新疆沙湾地区从一九七五年十二月二十五日至一九七六年四月底,发生小震群。一九七六年元月小震活动达最高峰,其后逐步缓慢衰减,至四月中、下旬基本趋向稳定。在近四个月的时间内,共发生小震1000多次,其中Ms≥0.8级的地震785次。一天中最高可记录到Ms≥0.8级的地震69次。整个序列中最大震级为3.6级。根据能量E=10~(11·8+1·5M)(尔格)计算,整个序列共释放能量8.7521×10~(17)尔格,约相当一次4.1级地震。 Small swarm of swarms occurred in Shawan area of ​​Xinjiang from December 25, 1975 to the end of April, 1976. In January 1976, the magnitude of minor earthquakes reached its peak, then slowly declined gradually until the middle of April and late tended to be basically stable. Over the past four months, a total of more than 1,000 minor earthquakes occurred, of which 785 were Ms≥0.8 earthquakes. Up to 69 earthquakes with Ms≥0.8 can be recorded in a day. The largest magnitude in the entire sequence is 3.6. According to the energy E = 10 ~ (11 · 8 +1.5M) (Erg), the whole sequence releases a total energy of 8.7521 × 10 ~ (17) Erg, which is equivalent to a magnitude 4.1 earthquake.