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Comparing the Performance of the NEEWS Earthquake Early Warning System Against the CWB System During the 6 February 2018 M w 6.2 Hualien Earthquake
Author(s) -
Hsu T. Y.,
Lin P. Y.,
Wang H. H.,
Chiang H. W.,
Chang Y. W.,
Kuo C. H.,
Lin C. M.,
Wen K. L.
Publication year - 2018
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2018gl078079
Subject(s) - earthquake warning system , peak ground acceleration , seismology , earthquake prediction , warning system , geology , earthquake simulation , foreshock , earthquake engineering , magnitude (astronomy) , ground motion , aftershock , engineering , telecommunications , physics , astronomy
The National Center for Research on Earthquake Engineering, Taiwan, has developed an Earthquake Early Warning System (NEEWS). The NEEWS predicts peak ground acceleration (PGA) using an on‐site approach, whereas the Central Weather Bureau (CWB), Taiwan, uses a regional approach. Earthquake alerts are issued at the NEEWS stations once PGA reaches a preassigned PGA threshold, regardless of the approach used. An earthquake with a magnitude of 6.2 and a focal depth of 10.0 km struck Hualien, in eastern Taiwan, on 6 February 2018. It resulted in 17 fatalities and 285 injuries, 4 collapsed buildings, and damage to more than 175 buildings. During the earthquake, the system performance of 28 NEEWS stations was documented. In this study, we compare and discuss the accuracy of the PGA predictions, lead times, and classification performance of both approaches.