A group velocity of seismic love surface wave and lithosphere structure in Antarctic Peninsula

ADVANCES IN POLAR SCIENCE ›› 1997, Vol. 8 ›› Issue (2-English): 96-99.

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A group velocity of seismic love surface wave and lithosphere structure in Antarctic Peninsula

Shu Peiyi¹, Hu Jiafu², Teng Jiwen³, Zhang Zhongjie³ and Jiao Chengmin³

¹Institute of Geophysics, Chinese Academy of Sciences, Beijing 100101, China ²Yunnan University, Kunming 650091, China ³Institute of Geophysics, Chinese Academy of Sciences, Beijing 100101, China

Online:1947-06-30 Published:1947-06-30
Contact: Shu Peiyi

Abstract

Abstract:

This paper is based on the surface wave seismogram of South Sandwich Island earthquake (Ms=6.4) recorded by Antarctic General Bernardo O'Higgins Station. We computed a group velocity dispersion of Love surface wave and obtained lithosphere structure by using the method of the matchedfilter frequencytime analysis and grid dispersion inversion. Our result shows that crust structure below Antarctic Peninsula may be divided into three layers and their thickness are respectively 5 km, 8 km and 10 km. Upper mantle velocity is 5.32 km/s and gradually changes into 5.11-4.9 km/s below 53 km.The mininum velocity is 4.8 km/s. It can be referred that Antarctic mantle is also of layered structure.

Key words: Antarctic Peninsula, Love surface wave, matched-filter frequency-time analysis, grid dispersion inversion

Shu Peiyi, Hu Jiafu, Teng Jiwen, Zhang Zhongjie, Jiao Chengmin. A group velocity of seismic love surface wave and lithosphere structure in Antarctic Peninsula[J]. ADVANCES IN POLAR SCIENCE, 1997, 8(2-English): 96-99.

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A group velocity of seismic love surface wave and lithosphere structure in Antarctic Peninsula

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