华北块体中等地震活动平静特征
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摘要
采用累计频度方法,对华北活动地块Ms≥5.5地震前中等地震聚集活动区的地震做了时空扫描,并对平静现象进行了定量分析,结果表明:对各Ⅱ级活动地块采用不同的扫描方法,在强震前都表现出明显的增强、平静过程,平静的时间长短与所给定的构造区域有关。本文给出了华北3个Ⅱ级活动地块的发震模式。对各活动地块分别进行了R值检验,表明3个活动地块采用不同的发震模式均具有较高的预报效能。
The time-space distribution of earthquakes of moderate earthquake in concentrated activity area before earthquakes of Ms≥5.5 in North China active block has been calculated and its quiescence phenomenon has been analyzed by use of the method of accumulative frequency. The results of different scanning methods in all second-order active blocks have reflected the process of enhancement and quiescence before strong earthquakes, which revealed that the length of seismic quiescence time was related to tectonic area. Seismogenic patterns of three second - order active blocks in North China have been put forward. Tests by R- value in three active blocks with different seismogenic patterns indicated high seismic prediction effectiveness.
The time-space distribution of earthquakes of moderate earthquake in concentrated activity area before earthquakes of Ms≥5.5 in North China active block has been calculated and its quiescence phenomenon has been analyzed by use of the method of accumulative frequency. The results of different scanning methods in all second-order active blocks have reflected the process of enhancement and quiescence before strong earthquakes, which revealed that the length of seismic quiescence time was related to tectonic area. Seismogenic patterns of three second - order active blocks in North China have been put forward. Tests by R- value in three active blocks with different seismogenic patterns indicated high seismic prediction effectiveness.
引文
韩竹军,徐杰等．2003．华北地区活动地块与强震活动[J]．中国科学(D辑),33(增刊),108～118
蒋海昆,侯海峰等2000．华北地区大范围内中等地震活动平静的统计检验及其预测意义[J]．内陆地震,14(2):97～104
焦明若,张国明．2000．地震中短期前兆某些特征的研究[J]．地震,20(3):29～36
马宗晋,傅征样,张玉珍等．1982．中国九大地震(1966～1976年)[M]．北京:地震出版社,173
马宗晋．1980．华北地壳的多(应力集中)点场与地震[J]．地震地质,2(1):39～47
Di Giovambattista R and Tyupkin Y. 2004. Seismicity patterns before the M = 5.8 2002, Palermo (Italy) earthquake: seismic quiescence and accelerating seismicity[J]. Tectonophysics, 384(1-4): 243-255
Huang Q, Oncel A O and Sobolev G A. 2002. Precursory seismicity changes associated with the MW= 7.4 1999 August 17 Izmit (Turkey) earthquake [J]. Geophysical Journal International, 151,235-242
Huang Q, Soboiev G A and Nagao T. 2001. Characteristics of the seismic quiescence and activation patterns before the M - 7.2 Kobe earthquake, January 17,1995 [J]. Tectonophysics, 337,99-116
Katsumata K and Kasahara. 1999. Precursory seismic quiescence before the 1994 Kurile earthquake (MW= 8.3) revealed by three independent seismic catalogs [J]. Pure and Applied Geophysics, 155(2-4): 443-470
Ohtake M et al. 1981. Seismicity gap near oaxaca, scuthern Mexico, as a probable precursor to large earthquake[R]. 115, 375-385
Sobolev G A, Huangm Q and Nagao T. 2002. Phases of earthquake's preparation and by chance test of seismic quiescence anomaly [J]. Journal of Geodynamics, 33, 413-424
Wiemer S and Wyss M. 1994. Seismic quiescence before the Landers (M=7) and Big Bear (M-6.5)1992 earthquakes [J]. Bull Seism Soc Am, 84, 900-916
Wyss M and Martirosyan A H. 1998. Seismic quiescence before the M 7, 1988, Spitak earthquake, Armenia [J]. Geophysical Journal International, 134(2): 329-+AUG
Wyss M and Habermann R E. 1988. Precursory seismic quiescence [J]. Pure and Applied Geophysics, 126 (2-4): 319-332
Wyss M, Shimazaki K and Urabe T. 1996. Quantitative mapping of a precursory seismic quiescence to the Izu-Oshima 1990 (M 6.5) earthquake, Japan [J]. Geophys J Int, 127,735-743
Wyss M and Habermann R E. 1998. Precursory seismic quiescence[J]. Pageoph, 126(2) : 319-332
蒋海昆,侯海峰等2000．华北地区大范围内中等地震活动平静的统计检验及其预测意义[J]．内陆地震,14(2):97～104
焦明若,张国明．2000．地震中短期前兆某些特征的研究[J]．地震,20(3):29～36
马宗晋,傅征样,张玉珍等．1982．中国九大地震(1966～1976年)[M]．北京:地震出版社,173
马宗晋．1980．华北地壳的多(应力集中)点场与地震[J]．地震地质,2(1):39～47
Di Giovambattista R and Tyupkin Y. 2004. Seismicity patterns before the M = 5.8 2002, Palermo (Italy) earthquake: seismic quiescence and accelerating seismicity[J]. Tectonophysics, 384(1-4): 243-255
Huang Q, Oncel A O and Sobolev G A. 2002. Precursory seismicity changes associated with the MW= 7.4 1999 August 17 Izmit (Turkey) earthquake [J]. Geophysical Journal International, 151,235-242
Huang Q, Soboiev G A and Nagao T. 2001. Characteristics of the seismic quiescence and activation patterns before the M - 7.2 Kobe earthquake, January 17,1995 [J]. Tectonophysics, 337,99-116
Katsumata K and Kasahara. 1999. Precursory seismic quiescence before the 1994 Kurile earthquake (MW= 8.3) revealed by three independent seismic catalogs [J]. Pure and Applied Geophysics, 155(2-4): 443-470
Ohtake M et al. 1981. Seismicity gap near oaxaca, scuthern Mexico, as a probable precursor to large earthquake[R]. 115, 375-385
Sobolev G A, Huangm Q and Nagao T. 2002. Phases of earthquake's preparation and by chance test of seismic quiescence anomaly [J]. Journal of Geodynamics, 33, 413-424
Wiemer S and Wyss M. 1994. Seismic quiescence before the Landers (M=7) and Big Bear (M-6.5)1992 earthquakes [J]. Bull Seism Soc Am, 84, 900-916
Wyss M and Martirosyan A H. 1998. Seismic quiescence before the M 7, 1988, Spitak earthquake, Armenia [J]. Geophysical Journal International, 134(2): 329-+AUG
Wyss M and Habermann R E. 1988. Precursory seismic quiescence [J]. Pure and Applied Geophysics, 126 (2-4): 319-332
Wyss M, Shimazaki K and Urabe T. 1996. Quantitative mapping of a precursory seismic quiescence to the Izu-Oshima 1990 (M 6.5) earthquake, Japan [J]. Geophys J Int, 127,735-743
Wyss M and Habermann R E. 1998. Precursory seismic quiescence[J]. Pageoph, 126(2) : 319-332
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