【摘要】 断层围陷波的观测特点是利用密集的地震台阵,横跨断层布设测线。可以利用爆炸震源也可以利用余震进行观测,本文分别介绍了实际观测的例子。对大地震破裂带内部的观测,测线位置通常布设在地表破裂带明显、已开挖了地震探槽、断层陡坎出露等地震地质的典型地段。利用爆炸震源激发观测断层围陷波,震源位置应尽量选择在断层带上,震源炸药量大约500kg,测线位置与震源的距离大约5—15km。断层围陷波在新破裂带和老的断层中都能形成和传播,因此该方法可以用于大震破裂带研究,也可以用于城市活断层探测。更多还原

【Abstract】 The observation of the fault zone trapped waves is based on the dense temporary seismic arrays across the faults. Both of explosion sources and aftershocks can be used for the observation. In this paper, practical examples are introduced, respectly. For the observation of the internal of rupture zones in the strong earthquakes, it is suggested that the observational lines should be located in the places of typical geological features, such as the clear surface rupture, the excavated seismic trenches, the fault scarp and etc. However, for the explosion sources, it is suggested that the explosion sources should be located nearby the fault belts. In our experiment, the explosion amount is nearly 500 kg and the distance from the observational lines to the explosion sources is 5—15km. The fault zone trapped waves can be formed and propagate in the new fractured zones and the old faults. Therefore, this method can be used for the study on the rupture zones in the strong earthquakes and also used for the active fault exploration in urban areas.更多还原