林眉, 王洪水, 冀东普, 王峰吉. 菏泽-濮阳及附近地区震源深度及波速比变化[J]. 华北地震科学, 2010, 28(1): 31-35.
引用本文: 林眉, 王洪水, 冀东普, 王峰吉. 菏泽-濮阳及附近地区震源深度及波速比变化[J]. 华北地震科学, 2010, 28(1): 31-35.
LIN Mei, WANG Hong-shui, JI Dong-pu, WANG feng-ji. STUDY ON VP/VS RATIO AND FOCAL DEPTH IN HEZE-PUYANG AREA[J]. North China Earthquake Sciences, 2010, 28(1): 31-35.
Citation: LIN Mei, WANG Hong-shui, JI Dong-pu, WANG feng-ji. STUDY ON VP/VS RATIO AND FOCAL DEPTH IN HEZE-PUYANG AREA[J]. North China Earthquake Sciences, 2010, 28(1): 31-35.

菏泽-濮阳及附近地区震源深度及波速比变化

STUDY ON VP/VS RATIO AND FOCAL DEPTH IN HEZE-PUYANG AREA

  • 摘要: 计算了发生在濮阳及附近地区(35.5°~36.0°N,115.1°~115.7°E)地震的波速比,并进行T检验。结果表明,研究区内2001~2008年发生的41次ML≥2.6级地震波速比值属于正常变化。通过1970~2008年菏泽-濮阳及附近地区(35.1°~36.0°N,115.1°~115.7°E)发生的ML≥3级地震震源深度分析,发现1983年(11月7日菏泽5.9级地震前,研究区内震源深度变化大(ħ=19 km),而5.9级地震后至2008年震源深度浅(ħ=13 km)的特点。

     

    Abstract: In this paper, the wave velocity ratio in the Puyang and its surrounding area(35.1°~36.0°N, 115.1°~115.7°E) is calculated and tested with T-test. The results show that the Vp/Vs ratio of this area calculated on basis of 41 ML≥2.6 earthquakes is normal in the period of 2001-2008.The focal depth of ML≥3 earthquakes occurred in Heze-Puyang and its surrounding area(35.1°~36.0°N, 115.1°~115.7°E) from 1970 to 2008 is analyzed.The result indicates that focal depth(average of 19km) of the earthquakes occurred before Heze 1983 Ms5.9 earthquake are deeper than that(average of 13 km) of earthquakes occurred after the Heze 1983 Ms5.9 earthquake.

     

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