Analysis on near Field Ground Tilt Data Anomaly before Luntai MS5.1 Earthquake in 1999, Xinjiang
详细信息
- 责任者：Sun Jianing (Earthquake Administration of Xinjiang Uygur Autonomous Region ; Urumqi 830011 ; China) ; Wen Heping
- 刊名：South China Seismological Journal
- 出版年：2009
- 卷期：29(1)
- 关键词：强震 ; strong earthquakes ; 地倾斜 ; earth tilt ; 新疆 ; Xinjiang
- 页码：p.53-60
- 图表：5 illus., 11 refs.
- 分类号：0500
- issnNo：ISSN1001-8662
- isbnNo：CN44-1266/P
摘要
The unique F-T analysis characteristic of wavelet analysis was utilized to analyze the multi-station near field ground tilt data before Luntai Ms5.1 earthquake in 1999. The results show that almost all the ground tilt stations near the epicenter recorded some similar anomaly signals within a same frequency band. The periods of the anomaly signals vary from several days to over ten days. The anomaly signals nearly appeared at the same time at different stations, mainly within 3 to 4 months before the earthquake. Spatially, the anomaly intensity increased obviously from far field to the epicenter region. These similar anomaly signals may be related to Luntai Ms5.1 earthquake in 1999.