震源有限性及其对地震早期预警系统的意义

Seismic finite source and its significance to earthquake early warning system(EEWS)

本文通过多个震例的假定情形,讨论了地震破裂的有限性对地震早期预警系统布局设计的重要意义。分析结果认为,地震早期预警系统对地震减灾所能发挥的作用要远大于传统地震学视角下的预期。该观点深化了目前所认为的预警台站应该适当考虑非均匀布设的认识,强调在发生较大地震时,近断层区域密集布设的预警台站可能会使地震早期预警系统更加有效。

Finite size of an earthquake rupture,one of the key concepts in modern seismology,has significant implication for the design of an earthquake early warning system(EEWS). We discussed this issue by scenario earthquake cases,arguing that an EEWS has the potential to make much greater contribution to the reduction of earthquake disasters which is far beyond the expectation in the view of traditional seismology. The discussion deepens the present understanding of the EEWS design which does not aim at a homogeneous deployment,stressing that near-fault denser earthquake early warning station deployment may make the EEWS much more effective during great earthquakes.