An alternative approach for the Istanbul earthquake early warning system

Abstract Two recent catastrophic earthquakes that struck the Marmara Region on 17 August 1999 ( M w =7.4) and 12 November 1999 ( M w =7.2) caused major concern about future earthquake occurrences in Istanbul and the Marmara Region. As a result of the preparations for an expected earthquake may occur around Istanbul region, an earthquake early warning system has been established in 2002 with a simple and robust algorithm, based on the exceedance of specified thresholds of time domain amplitudes and the cumulative absolute velocity (CAV) levels (Erdik et al., 2003 [1] ). In order to improve the capability of Istanbul earthquake early warning system (IEEWS) for giving early warning of a damaging earthquake in the Marmara Region, we explored an alternative approach with the use of a period parameter ( τ c ) and a high-pass filtered vertical displacement amplitude parameter ( Pd ) from the initial 3 s of the P waveforms as proposed by Kanamori (2005) [2] and Wu and Kanamori (2005) [3,4] . The empirical relationships both between τ c and moment magnitude ( M w ), and between Pd and peak ground velocity (PGV) for the Marmara Region are presented. These relationships can be used to detect a damaging earthquake within seconds after the arrival of P waves, and can provide on-site warning in the Marmara Region.

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

[2]  Mustafa Erdik,et al.  PreSEIS: A Neural Network-Based Approach to Earthquake Early Warning for Finite Faults , 2008 .

[3]  Walter H. F. Smith,et al.  Free software helps map and display data , 1991 .

[4]  Hiroo Kanamori,et al.  Real-time seismology and earthquake hazard mitigation , 1997, Nature.

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

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

[7]  Nai-Chi Hsiao,et al.  Relationship between Peak Ground Acceleration, Peak Ground Velocity, and Intensity in Taiwan , 2003 .

[8]  Philip J. Maechling,et al.  Continuous monitoring of ground-motion parameters , 1999, Bulletin of the Seismological Society of America.

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

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

[11]  Eser Durukal,et al.  Earthquake hazard in Marmara Region, Turkey , 2004 .

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

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

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

[15]  Yih‐Min Wu,et al.  An examination of τc-Pd earthquake early warning method using a strong-motion building array , 2011 .

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

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

[18]  Mustafa Erdik,et al.  A study on warning algorithms for Istanbul earthquake early warning system , 2009 .

[19]  Friedemann Wenzel,et al.  Potential of Earthquake Early Warning Systems , 2001 .

[20]  Thomas H. Heaton,et al.  TriNet “ShakeMaps”: Rapid Generation of Peak Ground Motion and Intensity Maps for Earthquakes in Southern California , 1999 .

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

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