摘要
研究了1993年若羌6.6级地震前库尔勒地震台多种形变(应力、应变)对比观测资料,结果表明,前期异常始于1990年底,主体异常始于1993年2月,震前2─4个月是异常发展的高潮期。各手段观测到的异常彼此呼应,相互印证;起始和转折变化时间,或同步一致,或相继跟随;它们的异常幅度(量级)相差较大,在10-6─10-4之间;异常形态各有特点,而又不无相似。朝向震中的应变观测元件异常最明显,而倾斜矢量异常方向都背向震中。
Various Contrastive deformation observations before the Ruojiang earthquake of 6.6 at the Kuerle seismic station are investigated. The results show that The preceding anomaiies began at the end of 1990 and the principal anomalies in February, 1993. The period of 2~4 months before the event was the anomaly peak. The anomalies obseved with various means echo and corroborate each other, their begining and turning moments syehronize or close follow each other. The amplitude of anomalies made considerable difference of 10-4~10-6, their patterns have respective speciality but are similar to each other in some wary. The elements of strain observation towand the epicenter displaid very clear anomaly while the directions of anomal tilt rectors all were beckward. Finally, this paper discusses anomaly stage dividing, complexity of precusory anomalies and the posibility of observing inevitable earthquake informarion.
出处
《地壳形变与地震》
CSCD
1995年第2期88-96,共9页
Crustal Deformation and Earthquake
基金
地震科学联合基金
关键词
地震前兆
地壳形变
震级
对比观测
Crustal deformation precursor
Ruoejiang earthquake of 6.6
contrastive observation.