气候变化领域集成服务门户(CCPortal): A broadband crustal Lg wave attenuation model in Northeast China and the Korean Peninsula

CCPortal

DOI	10.6038/cjg2018L0394
	A broadband crustal Lg wave attenuation model in Northeast China and the Korean Peninsula
	Zhao LianFeng; Xie XiaoBi; Wang WeiMin; Yao ZhenXing
通讯作者	Zhao, LF (通讯作者)
发表日期	2018
ISSN	0001-5733
起始页码	856
结束页码	871
卷号	61 期号:3
英文摘要	Lg wave propagation characteristics are investigated in Northeast China and the Korean Peninsula based on seismograms from 113 crustal earthquakes that were recorded at 602 regional stations distributed throughout eastern China, South Korea, and southern Japan. Based on 22,551 vertical component waveforms, we calculate the amplitude spectra of the Lg waves, extract the single station, two-station, and two-event data, and construct a broadband Lg attenuation model between 0.05 and 10.0 Hz in Northeast China and the Korean Peninsula by using a joint tomographic method to simultaneously obtain Q, source function, and site response. Results show that the sedimentary basin areas are characterized by relatively strong Lg attenuation, whereas the volcanic mountains such as Da Hinggan Ling and Changbai mountains attenuate the Lg waves weakly. The strongest Lg attenuation regions are areas covered by sea water including Bohai Sea, Yellow Sea and Japan Sea. A thinner crust within a typical oceanic lithosphere for the Japan Sea blocks the Lg wave propagation, resulting in no signals can be observed across oceanic path from small earthquakes. We collect observations from large earthquakes with magnitude around m(b) 6.0 to obtain strong Lg attenuation within the crust of Japan Sea.
关键词	UNITED-STATES EARTHQUAKES UNDERGROUND NUCLEAR TEST REGIONAL SEISMIC PHASES EASTERN TIBETAN PLATEAU HIGH-PRECISION LOCATION MIDDLE-EAST PROPAGATION CHARACTERISTICS Q TOMOGRAPHY VELOCITY STRUCTURE LATERAL VARIATIONS
英文关键词	Lg; Q tomography; Attenuation; Northeastern China and the Korean Peninsula
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000428609900005
来源期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259185
推荐引用方式 GB/T 7714	Zhao LianFeng,Xie XiaoBi,Wang WeiMin,et al. A broadband crustal Lg wave attenuation model in Northeast China and the Korean Peninsula[J]. 中国科学院青藏高原研究所,2018,61(3).
APA	Zhao LianFeng,Xie XiaoBi,Wang WeiMin,&Yao ZhenXing.(2018).A broadband crustal Lg wave attenuation model in Northeast China and the Korean Peninsula.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(3).
MLA	Zhao LianFeng,et al."A broadband crustal Lg wave attenuation model in Northeast China and the Korean Peninsula".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.3(2018).