Technological advances in seismic instrumentation and telecommunication permit the implementation EaL+}/q&
of real-time rapid response and early warning systems. During large earthquakes, such systems are P0<uF`87
capable of providing from a few seconds to a few tens of seconds of warning before the arrival of !%=k/|#
strong ground shaking and enable quick reports about the damage estimates to determine where 81g0oVv
emergency response is most needed. An earthquake early warning and rapid response system can RmCR"~
provide the critical information needed to minimize loss of lives and property, and to direct rescue Jl}7]cVq#
operations As part of the preparations for the future earthquake in Istanbul a Rapid Response and Early s#sX r
Warning system in the metropolitan area is in operation. For the Early Warning system ten strong }=)"uv
motion stations were installed as close as possible to the fault zone. Continuous on-line data from these IR Y2H#:$
stations via digital radio modem provide early warning for potentially disastrous earthquakes. b`=rd 4cpU
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust IHfqW?
Early Warning algorithm, based on the exceedance of specified threshold time domain amplitude 9bvd1b KEW
levels is implemented. The encrypted early warning signals will be communicated to the respective AS
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end users through a “service provider” company. The users of the early warning signal will be power 8i"fhN3?Y
and gas companies, nuclear research facilities, critical chemical factories, subway system and several sk/ Mh8z
high-rise buildings. Depending on the location of the earthquake (initiation of fault rupture) and the s=+G%B'
recipient facility the alarm time can be as high as about 8s. For the rapid response system one hundred bZJiubBRI
18 bit-resolution strong motion accelerometers were placed in quasi-free field locations (basement of {[dqXG$v `
small buildings) in the populated areas of the city, within an area of approximately 50x30km, to BJTljg( {o
constitute a network that will enable early damage assessment and rapid response information after a Su^Z{ Ud`
damaging earthquake. Early response information is achieved through fast acquisition and analysis of XoOe=V?I )
processed data obtained from the network. A shake map and damage distribution map (using aggregate 3e:y?hpeL
building inventories and fragility curves) will be automatically generated using the algorithm CQ ?|=cN
developed for this purpose. The shake and damage maps will be conveyed to the governor’s and -z94>}Z=
mayor’s offices, fire, police and army headquarters within 3 minutes using radio modem and GPRS eIl&=gZ6>
communication
