浅层地震勘探在城市活断层探测中的应用

城市地震严重威胁着人们的生命财产安全，进入21世纪以来，世界各国开始重视对城市活断层危险性的评价工作，相继开展了一系列的地球物理勘探工作。其中，浅层人工地震勘探工作的探测效果最好，在城市地震危险性评价中发挥着重要的作用。鉴于城市背景环境干扰大的特点，为了准确识别活断层，就需要通过提高分辨率、提高信噪比、改进资料采集和处理手段等方法来解决。根据多个地区的实践经验可以得出，缩短道间距、选用合理的采集和处理方法都能提高地震反射的分辨率，从而识别出浅层活动断层。

Application of shallow seismic exploration in urban active fault detection

Urban earthquakes seriously threaten the safety of people′s lives and property.Since the beginning of the 21st century，countries around the world have begun to pay attention to the work of assessing the dangers of active faults in cities.They have successively carried out a series of geophysical prospecting work.Among them，the detection effect of shallow artificial seismic exploration works best，and played an important role in the evaluation of urban seismic risk.The interference of urban background environment was very large.In order to accurately identify active faults，and it was necessary to solve them by increasing resolution，improving signal-to-noise ratio，and improving data collection and processing methods.According to the practical experience of many regions.It can be seen that shortening the distance between tracks and choosing reasonable acquisition and processing methods can improve the resolution of seismic reflection and identify shallow active faults.