Technological advances in seismic instrumentation and telecommunication permit the implementation YZOwr72VL
of real-time rapid response and early warning systems. During large earthquakes, such systems are .Xf_U.h$*@
capable of providing from a few seconds to a few tens of seconds of warning before the arrival of ^)Y3 V-@t
strong ground shaking and enable quick reports about the damage estimates to determine where nXfz@q
emergency response is most needed. An earthquake early warning and rapid response system can ,-EN{ed
provide the critical information needed to minimize loss of lives and property, and to direct rescue ,Iz9!i
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operations As part of the preparations for the future earthquake in Istanbul a Rapid Response and Early v+sF0
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Warning system in the metropolitan area is in operation. For the Early Warning system ten strong tGl|/
motion stations were installed as close as possible to the fault zone. Continuous on-line data from these n{<@-6
stations via digital radio modem provide early warning for potentially disastrous earthquakes. -*w2<DCn
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust 0)h.[O8@>
Early Warning algorithm, based on the exceedance of specified threshold time domain amplitude "#0P*3-c
levels is implemented. The encrypted early warning signals will be communicated to the respective '
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end users through a “service provider” company. The users of the early warning signal will be power RWM~7^ JA
and gas companies, nuclear research facilities, critical chemical factories, subway system and several +ru ` Zw5,
high-rise buildings. Depending on the location of the earthquake (initiation of fault rupture) and the 3"0QW 4A
recipient facility the alarm time can be as high as about 8s. For the rapid response system one hundred 4%qmwt*p
18 bit-resolution strong motion accelerometers were placed in quasi-free field locations (basement of n2AoEbd
small buildings) in the populated areas of the city, within an area of approximately 50x30km, to a(O@E%|u
constitute a network that will enable early damage assessment and rapid response information after a KgD$P(J:[
damaging earthquake. Early response information is achieved through fast acquisition and analysis of <bCB-lG*Kb
processed data obtained from the network. A shake map and damage distribution map (using aggregate 4mp)v*z
building inventories and fragility curves) will be automatically generated using the algorithm 6K8v:yYPa
developed for this purpose. The shake and damage maps will be conveyed to the governor’s and CpX[8>&osD
mayor’s offices, fire, police and army headquarters within 3 minutes using radio modem and GPRS [{xY3WS
communication
