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地震 ›› 1999, Vol. 19 ›› Issue (2): 179-182.

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张北6. 2级地震地温短临异常特征①

陈沅俊, 姚宝树   

  1. 中国北京 100085 中国地震局地壳应力研究所
  • 收稿日期:1998-04-09 修回日期:1998-08-26 出版日期:1999-04-30 发布日期:2022-09-19
  • 作者简介:陈沅俊,女, 1944年2月出生,副研究员,主要从事应力场模拟、地热前兆和地震短临预报的研究。

THE FEATURES OF GEOTEMPERATURE IN SHORT-TERM PRECURSORY ANOMALIES BEFORE THE ZHANGBEI EARTHQUAKE WITH MS 6. 2

Chen Yuanjun, Yao Baoshu   

  1. Institute of Crustal Dynamics, CSB, Beijing 100085, China
  • Received:1998-04-09 Revised:1998-08-26 Online:1999-04-30 Published:2022-09-19

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摘要： 张北地震前 40天左右,在距该震中 100~ 200 km的河北阳原三马坊、北京塔院和延庆五里营地温测点先后出现典型地温短临异常,异常幅度为 0. 001~ 0. 01 ℃,据此作了一定程度的预报。在震级和震中距相近的条件下,三马坊测点在张北地震前的地温异常变化幅度仅为大同-阳高地震前的 1 /10,这可能与构造条件有关。在该地震的映震范围内有前兆反应的地温测点所占比例为 27% 。

关键词: 地温异常, 短临预报, 张北地震

Abstract: Some typical short-term precursory anomalies of the geotemperature have been ob-served about 40 days before the Zhangbei earthquake at the Sanmafang station, Yang yuan county, Hebei Province, as well as at Tayuan station in Beijing and Wuliying station, Yanqing county about 100~ 200 km away from the epicenter. Based on those observa-tions, the prediction has been made to a certain extent. The change amplitude of the geotemperature anomaly before the Zhangbei earthquake is only one-tenth of that before the Datong-Yanggao earthquake at the Sanmafang station, though both the magnitude and epicentral distance are similar. It may be related to the tectonicsetting. It should be point-ed out that the number of the geotemperature stations where the precursory anomalies ap-peared is 27 percent of the total earthquake response stations.

Key words: Geotemperature anomaly, Short-term and impending prediction, Zhangbei earthquake