Threshold-based evolutionary magnitude estimation for an earthquake early warning system in the Sichuan-Yunnan region, China.

ABSTRACT: The Sichuan-Yunnan region is one of the most seismically vulnerable areas in China. Accordingly, an earthquake early warning (EEW) system for the region is essential to reduce future earthquake hazards. This research analyses the utility of two early warning parameters (τ_c and P_d) for magnitude estimation using 273 events that occurred in the Sichuan-Yunnan region during 2007-2015. We find that τ_c can more reliably predict high-magnitude events during a short P-wave time window (PTW) but produces greater uncertainty in the low-magnitude range, whereas P_d is highly correlated with the event magnitude depending on the selection of an appropriate PTW. Here, we propose a threshold-based evolutionary magnitude estimation method based on a specific com

SUBMITTER: Wang Y 

PROVIDER: S-EPMC7713221 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature