Development of earthquake early warning system in Taiwan

[1] With the implementation of a real-time strong-motion network by the Central Weather Bureau (CWB), an earthquake early warning (EEW) system has been developed in Taiwan. In order to shorten the earthquake response time, a virtual sub-network method based on the regional early warning approach was utilized at first stage. Since 2001, this EEW system has responded to a total of 225 events with magnitude greater than 4.5 occurred inland or off the coast of Taiwan. The system is capable of issuing an earthquake report within 20 sec of its occurrence with good magnitude estimations for events up to magnitude 6.5. Currently, a P-wave method is adopted by the CWB system. Base on the results from 596 M > 4.0 earthquakes recorded by the real-time strong-motion network, we found that peak displacement amplitudes from initial P waves (P d ) can be used for the identification of M > 6.0 events. Characteristic periods τ c and τ max p of the initial P waves can be used for magnitude determination with an uncertainty less than 0.4. We expect to achieve a 10-second response time by the EEW system in Taiwan in the near future.

[1]  Hiroo Kanamori,et al.  Experiment on an Onsite Early Warning Method for the Taiwan Early Warning System , 2005 .

[2]  Hiroo Kanamori,et al.  Exploring the feasibility of on-site earthquake early warning using close-in records of the 2007 Noto Hanto earthquake , 2008 .

[3]  G. Roe,et al.  REAL-TIME SEISMOLOGY AND EARTHQUAKE DAMAGE MITIGATION , 2005 .

[4]  Osamu Kamigaichi,et al.  JMA EARTHQUAKE EARLY WARNING , 2004 .

[5]  Y. Fujinawa,et al.  An Automatic Processing System for Broadcasting Earthquake Alarms , 2005 .

[6]  Nai-Chi Hsiao,et al.  Relationships between Strong Ground Motion Peak Values and Seismic Loss during the 1999 Chi-Chi, Taiwan Earthquake , 2004 .

[7]  Nai-Chi Hsiao,et al.  Development of an integrated earthquake early warning system in Taiwan - Case for the Hualien area earthquakes , 1999 .

[8]  G. Ibarrola,et al.  Mexico City seismic alert system , 1995 .

[9]  Yih-Min Wu,et al.  Development of an Earthquake Early Warning System Using Real-Time Strong Motion Signals , 2008, Sensors.

[10]  A comparison of t c and t pmax for magnitude estimation in earthquake early warning , 2008 .

[11]  Ta-Liang Teng,et al.  A Virtual Subnetwork Approach to Earthquake Early Warning , 2002 .

[12]  Mustafa Erdik,et al.  Istanbul Earthquake Rapid Response and the Early Warning System , 2003 .

[13]  Hiroo Kanamori,et al.  Rapid Assessment of Damage Potential of Earthquakes in Taiwan from the Beginning of P Waves , 2005 .

[14]  Friedemann Wenzel,et al.  An Early Warning System for Deep Vrancea (Romania) Earthquakes , 2007 .

[15]  H. Kanamori,et al.  The Potential for Earthquake Early Warning in Southern California , 2003, Science.

[16]  Hiroo Kanamori,et al.  Real-Time Seismology and Earthquake Damage Mitigation , 2005 .

[17]  Richard M. Allen,et al.  A comparison of τc and τpmax for magnitude estimation in earthquake early warning , 2008 .

[18]  Aldo Zollo,et al.  Earthquake magnitude estimation from peak amplitudes of very early seismic signals on strong motion records , 2006 .

[19]  Richard M. Allen,et al.  Short Note The Potential for Earthquake Early Warning in Italy Using ElarmS , 2008 .

[20]  Tzay-Chyn Shin,et al.  Quick and reliable determination of magnitude for seismic early warning , 1998, Bulletin of the Seismological Society of America.

[21]  Richard M. Allen,et al.  Determination of earthquake early warning parameters, τ c and Pd, for southern California , 2007 .

[22]  Tzay-Chyn Shin,et al.  Taiwan Rapid Earthquake Information Release System , 1997 .

[23]  Li Zhao,et al.  Magnitude estimation using the first three seconds P‐wave amplitude in earthquake early warning , 2006 .

[24]  Tzay-Chyn Shin,et al.  Near Real-Time Mapping of Peak Ground Acceleration and Peak Ground Velocity Following a Strong Earthquake , 2004 .