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利用阿克陶M_S6.7地震震中170 km范围内的4个台站(乌恰台、喀什台、阿图什台、喀什中继台)所记录的震源区附近53次M_S3.0以上事件的数字波形资料,采用Brune圆盘模型计算了此次地震序列的应力降,得到该序列的应力降时序变化曲线。经初步分析后认为,阿克陶M_S6.7地震序列的震源参数中矩震级,震源半径和地震矩随着震级的增大而增大,呈正相关关系。拐角频率随着震级的增大而减小,呈负相关关系。应力降值和震级呈多重标度关系,和深度的相关性并不明显。目前余震序列应力降值处于高值状态,后续有发生强余震的可能。
Using 53 events above M_S3.0 near the focal point recorded by four stations (Wuchatai, Kashta, Atushi station and Kashi relay station) within 170 km of the epicenter of the Seismic M_S6.7 earthquake in Aktau Digital waveform data, the stress drop of the earthquake sequence was calculated by using the Brune disc model, and the sequence of the stress drop of the sequence was obtained. After preliminary analysis, it is considered that the magnitude, source radius and seismic moment in the source parameters of A_Stak M_S6.7 earthquake sequence increase with the increase of magnitude, showing a positive correlation. The corner frequency decreases with the increase of magnitude, showing a negative correlation. The stress drop and magnitude are multiple scale relationships, and the depth of the correlation is not obvious. At present, the stress drop of the aftershock sequence is at a high value, followed by the possibility of strong aftershocks.