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本文根据1976年龙陵大震三次主震由南向北的迁移特征以及3次主震及其强余震活动所反映的震源时空分区特征认为,该次大震属续发性大震型,即三次主震分别位于不同的震源区,但首尾相接,且各自有前震和余震。用立交模式和深部剪切蠕滑断层对龙陵大震发生在完整的花岗岩体内作了解释。用介质相对完整、区域压力大解释了主震发生时形成复式震源,以及余震相对发育的特征。对于复式震源提出了用各震源断层长度累计总和求震级的方法。
According to the migration characteristics of the three main shocks from south to north of the 1976 Longling earthquake and the temporal-spatial distribution characteristics of the horizons reflected by the three main earthquakes and their strong aftershocks, this large earthquake is of the episodic epicenter type, that is, The three main shocks are located in different source regions, but they are connected end to end, with frontal and aftershocks respectively. The overpass model and the deep shear creep fault are explained in the complete granite body in Longling earthquake. Relatively complete medium, the regional pressure to explain the main shock occurred when the double source and aftershock relative development of the characteristics of aftershocks. For compound source, a method of accumulating total sum of earthquake magnitude with each source fault length is proposed.