Analyses On the Variation of the Earth's Rotation Rate Induced by the Earthquake

Gu Zhennian

Publications of the Yunnan Observatory > 1997 > 0(2): 61-67.

Gu Zhennian. Analyses On the Variation of the Earth's Rotation Rate Induced by the Earthquake[J]. Publications of the Yunnan Observatory, 1997, (2): 61-67.

Citation:

Gu Zhennian. Analyses On the Variation of the Earth's Rotation Rate Induced by the Earthquake[J]. Publications of the Yunnan Observatory, 1997, (2): 61-67.

Citation:

Gu Zhennian. Analyses On the Variation of the Earth's Rotation Rate Induced by the Earthquake[J]. Publications of the Yunnan Observatory, 1997, (2): 61-67.

PDF (270 KB)

Analyses On the Variation of the Earth's Rotation Rate Induced by the Earthquake

Gu Zhennian

Shanghai Observatory, The Chinese of Academy Sciences, Shanghai 200030

More Information

Received Date: July 15, 1996
Revised Date: October 02, 1996
Published Date: April 14, 1997

Graphical Abstract

Abstract

Abstract

The mass redistribution caused by an earthquake (EQ)induces changes of the inertia tensor of the Earth,hence exciting variation of the earth's rotation i.e change of LOD.In general,a larger earthquake produces a greater displacement filed,which has greater effects upon the earth rotational properties. Using the fault plane parameters,the epicenter location and the expression given by Dahlen as well as the step fuction,the accumulative change of the equatorial moment of the inertia of the Earth for 1977-1994 data in the Harvard table are estimated in this paper.It is shown that the change of LOD by single earthquake is independent of the size of the earthquake,which is radom ,but the accumulative effects of LOD induced by the earthquakes show the non-radomness and exhibit secular behaviour.The earthquakes speed up the Earth's spin.It might be regarded as the accelerative mechanism of the non-tidal variation.
- Earth rotation,
- Earthquake

FullText(HTML)

References (0)

Articles Related

[1]	Hu Hui, Zeng Zuoxun, Su Youjin, Fu Hong, Wang Rui. On the Forecasts of the Lushan Earthquake in 2013 [J]. Astronomical Research and Technology, 2015, 12(2): 247-252.
[2]	Hu Hui, Han Yanben, Li Yuqiang, Yin Zhiqiang, Wang Rui. A Study of the Correlation of Lunar Nodal Tides with Global High-Magnitude Earthquakes [J]. Astronomical Research and Technology, 2014, 11(3): 317-322.
[3]	SHI Jun, WANG Wei-xia, WEN Jing-xia. The Meteorological Anomalies before and afterthe Wenchuan Earthquake [J]. Astronomical Research and Technology, 2010, 7(1): 78-84.
[4]	HU Hui, LIN Hui, YIN Zhi-qiang, SU You-jin, FU Hong, HAN Yan-ben, GAO Yi-fei. Astronomical Background of the Earthquake at Wenchuan [J]. Astronomical Research and Technology, 2009, 6(2): 161-166.
[5]	HU Hui, HAN Yan-ben, YIN Zhi-qiang. Test of the Tidal Effect on Great Earthquakes All Over the World [J]. Astronomical Research and Technology, 2008, 5(4): 420-423.
[6]	HU Hui, WANG Rui, LI Xiao-ming. Force Caused by Luni-solar Tide and Earthquake [J]. Publications of the Yunnan Observatory, 2000, 0(4): 101-104.
[7]	LI Xiao-ming, HU Hui. Analysis of Earthquakes of Hualian Area in Taiwan [J]. Publications of the Yunnan Observatory, 2000, 0(1): 54-57.
[8]	GuZhennian. The Study of Excitation of the Earthquake to Earth's Rotation [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 480-483.
[9]	Li Xiaoming, Hu Hui. Analysis of the Relationship Between the Recent Major Earthquake in Yunnan and the Position f Celestial Objects [J]. Publications of the Yunnan Observatory, 1996, 0(4): 75-80.
[10]	Chen Cuixian. Preliminary Analyses of the Relationship Betweenthe Changes of L.O.D and Chinese Earthquakes ofMagnitude 8.0 in the Twentieth Century [J]. Publications of the Yunnan Observatory, 1992, 0(4): 51-53.