A study on feasibility of earthquake early warning in Korea: Determination of locations and magnitudes of events SCIE SCOPUS KCI

Cited 2 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
A study on feasibility of earthquake early warning in Korea: Determination of locations and magnitudes of events
Author(s)
Rydelek, Paid; Kim, Kwang-Hee
Publication Year
2010-03
Abstract
The fundamental purpose of an earthquake early warning (EEW) system is to provide an advance warning/alarm of strong ground shaking from large earthquakes that will help to mitigate earthquake damage. To accomplish this goal, both the location and the size of an earthquake must be automatically estimated as rapidly as possible, i.e., essentially in real-tine. Given a sufficiently dense seismic array, such as in Korea, we have shown in a previous investigation that the location of potentially hazardous earthquakes can be quickly estimated from the arrival times of the P-waves at just two stations and the lack of arrivals at other nearby stations. Size, however, is difficult to estimate in a real-time environment where the implicit constraint is to use only several seconds of P-wave data to estimate earthquake source parameters. However, it is possible to predict the intensity of strong ground shaking from the damaging S-waves from the intensity of the observed P-waves. Here we investigate two methods for the rapid estimation of shaking intensity using the data from broadband sensors in the Korean seismic array. There is good agreement between methods for smaller events up to M similar to 5.2 but extrapolating the results to larger magnitudes is problematic; one method, however, may have an advantage in an EENV system.
ISSN
1226-4806
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4130
DOI
10.1007/s12303-010-0005-5
Bibliographic Citation
GEOSCIENCES JOURNAL, v.14, no.1, pp.41 - 47, 2010
Publisher
GEOLOGICAL SOCIETY KOREA
Subject
RUPTURE
Keywords
earthquake early warning; real-time warning; shaking intensity; earthquake hazard and mitigation
Type
Article
Language
English
Document Type
Article
Publisher
GEOLOGICAL SOCIETY KOREA
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