欢迎访问《地震》,

地震 ›› 2004, Vol. 24 ›› Issue (1): 104-111.

• • 上一篇    下一篇

昆仑山口西8.1级地震前电离层与磁场短期异常对比研究

丁鉴海1, 索玉成2, 余素荣1, 肖武军1   

  1. 1.中国地震局分析预报中心, 北京 100036;
    2.中国电波传播研究所, 北京 102206
  • 出版日期:2004-01-31 发布日期:2021-11-29
  • 作者简介:丁鉴海(1941-), 男, 河北定兴人, 研究员, 主要从事地震前兆及地震综合预报等研究。
  • 基金资助:
    “十五”国家科技攻关项目(2001BA601B01-05-04

Comparison study on short-term anomalies of ionosphere and geomagnetic field before Kunlunshan MS 8.1 earthquake

DING Jian-hai1, SUO Yu-cheng2, YU Su-rong1, XIAO Wu-jun1   

  1. 1. Center for Analysis and Prediction, CSB, Beijing 100036;
    2. China Research Institute of Radio Wave Propagation, Beijing 101106, China
  • Online:2004-01-31 Published:2021-11-29

摘要: 利用中国电离层台站和地磁台网资料, 总结了8.1级地震前出现的电离层f0F2(F2层临界频率)异常以及地磁低点位移、 地磁日变化异常现象。 对比研究了电离层与磁场短期异常分布及特征, 结果显示: 磁场与电离层时空异常特征有较好的一致性。 2001年10月8日出现低点位移, 其突变分界线通过震中地区; 震前1.5个月之内震中及周围地区出现地磁日变化异常, 拉萨台电离层f0F2出现明显异常。

关键词: 电离层, f0F2(F2层临界频率), 地磁低点位移, 地磁日变异常, 昆仑山口西8.1级地震

Abstract: On the basis of data observed by the ionospheric observatories and geomagnetic network in China, the ionospheric foF2 (critical frequency of F2-layer) anomaly phenomena, geomagnetic low-point displacement and diurnal-variation anomalies of geomagnetic field before Kunlunshan MS8.1 earthquake have been summarized. Anomaly distribution and characteristics of ionospheric foF2 and geomagnetic variation field have been comparatively studied. The result shows that the temporal-spatial characteristics of short-imminent anomalies of ionosphere and geomagnetic field are consistent. The geomagnetic low-point displacement appeared on Oct. 8, 2001, the boundary of sudden change passed through the epicentral area. The obvious anomalies of diurnal-variation of geomagnetic field near epicentral area and ionospheric foF2 at Lasa observation station are found within one month and half before Kunlunshan earthquake.

Key words: Ionosphere foF2 (critical frequency of F2-layer), Geomagnetic low-point displacement, Diurnal-variation anomalies of geomagnetic field, Kunlunshan MS8.1 earthquake

中图分类号: