Application of Astronomic Time-latitude Residuals in Earthquake Prediction

Details Application of Astronomic Time-latitude Residuals in Earthquake Prediction Application of Astronomic Time-latitude Residuals in Earthquake Prediction

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007em%26p..100..125y&link_type=abstract

Earth, Moon, and Planets, Volume 100, Issue 1-2, pp. 125-135

Astronomy and Astrophysics

Astronomy

1

Earthquake, Motion Of Groundmass, Time-Latitude Residuals

Scientific paper

After the earthquake (Ms = 6.1) occurred in Luquan county of Yunnan province on April 18, 1985, the relationship between major earthquakes and astronomical time-latitude residuals (ATLR) of a photoelectric astrolabe in Yunnan Observatory was analyzed. ATLR are the rest after deducting the effects of Earth’s whole motion from the observations of time and latitude. It was found that there appeared the anomalies of the ATLR before earthquakes which happened in and around Yunnan, a seismic active region. The reason of the anomalies is possibly from change of the plumb line due to the motion of the groundmass before earthquakes. Afterwards, using studies of the anomalous characters and laws of ATLR, we tried to provide the warning information prior to the occurrence of a few major earthquakes in the region. The significant synchronous anomalies of ATLR of the observatory appeared before the earthquake of magnitude 6.2 in Dayao county of Yunnan province, on July 21, 2003. It has been again verified that the anomalies possibly provide the prediction information for strong earthquakes around the observatory.

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