Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data
To further study regional deformation characteristic in the southeast margin of Ordos Block during the period between the Alanshan M5.8 and Yuncheng M4.4 earthquake swarm, we analyze continuous GPS sites around the study area. The time-varying strain parameters removed a linear trend deviated from t...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
KeAi Communications Co., Ltd.
2016-11-01
|
Series: | Geodesy and Geodynamics |
Subjects: | |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1674984716301550 |
id |
doaj-a9edbc7b7d634e34b87e56b38ed376b8 |
---|---|
record_format |
Article |
spelling |
doaj-a9edbc7b7d634e34b87e56b38ed376b82021-04-02T10:55:24ZengKeAi Communications Co., Ltd.Geodesy and Geodynamics1674-98472016-11-017645946410.1016/j.geog.2016.09.006Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS dataRuichun Liu0Hongwei Li1Shunda Yang2Earthquake Administration of Shanxi Province, Taiyuan 030021, ChinaEarthquake Administration of Shanxi Province, Taiyuan 030021, ChinaWutai Earthquake Science and Technology Center, Xinzhou 034000, ChinaTo further study regional deformation characteristic in the southeast margin of Ordos Block during the period between the Alanshan M5.8 and Yuncheng M4.4 earthquake swarm, we analyze continuous GPS sites around the study area. The time-varying strain parameters removed a linear trend deviated from the background state in varying degrees since April, 2015, and began to turn back at the end of the year 2015, meanwhile, the maximum extension strain and shear strain have the bigger variation relative to others. The GPS measurement also shows that the eastward displacement rate of the stations decreases during 2015–2016 in varying degrees compared to 2011–2015, and the variation is closely related to its geologic structural location. The differential movement between the stations is converted into regional strain accumulation due to the fault locking. Furthermore, during 2015–2016, the maximum extension rate oriented at near NS direction obviously increased, and the maximum contraction strain direction is changed from NW to EW direction, which contributes to strengthen extension and shear strain of the NE-striking faults, it's consistent with the regional background strain state of Shanxi seismic zone, this may be an important contributor to occurrence of M4.4 earthquake swarm in Yuncheng basin.http://www.sciencedirect.com/science/article/pii/S1674984716301550Yuncheng M4.4 earthquake swarmTime-varying strainRobust least squares fitRegional deformation characteristic |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ruichun Liu Hongwei Li Shunda Yang |
spellingShingle |
Ruichun Liu Hongwei Li Shunda Yang Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data Geodesy and Geodynamics Yuncheng M4.4 earthquake swarm Time-varying strain Robust least squares fit Regional deformation characteristic |
author_facet |
Ruichun Liu Hongwei Li Shunda Yang |
author_sort |
Ruichun Liu |
title |
Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data |
title_short |
Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data |
title_full |
Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data |
title_fullStr |
Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data |
title_full_unstemmed |
Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data |
title_sort |
regional crustal deformation characteristic before 2016 yuncheng m4.4 earthquake swarm based on cmonoc continuous gps data |
publisher |
KeAi Communications Co., Ltd. |
series |
Geodesy and Geodynamics |
issn |
1674-9847 |
publishDate |
2016-11-01 |
description |
To further study regional deformation characteristic in the southeast margin of Ordos Block during the period between the Alanshan M5.8 and Yuncheng M4.4 earthquake swarm, we analyze continuous GPS sites around the study area. The time-varying strain parameters removed a linear trend deviated from the background state in varying degrees since April, 2015, and began to turn back at the end of the year 2015, meanwhile, the maximum extension strain and shear strain have the bigger variation relative to others. The GPS measurement also shows that the eastward displacement rate of the stations decreases during 2015–2016 in varying degrees compared to 2011–2015, and the variation is closely related to its geologic structural location. The differential movement between the stations is converted into regional strain accumulation due to the fault locking. Furthermore, during 2015–2016, the maximum extension rate oriented at near NS direction obviously increased, and the maximum contraction strain direction is changed from NW to EW direction, which contributes to strengthen extension and shear strain of the NE-striking faults, it's consistent with the regional background strain state of Shanxi seismic zone, this may be an important contributor to occurrence of M4.4 earthquake swarm in Yuncheng basin. |
topic |
Yuncheng M4.4 earthquake swarm Time-varying strain Robust least squares fit Regional deformation characteristic |
url |
http://www.sciencedirect.com/science/article/pii/S1674984716301550 |
work_keys_str_mv |
AT ruichunliu regionalcrustaldeformationcharacteristicbefore2016yunchengm44earthquakeswarmbasedoncmonoccontinuousgpsdata AT hongweili regionalcrustaldeformationcharacteristicbefore2016yunchengm44earthquakeswarmbasedoncmonoccontinuousgpsdata AT shundayang regionalcrustaldeformationcharacteristicbefore2016yunchengm44earthquakeswarmbasedoncmonoccontinuousgpsdata |
_version_ |
1724166349293355008 |