URBAN EARTHQUAKE RAPID RESPONSE AND EARLY WARNING SYSTEMS [复制链接]

Technological advances in seismic instrumentation and telecommunication permit the implementation ]>vC.iYp  
of real-time rapid response and early warning systems. During large earthquakes, such systems are p{@jM  
capable of providing from a few seconds to a few tens of seconds of warning before the arrival of |Y-{)5/5}  
strong ground shaking and enable quick reports about the damage estimates to determine where "SMRvi57T  
emergency response is most needed. An earthquake early warning and rapid response system can qLjLfJJ2  
provide the critical information needed to minimize loss of lives and property, and to direct rescue a/wg%cWG_  
operations As part of the preparations for the future earthquake in Istanbul a Rapid Response and Early .1{:Q1"S  
Warning system in the metropolitan area is in operation. For the Early Warning system ten strong e1<9:h+  
motion stations were installed as close as possible to the fault zone. Continuous on-line data from these lJHU1 gu  
stations via digital radio modem provide early warning for potentially disastrous earthquakes. Vs1H)T%  
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust
Lm-f0\(  
Early Warning algorithm, based on the exceedance of specified threshold time domain amplitude SEKR`2Zz,  
levels is implemented. The encrypted early warning signals will be communicated to the respective ^X]rFY1  
end users through a “service provider” company. The users of the early warning signal will be power B4 k5IS  
and gas companies, nuclear research facilities, critical chemical factories, subway system and several 8}M-b6RV  
high-rise buildings. Depending on the location of the earthquake (initiation of fault rupture) and the 5q^5DH_;  
recipient facility the alarm time can be as high as about 8s. For the rapid response system one hundred 4h*c{do  
18 bit-resolution strong motion accelerometers were placed in quasi-free field locations (basement of vRhI:E)So#  
small buildings) in the populated areas of the city, within an area of approximately 50x30km, to C.|.0^5  
constitute a network that will enable early damage assessment and rapid response information after a pyw]ydB  
damaging earthquake. Early response information is achieved through fast acquisition and analysis of dDg[ry  
processed data obtained from the network. A shake map and damage distribution map (using aggregate YD9|2S!G  
building inventories and fragility curves) will be automatically generated using the algorithm p=XEMVqm  
developed for this purpose. The shake and damage maps will be conveyed to the governor’s and Yt!o Hn  
mayor’s offices, fire, police and army headquarters within 3 minutes using radio modem and GPRS ge#0Q L0K  
communication