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講者:吳逸民 國立臺灣大學地質科學系
日期:2013/11/21
性質:演講
類別:應用科學、教育學習
語言:中文
長度:00:30:36
觀看:693
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摘要:
Taiwan is one of the leading countries in developing earthquake early warning (EEW) system. The Central Weather Bureau (CWB) is the major ...
Taiwan is one of the leading countries in developing earthquake early warning (EEW) system. The Central Weather Bureau (CWB) is the major institute to develop EEW system since 1993. The EEW system has been in operation at CWB since 2002. Comprehensive earthquake reports have been issued mostly within 25 seconds, with an average of about 19 seconds from an earthquake occurrence. At 3 km/sec for a typical crustal shear wave velocity, the CWB EEW system could provide early warning for the cities at the distance greater than 60 km from the epicenter. The National Taiwan University (NTU) starts to develop the EEW system for research purpose using low cost accelerometer since 2010. A total of 400 stations were deployed and configured in the 2013. The NTU EEW system could provide earthquake information at about 16 seconds from an earthquake occurrence. Thus, this system may provide early warning for the cities at the distance greater than 50 km from the epicenter. Additionally, the NTU EEW system also has an onsite alert function that triggers a warning sound once the incoming P waves greater then certain threshold. It could provide 3 to 6 seconds lead time before the time of peak ground acceleration (PGA) for the regions close to epicenter base on the experience of 2 June 2013 Nantou ML 6.3 earthquake.

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提供:國立自然科學博物館-「從車籠埔斷層看過去現在與未來的地震」國際學術研討會

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