甘肃主动源建设发展与展望

Development and Prospects of Active-Source Construction in Gansu Province

摘要:

利用大容量气枪震源探测已成为探索地震预报新途径的一个重要发展方向，将推进经验性地震预测与物理预测的结合。祁连山、刘家峡气枪发射台的选址与建设经历曲折过程，在多方努力和帮助下，克服重重困难，最终高质量完成。祁连山气枪发射台的稳定运行，已积累了丰富的主动源气枪激发数据，并取得了多项创新性成果。新建的刘家峡气枪发射台将实现对海原断裂和西秦岭北缘深大断裂的连续监测，通过多点监测，分析强震孕育与区域应力场和介质变化的关系，开展地震危险性的分析研究。位于青藏高原东北缘强震活动强烈地区的甘肃未来计划再建设3个气枪主动源，联合祁连山、刘家峡气枪主动源，实现对青藏高原东北缘断裂带系进行主动源四维探测，对于甘肃的防震减灾和地震预测具有重要意义。

Abstract:

The use of large-capacity air-gun source detection has become an important development direction to explore new earthquake prediction methods, which will promote the combination of empirical earthquake prediction and physical prediction. The site selection and construction processes of Qilianshan and Liujiaxia air-gun launchers were complex. With the efforts and help of various parties, many difficulties were overcome and the construction was finally completed with high quality. The stable operation of the Qilian Mountain air-gun launcher has accumulated abundant data of air-gun active source in the Qilian Mountain, and many innovations have been achieved. The newly built Liujiaxia air-gun launcher will realize the continuous monitoring of the Haiyuan fault and deep and large faults in the northern edge of the West Qinling fault. Through multi-point monitoring, the relationship between strong earthquake preparation, regional stress field, and medium change was analyzed, and seismic risk analysis and research were carried out. Furthermore, there are plans to construct three air-gun active sources in Gansu Province, which is located in an area with strong earthquake activity in the northeast margin of the Qinghai Tibet Plateau. There are also plans to combine the Qilian Mountains and Liujiaxia air-gun active sources to realize the four-dimensional detection of active sources in the fault zone system on the northeast edge of the Qinghai Tibet Plateau. Implementing these plans will be greatly beneficial to earthquake prevention, disaster reduction, and earthquake prediction in Gansu Province.