气候变化领域集成服务门户(CCPortal): Magnetic Pulsations Triggered by Microseismic Ground Motion

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DOI	10.1029/2020JB021416
	Magnetic Pulsations Triggered by Microseismic Ground Motion
	Chen C.-H.; Lin J.-Y.; Gao Y.; Lin C.-H.; Han P.; Chen C.-R.; Lin L.-C.; Huang R.; Liu J.-Y.
发表日期	2021
ISSN	21699313
卷号	126 期号:3
英文摘要	Geomagnetic pulsations with an enhanced amplitude of 0.1–1 nT in a frequency band of 0.1–0.2 Hz were observed by three three-component magnetometers. The geomagnetic pulsations exhibit slight time difference that is unusually observed within a limited area of ∼5 × 5 km2 at the northern end of Taiwan. The time difference suggests the geomagnetic pulsations are not dominated by global effects but local ones. We compare the seismic signals recorded by the cosited broadband seismometers for investigating potential mechanisms of these geomagnetic pulsations. Results from analysis of both seismic and geomagnetic data exhibit consistent source azimuths from the Pacific Ocean to the northeast of the observation sites with a wave propagation speed of ∼2.9 km/s estimated based on P-SV-type microseisms. Polarization and particle motion analyses demonstrate that the geomagnetic pulsations move with an elliptical rotation form, showing a close association with the P-SV-type microseisms. The 90° phase difference between the horizontal and vertical components of the geomagnetic signals suggests that the time-lagged geomagnetic pulsations are possibly caused by the motional induction effect after the arrivals of P-SV-type microseisms. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	magnetic pulsation; microseism; motional induction effect
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187289
作者单位	State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China; Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; Department of Earth Sciences, National Central University, Taoyuan, Taiwan; School of Civil Engineering, Hefei University of Technology, Hefei, China; Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China; Department of Space Science and Engineering, National Central University, Taoyuan, Taiwan; Department of System Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan; Center for Astronautical Physics and Engineering, National Central University, Taoyuan, Taiwan; Center for Space and Remote Sensing Research, National Central University, Taoyuan, Taiwan
推荐引用方式 GB/T 7714	Chen C.-H.,Lin J.-Y.,Gao Y.,et al. Magnetic Pulsations Triggered by Microseismic Ground Motion[J],2021,126(3).
APA	Chen C.-H..,Lin J.-Y..,Gao Y..,Lin C.-H..,Han P..,...&Liu J.-Y..(2021).Magnetic Pulsations Triggered by Microseismic Ground Motion.Journal of Geophysical Research: Solid Earth,126(3).
MLA	Chen C.-H.,et al."Magnetic Pulsations Triggered by Microseismic Ground Motion".Journal of Geophysical Research: Solid Earth 126.3(2021).