Ionospheric precursors of strong earthquakes observed using six GNSS stations data during continuous five years (2011-2015)

被引：10

作者：

Eshkuvatov, H. E. ^{[1
,2
]}

Ahmedov, B. J. ^{[1
,2
,3
]}

Tillayev, Y. A. ^{[1
,2
,8
]}

Tariq, M. Arslan ^{[4
,5
,6
,7
]}

Shah, M. Ali ^{[4
]}

Liu, Libo ^{[5
,6
,7
]}

机构：

[1] Ulugh Beg Astron Inst, Astron St 33, Tashkent 100052, Uzbekistan

[2] Natl Univ Uzbekistan, Univ St 4, Tashkent 100174, Uzbekistan

[3] Natl Res Univ TIIAME, Inst Fundamental & Appl Res, Kori Niyoziy 39, Tashkent 100000, Uzbekistan

[4] Natl Ctr Phys, Ctr Earthquake Studies, Islamabad, Pakistan

[5] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China

[6] Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China

[7] Chinese Acad Sci, Inst Geol & Geophys, Heilongjiang Mohe Observ Geophys, Beijing, Peoples R China

[8] Ulugh Beg Astron Inst, Astron St 33, Tashkent 100052, Uzbekistan

来源：

GEODESY AND GEODYNAMICS | 2023年 / 14卷 / 01期

基金：

中国国家自然科学基金;

关键词：

GNSS; TEC; Earthquakes; Ionospheric precursors; TOTAL ELECTRON-CONTENT; GIM-TEC DATA; GPS-TEC; STATISTICAL-ANALYSIS; ANOMALOUS VARIATION; MAJOR EARTHQUAKES; PAKISTAN; SEPTEMBER; TASHKENT; RECEIVER;

D O I：

10.1016/j.geog.2022.04.002

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

This study reports the morphological characteristics of anomalous variations in Global Navigation Sat-ellite System Total Electron Content (GNSS-TEC) prior to the strong local earthquakes (EQ) that occurred during the period of 2011-2015. We have analyzed 20 earthquakes of magnitude M >= 5.6. A statistical technique is implemented on the data of six GNSS stations located in Tashkent, Kitab, and Maidanak in Uzbekistan, and Islamabad, Multan, Quetta in Pakistan. The results show continuous anomalous varia-tions in TEC during 24 h before the occupancy of local earthquakes. It is shown that the precursors before the occurrence of strong earthquakes, in particular of magnitude 5.7, 7.7, 7.5, 7.8 and 7.3 are detected near Eastern Uzbekistan (26 May 2013), Southwestern Pakistan (24 September 2013), Hindukush region of Afghanistan (26 October 2015), and Central Nepal (25 April 2015) and (12 May 2015), respectively. The ionospheric anomalies appearing before the strong earthquakes at six GNSS stations are registered in 14 cases (70%) out of 20 selected EQs. It is depicted that anomalies referred to as ionospheric precursors appeared about 1-7 days prior to the occurrence of strong earthquakes.(c) 2022 Editorial office of Geodesy and Geodynamics. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：65 / 79

页数：15