Perturbation in the Earth’s Pole due to the Recent 31 Large Earthquakes of Magnitude over 8.0

Autor:	Jai Bok Kyung, Sung Ho Na
Rok vydání:	2016
Předmět:	010504 meteorology & atmospheric sciences Large earthquakes Pole shift hypothesis 010502 geochemistry & geophysics Geodesy 01 natural sciences Perturbation (geology) Excitation Geology 0105 earth and related environmental sciences
Zdroj:	Journal of the Korean earth science society. 37:271-276
ISSN:	2287-4518 1225-6692
DOI:	10.5467/jkess.2016.37.5.271
Popis:	We present our estimate of pole shift caused by the recent 31 largest earthquakes of magnitude over 8.0. After reviewing theory of perturbation in the Earth’s rotation, each co-seismic as well as post-seismic pole shifts by the earthquakes are acquired and illustrated. A total co-seismic excitation due to these earthquakes is (x1, x2)=(-3.35, 5.89) milliarcsec, which increased about twice the initial estimation when the post-seismic deformation is considered. The single largest co-seismic excitation by 2011 Japan earthquake was (x1, x2)=(-2.06, 2.36) milliarcsec, which corresponds to 9.7 cm pole shift on the surface of the Earth.
Databáze:	OpenAIRE
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