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XU SHAO-XIEup, WANG BI-QUANup, ZHANG GUANG-YUE(M. Lueile Jones)up2, MA XIU-FANGup, SHEN PEI-WENupers a h. 1981: THE FORESHOCK SEQUENCE OF HAICHENG EARTHQUAKE AND EARTHQUAKE SWARM--THE USE OF FORESHOCK SEQUENCES IN EARTHQUAKE PREDICTION. Acta Seismologica Sinica, 3(1): 1-10.
Citation: XU SHAO-XIEup, WANG BI-QUANup, ZHANG GUANG-YUE(M. Lueile Jones)up2, MA XIU-FANGup, SHEN PEI-WENupers a h. 1981: THE FORESHOCK SEQUENCE OF HAICHENG EARTHQUAKE AND EARTHQUAKE SWARM--THE USE OF FORESHOCK SEQUENCES IN EARTHQUAKE PREDICTION. Acta Seismologica Sinica, 3(1): 1-10.
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THE FORESHOCK SEQUENCE OF HAICHENG EARTHQUAKE AND EARTHQUAKE SWARM--THE USE OF FORESHOCK SEQUENCES IN EARTHQUAKE PREDICTION

  • 1. Institute of Geophysics, State Seismological Bureau; 2. Massachusetta Insititute of Technology

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  • Published Date: August 31, 2011
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    • Abstract
  • We have compared the Haicheng foreshock sequence with several earthquake swarms occurred in its neighborhood. Their spatial distribution of earthquakes was relatively concentrated. For the most part, the events occurred within a few kilometers from each other. The focal mechanisms are comparatively stable. However, there are several swarms in which the variations of focal mechanisms are quite obvious after the occurrence of the largest event of the sequence which would allow it to be recognized as a swarm. However, there are also swarms whose focal mechanisms are no less stable throughout the sequence as compared with that of the Haicheng foreshock sequence. So this feature could not be used to identify foreshock sequence. The temporal distributions of foreshocks and swarms are quite similar in some cases. This is again not a definite criterion for discriminating foreshocks and is only within our present ability, but is worthy of further study. Thus in general, no definite criterion for identifying foreshock sequence has been found. Only for some earthquake swarms may be recognized in their later stage.Finally, we introduced a magnitude sequence with gaps which, may be used whether a large event is still forthcoming. This method (in conjunction with other methods) could be of use in areas prone to large earthquakes immediately before a large event to improve determining the probability of a large event occurring. We also note that the temporal distribution of all the sequences showed a 12 hour recurrence pattern that corresponded with the earth tides, showing that tidal forces might be influencing foreshocks and earthquake swarm occurrence.
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    • References (1)
  • [1] Doeile M. Jones, Peter. Molar, Some characteristics of foreshocks and their possible relation——ship to earthquake prediction and premonitory slip on faults, JGR, 1979.

    [2] 许绍燮,海城地震の地震活动の特征,日本地震学会.“中国地震考察团讲论文集”,27, 1976.

    [3] 章光月(Lucile M. Jones)、王碧泉、许绍燮,海城地震前震系列的研究(地震学报待发表).

    [4] 金严等,辽宁省海城地震前震震源错动方式的一个特点,地球物理学报,19, 3, 156, 1976

    [5] 陈颙,用震源机制一致性作为描述地震活动性的新参数,地球物理学报,21, 2, 142, 1978

    [6] 魏光兴等,1976年春季山东庙岛群岛两次小震群,地震学报,2, 3, 1950

    [7] Kiyoo Mogi, Some features of recent seismic activity in and near Japan, BERI, 47, 395——427,1969

    [8] F. F. Evison, Precursory seismic sequences in New Zealand, New zealand,yournal of geology and geophysics,20,1, 129——141, 1977.

    [9] M. A. Sadovsliy, The processes preceding strong earthquakes in some regions of middle asia, Tec——tonophysics,14, 3——4, 295——307. 1972.

    [10] B.C. P'apazaehos, The time distribution of the reservoir——associated foreshocks and its importance to the prediction of the prencipal shock, BSSA, 63, 6, 1973——1978. 1973.

    [1] Doeile M. Jones, Peter. Molar, Some characteristics of foreshocks and their possible relation——ship to earthquake prediction and premonitory slip on faults, JGR, 1979.

    [2] 许绍燮,海城地震の地震活动の特征,日本地震学会.“中国地震考察团讲论文集”,27, 1976.

    [3] 章光月(Lucile M. Jones)、王碧泉、许绍燮,海城地震前震系列的研究(地震学报待发表).

    [4] 金严等,辽宁省海城地震前震震源错动方式的一个特点,地球物理学报,19, 3, 156, 1976

    [5] 陈颙,用震源机制一致性作为描述地震活动性的新参数,地球物理学报,21, 2, 142, 1978

    [6] 魏光兴等,1976年春季山东庙岛群岛两次小震群,地震学报,2, 3, 1950

    [7] Kiyoo Mogi, Some features of recent seismic activity in and near Japan, BERI, 47, 395——427,1969

    [8] F. F. Evison, Precursory seismic sequences in New Zealand, New zealand,yournal of geology and geophysics,20,1, 129——141, 1977.

    [9] M. A. Sadovsliy, The processes preceding strong earthquakes in some regions of middle asia, Tec——tonophysics,14, 3——4, 295——307. 1972.

    [10] B.C. P'apazaehos, The time distribution of the reservoir——associated foreshocks and its importance to the prediction of the prencipal shock, BSSA, 63, 6, 1973——1978. 1973.
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