尽管现在还没有证据表明有用的预测能力。
In this study, we analyse Lithosphere Atmosphere Ionosphere Coupling (LAIC) effects to identify some phenomena that could, possibly, be linked to the preparation phase of the M-w = 7.5 earthquake occurred in Indonesia on September 28th, 2018, by investigating the eight months preceding the seismic event.First, we find a seismic acceleration that started two months before the mainshock. Then, studying some physical properties of the atmosphere (skin temperature, total column water vapor and aerosol optical thickness), we find two increases of atmospheric anomalies about 6 and 3.7 months before the mainshock, and the latter one is very promising as a candidate for seismic-related phenomena. Furthermore, we investigate ionospheric disturbances, by analysing the Swarm and, for the first time, China Seismo-Electromagnetic Satellite (CSES), magnetic and electron density data during quiet geomagnetic time. From different techniques, we find interesting anomalies concentrated around 2.7 months before the mainshock.On August 19th, 2018, Swarm and CSES showed an enhancement of the electron density during night time. We critically discuss the possibility that such phenomenon can be a possible pre-seismic-induced ionospheric effect.Finally, we performed a cumulative analysis using all detected anomalies, as a test case for a possible chain of physical phenomena that could happen before the earthquake occurrence. With this study, we support the usefulness to collect and store large Earth ground and satellite observational dataset that in the future could be useful to monitor in real time the seismic zones to anticipate earthquakes, although nowadays, there is no evidence about useful prediction capabilities.