Study on Critical Slowing Down Phenomenon of Radon Concentrations in Water before the Wenchuan Ms8.0 Earthquake
详细信息
- 责任者：Yan Rui (China Earthquake Network Center ; Beijing 100045 ; China) ; Jiang Changsheng
- 刊名：Chinese Journal of Geophysics
- 出版年：2011
- 卷期：54(7)
- 关键词：汶川地震2008 ; Wenchuan earthquake 2008 ; 水氡异常 ; radon anomaly ; 龙门山断裂带 ; Longmenshan Fault Zone
- 页码：p.1817-1826
- 图表：6 illus., 29 refs.
- 分类号：0500
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In recent years, critical slowing down phenomenon have shown great potentials on the aspects of disclosing whether or not a complex dynamic system is tend to critical cataclysm. Based on the concepts of critical slowing down, the observed data of radon concentrations in water were processed in this article. Take radon concentration observation data at Longmen Mountain fault zone and nearby regions before the Wenchuan MsS. 0 earthquake on May 12, 2008 as an example, the autocorrelation coefficients and variances which can characterize critical slowing down have been calculated separately. The result indicated that radon data at different station had obviously critical slowing down phenomenon before the Wenchuan Ms8.0 earthquake, which indicated that critical slowing down phenomenon is a possible early warning signal for strong earthquakes. The introduction and study on critical slowing down theory into precursory data processing have practical significances and important scientific values to thoroughly understand precursor mechanism, todetermine the stage of precursory anomalies and to enhance earthquake prediction level.