Zonation of Early-Warning Capability in Beijing Capital Circle Region

Abstract eng:
The Beijing Capital Circle Region (38.5°-41.5°N, 113.5°-120°N) in North China is one of the critical regions with economic and cultural importance of seismic safety. Construction of an earthquake early warning system based on seismological networks is now underway. To optimize the network configuration for a better early warning function, as a process of planning and design, we map the early warning capability in this region based on the distribution of seismological stations, historical strong earthquakes, and seismic risk, for a 31×66 grid (with grid size 0.1º×0.1º). The distribution of seismic stations determines the warning reporting time; combining station distribution with distribution of historical earthquakes, early-warning time for the target to be protected can be calculated; areas where seismic hazard is relatively high while the EEW capability is relatively low are identified as the areas subject to the risk of destruction. This investigation can be used as a reference for urban planning, land use, and the deployment of key engineering and life-line systems, and most importantly, the upgrading of seismological networks for better early warning capability.

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