Technological advances in seismic instrumentation and telecommunication permit the implementation ' ah0IYe
of real-time rapid response and early warning systems. During large earthquakes, such systems are ' /* rCB
capable of providing from a few seconds to a few tens of seconds of warning before the arrival of 7CN[Z9Y^}
strong ground shaking and enable quick reports about the damage estimates to determine where |MR?8A^"
emergency response is most needed. An earthquake early warning and rapid response system can ZUI\0qh+
provide the critical information needed to minimize loss of lives and property, and to direct rescue N5_.m(:
operations As part of the preparations for the future earthquake in Istanbul a Rapid Response and Early 93eqFCF.
Warning system in the metropolitan area is in operation. For the Early Warning system ten strong F0(Sv\<::
motion stations were installed as close as possible to the fault zone. Continuous on-line data from these JBJ7k19;
stations via digital radio modem provide early warning for potentially disastrous earthquakes. e BRP%<=>D
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust ]O `
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Early Warning algorithm, based on the exceedance of specified threshold time domain amplitude ~O7(0RsCN
levels is implemented. The encrypted early warning signals will be communicated to the respective g#2X'%&+
end users through a “service provider” company. The users of the early warning signal will be power P
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and gas companies, nuclear research facilities, critical chemical factories, subway system and several 3jVm[c5%]
high-rise buildings. Depending on the location of the earthquake (initiation of fault rupture) and the s5
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recipient facility the alarm time can be as high as about 8s. For the rapid response system one hundred \ @t5S
18 bit-resolution strong motion accelerometers were placed in quasi-free field locations (basement of 5WN Z7cO
small buildings) in the populated areas of the city, within an area of approximately 50x30km, to "$V2 $
constitute a network that will enable early damage assessment and rapid response information after a ; S M^
damaging earthquake. Early response information is achieved through fast acquisition and analysis of -ZON']|<}k
processed data obtained from the network. A shake map and damage distribution map (using aggregate 1 3az [
building inventories and fragility curves) will be automatically generated using the algorithm (dt_ D
developed for this purpose. The shake and damage maps will be conveyed to the governor’s and NKh {iSLm
mayor’s offices, fire, police and army headquarters within 3 minutes using radio modem and GPRS >43yty\
communication
