贵州地震时空分布规律探析
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摘要
如果以垭都—紫云—罗甸断裂带北东侧为界将贵州省分为A、B两个区域,则:①地震在A区分布较为密集,而在B区分布较为稀散。单位国土面积上释放的地震能量,前者比后者要大一个数量级,反映两者在力学性质上存在较大差异。②A区地震释放能量在深度约5.5km处突然出现一个高达2个数量级的跃升,在深度约7 km处回落到接近跃升前的位置,而后又逐渐下降,反映该区域5.5～7 km深度地层的力学强度较低。③贵州地震释放能量总体似乎呈周期性变化,变化周期在11～15年间变动。A、B两区域地震释放能量的高峰年有此消彼长的现象,即A区出现地震活动高峰时,B区相对比较平静;而B区出现地震活动高峰时,A区相对比较平静。
If Guizhou province is divided into A and B region from the northeast Yadu-Ziyun-Luodian faulted zone,the earthquake distribution dense in A region is one order of magnitude more than B region,the difference of echanical property is reflected.The earthquake energy release in A region raises 2 order of magnitude in the depth of about 5.5km,return in the depth of 7km and falls slowly,the mechanic intensity is low in the depth of 5.5 to 7km.Generally,the variation of the released earthquake energy is periodic,the period is about 11 to 15 years.The rush year of earthquake energy released in A and B eliminate each other: when the earthquake rush year appears in A region,B region is quite,but A region is quite when the earthquake rush year appears in Bregion.
If Guizhou province is divided into A and B region from the northeast Yadu-Ziyun-Luodian faulted zone,the earthquake distribution dense in A region is one order of magnitude more than B region,the difference of echanical property is reflected.The earthquake energy release in A region raises 2 order of magnitude in the depth of about 5.5km,return in the depth of 7km and falls slowly,the mechanic intensity is low in the depth of 5.5 to 7km.Generally,the variation of the released earthquake energy is periodic,the period is about 11 to 15 years.The rush year of earthquake energy released in A and B eliminate each other: when the earthquake rush year appears in A region,B region is quite,but A region is quite when the earthquake rush year appears in Bregion.
引文
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[12]刘长海,等.华东地区中强震与太阳黑子数时间变化的呼应[J].地震地磁观测与研究,2003,24(5):57-59.
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[2]贵州省地质局.贵州主要构造体系与地震分布规律—贵州省构造体系与地震分布规律图说明书[R].1980.
[3]郭金城.贵州主要活动构造体系与地震[J].贵州科学,11(3),1993.
[4]覃子建,罗远模,王继安.贵州地震活动图像与烈度区划[J].贵州地质,11(4),1994.
[5]贵州省地震局.贵州省地震震中分布图[R].2010.
[6]毛健全,等.右江—南盘江裂谷构造格局[J].贵州地质,1999,16(3).
[7]柳淮之,等.右江裂谷初探[J].桂林冶金地质学院学报,1986,(1):9-18.
[8]柳淮之.扬子地块裂谷与微型裂陷作用[J].桂林冶金地质学院学报.1994,14(1).
[9]王砚耕,等.南盘江地区浅层地壳结构与金矿分布模式[J].贵州地质,1995,11(2).
[10]韩军青,等.谈太阳活动与我国地震的相关性[J].山西地震,1990,(4):18-23.
[11]张素欣,等.太阳活动与华北强震关系的分析[J].华北地震科学,2004,22(2):59-63.
[12]刘长海,等.华东地区中强震与太阳黑子数时间变化的呼应[J].地震地磁观测与研究,2003,24(5):57-59.
[13]杨云,等.太阳黑子活动及地球自传对江苏及邻区地震的影响分析[J].华南地震,2011,31(1):92-96.
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