Magnetic Anomaly and Hypocenter Temperature Structure Dataset in Eastern Margin of Tibetan Plateau

WANG Jian1ZHANG Guangwei1LI ChunFeng2,3LIANG Shanshan4

1 Institute of Crustal Dynamics，China Earthquake Administration，Beijing 100085，China2 Department of Marine Sciences，Zhejiang University，Zhoushan 316021，China3 Laboratory of Marine Mineral Resources，Qingdao National Laboratory for Marine Science and Technology，Qingdao 266237，China4 China Earthquake Networks Center，Beijing 100045，China

DOI:10.3974/geodb.2018.08.04.V1

Published:Dec. 2018

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Key Words：

earthquake relocation,NGDC-720 model,magnetic anomaly,Curie-point depth,Crustal temperature structure,Tibetan Plateau,Chinese Journal of Geophysics

Abstract：

The eastern margin of the Tibetan Plateau is one of the most complex and intense seismic activity areas in China. Temperature is one of the key factors that indicate the brittle-plastic deformation and seismogenic layer depths distribution. Based on 6406 seismic data records from the eastern margin of the Tibetan Plateau, the 4921 of them with magnitudes >=2.0 during 2008 to 2017 were relocated, using two crustal velocity models and the double-difference relocation algorithm. Curie-point depths were estimated from the NGDC-720 magnetic anomaly. Crustal temperature structures were then calculated by incorporating surface heat flow and Curie depths based on the 1D steady thermal conduction equation. The dataset is consisted of five Excel files: (1) earthquake relocations with magnitudes >=2.0 in the eastern margin of the Tibetan Plateau during 2008 to 2017, including 4540 earthquakes with 2.0≤M<4.0 and 381 earthquakes with M≥4.0; (2) total and x, y, z-direction vector of NGDC-720 magnetic anomalies observed at 0 km; (3) xy, xz, yz, zz-direction gradient tensor of the NGDC-720 magnetic anomalies observed at 10 km, (4) Curie-point depths and average temperature gradients of the magnetic layer, and (5) crustal temperature structures for hypocenters. The dataset is archived at .xlsx data format with data size of 15.9 MB (Compressed to one single file with 15.3 MB). The analysis paper based on the dataset was published at Chinese Journal of Geophysics, Vol. 61, No. 5, 2018.

Foundation Item：

National Natural Science Foundation of China (41704086, 41776057); Ministry of Science and Technology of P. R. China (ZDJ2016-01, ZDJ2017-04)

Data Citation：

WANG Jian, ZHANG Guangwei, LI ChunFeng, LIANG Shanshan.Magnetic Anomaly and Hypocenter Temperature Structure Dataset in Eastern Margin of Tibetan Plateau[J/DB/OL]. Digital Journal of Global Change Data Repository, 2018. https://doi.org/10.3974/geodb.2018.08.04.V1.

Wang, J., Zhang, G. W., Liang, S. S. Magnetic anomaly and hypocenter temperature structure dataset in eastern margin of Qinghai-Tibet Plateau [J]. Journal of Global Change Data & Discovery, 2019, 3(3): 268–275. DOI: 10.3974/geodp.2019.03.07.

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