Technological advances in seismic instrumentation and telecommunication permit the implementation >d`GNE
of real-time rapid response and early warning systems. During large earthquakes, such systems are )C"ixZ>2xQ
capable of providing from a few seconds to a few tens of seconds of warning before the arrival of QGI@ 5
strong ground shaking and enable quick reports about the damage estimates to determine where ]&H"EHC< $
emergency response is most needed. An earthquake early warning and rapid response system can OD7^*j(p`
provide the critical information needed to minimize loss of lives and property, and to direct rescue x %`YV):*
operations As part of the preparations for the future earthquake in Istanbul a Rapid Response and Early #w%-IhP
Warning system in the metropolitan area is in operation. For the Early Warning system ten strong 7[P- ;8)tq
motion stations were installed as close as possible to the fault zone. Continuous on-line data from these x2t&Wpvt
stations via digital radio modem provide early warning for potentially disastrous earthquakes. g%Tokl
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust L7 54odc
Early Warning algorithm, based on the exceedance of specified threshold time domain amplitude 05{}@tW-
levels is implemented. The encrypted early warning signals will be communicated to the respective . q
-: 3b
end users through a “service provider” company. The users of the early warning signal will be power Odwf7 >
and gas companies, nuclear research facilities, critical chemical factories, subway system and several YvN]7tcb
high-rise buildings. Depending on the location of the earthquake (initiation of fault rupture) and the ;Q, t65+Am
recipient facility the alarm time can be as high as about 8s. For the rapid response system one hundred aV7VbC
18 bit-resolution strong motion accelerometers were placed in quasi-free field locations (basement of
rR":}LA^d
small buildings) in the populated areas of the city, within an area of approximately 50x30km, to b>QdP$ >
constitute a network that will enable early damage assessment and rapid response information after a _cJ)v/]
damaging earthquake. Early response information is achieved through fast acquisition and analysis of CyLwCS{V\
processed data obtained from the network. A shake map and damage distribution map (using aggregate d+G%\qpzQ
building inventories and fragility curves) will be automatically generated using the algorithm DzMg^Kp
developed for this purpose. The shake and damage maps will be conveyed to the governor’s and 59{X;
mayor’s offices, fire, police and army headquarters within 3 minutes using radio modem and GPRS 'm`}XGUBS
communication
