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Erdik, Mustafa; Fahjan, Yasin M.; Özel, Oğuz; Alçık, Hakan; Mert, A.; Gül, Murat

doi:10.1023/a:1024813612271

Cited by 163 publications

(18 citation statements)

References 5 publications

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“…the Disaster Coordination Center of the Istanbul Metropolitan Municipality) in the case that anomalous bridge behaviour were detected. In the meantime, the wireless network could receive warnings from the Istanbul Earthquake Rapid Response Early Warning System (IERREWS) operated by KOERI (Erdik et al 2003b) in the event of an earthquake, and, thus, be used to coordinate early safety actions (e.g., stopping the traffic access to the bridge).…”

Section: Resultsmentioning

confidence: 99%

Wireless technologies for the monitoring of strategic civil infrastructures: an ambient vibration test on the Fatih Sultan Mehmet Suspension Bridge in Istanbul, Turkey

Picozzi

Milkereit

Zülfikar

et al. 2009

Bull Earthquake Eng

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Rapid improvements in telemetry technology and the general decrease in communication costs have raised a growing interest in low-cost wireless sensing units. This is especially the case for structural monitoring purposes, where they are becoming a more valuable alternative to conventional wired monitoring system. The main advantages associated with the use of wireless sensing unit include a considerable decrease in installation costs, decentralization of data analysis, and the possibility of broadening the functional capabilities by exploiting the use, at the same time and place, of different sensors. In this work, the design of a low-cost wireless sensing unit able both to collect, analyze, store, and communicate data and estimated parameters is presented. The suitability of a network of these low-cost wireless instruments for monitoring the vibration characteristics and dynamic properties of strategic civil infrastructures is validated during a ambient vibration recording field test on the Fatih Sultan Mehmet Bridge in Istanbul, Turkey.

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Section: Resultsmentioning

confidence: 99%

Wireless technologies for the monitoring of strategic civil infrastructures: an ambient vibration test on the Fatih Sultan Mehmet Suspension Bridge in Istanbul, Turkey

Picozzi

Milkereit

Zülfikar

et al. 2009

Bull Earthquake Eng

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“…Earthquake early warning systems (EEWS) are being adopted around the globe and are currently operating in Mexico (Espinosa-Aranda et al, 2011), Japan (Nakamura, 1988), Taiwan (Hsiao et al, 2009), Romania (Ionescu et al, 2007), California (Kuyuk, Allen, et al, 2014), and being tested in Italy (Satriano et al, 2011), South Korea (Sheen et al, 2014), Turkey (Erdik et al, 2003), and other places. Several algorithms for EEW exist, such as ElarmS (Kuyuk, Allen, et al, 2014), PRESTo (Satriano et al, 2011), Virtual Seismologist (Cua et al, 2009), OnSite (Böse et al, 2009), and UrEDAS (Nakamura and Saita, 2007).…”

Section: Introductionmentioning

confidence: 99%

Implementing the ElarmS Earthquake Early Warning Algorithm on the Israeli Seismic Network

Nof

Allen

2016

Bulletin of the Seismological Society of America

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Earthquake early warning systems (EEWS) are being operated and tested increasingly around the globe in recent years. Following the Israeli government's decision to build an EEWS in Israel, and as the Californian EEWS (ShakeAlert) moves toward its operational phase, we demonstrate implementation of one of its three algorithms, ElarmS, to the Israel region. We provide new tools and approaches for implementing and assessing ElarmS outside of California. The main challenges of this research are to identify, verify, and adjust the embedded location-dependent parameters in ElarmS to the Israeli region, utilizing an unoptimized seismic network and low seismicity rate. To this end, we run ElarmS in three different modes: (1) historical playbacks, (2) real-time continuous data processing, and (3) simulated data playbacks. These modes enable us to overcome the limitations of low seismicity rates in the region and evaluate the performance of ElarmS with the network that is currently available. We use historical playbacks to adjust the magnitude estimation equations of ElarmS. We then analyze real-time processing results and provide detailed analysis of two significant events in the region (M D 5.5 and 4.4). Finally, we provide the first case of how to use synthetic data to evaluate the performance of ElarmS. We find that alert times are mostly affected by the network geometry and also by data delays. Alerts are typically issued within 80 ms after the arrival of the required four P-wave triggers data to the system. Magnitude estimations are reliable for events with M D > 3:5 within 100 km of the Israeli network using a locally adjusted magnitude relation equation.

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“…Development of a method using the P-wave arrival is now underway to increase warning times (Wu and Kanamori, 2005). Turkey recently implemented their warning system, which triggers when the amplitude of ground motion exceeds some threshold (Erdik et al, 2003;Boese et al, 2004). In the mid-1960s, Japan Railways developed a front detection system to help prevent high-speed trains from crossing track damaged during an earthquake (Nakamura and Tucker, 1988), and since then has developed more sophisticated methods that use P-wave arrivals to determine the event magnitude and location (Nakamura, 1988(Nakamura, , 2004.…”

Section: Introductionmentioning

confidence: 99%

Magnitude-Period Scaling Relations for Japan and the Pacific Northwest: Implications for Earthquake Early Warning

Lockman

Allen

2007

Bulletin of the Seismological Society of America

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Scaling relations between the predominant period of P-wave arrivals and earthquake magnitude are explored using datasets from the Pacific Northwest and Japan, and compared with previous observations in southern California (Allen and Kanamori, 2003). We find the same scaling for events in all three geologically diverse regions. The sensitivity of the predominant period observation to magnitude can be optimized using various frequency bands for different magnitude ranges and in different regions. The ability to estimate the magnitude using the first few seconds of the P wave offers a methodology for earthquake early warning. The accuracy of magnitude estimates increases with the number of stations reporting predominant period observations. The most significant improvements in the magnitude estimate occur when the number of reporting stations increased from one to four. As in southern California, we find that the average absolute magnitude error is ϳ0.5 magnitude units when the closest four stations to the epicenter are used.

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Untitled

Cited by 163 publications

References 5 publications

Wireless technologies for the monitoring of strategic civil infrastructures: an ambient vibration test on the Fatih Sultan Mehmet Suspension Bridge in Istanbul, Turkey

Wireless technologies for the monitoring of strategic civil infrastructures: an ambient vibration test on the Fatih Sultan Mehmet Suspension Bridge in Istanbul, Turkey

Implementing the ElarmS Earthquake Early Warning Algorithm on the Israeli Seismic Network

Magnitude-Period Scaling Relations for Japan and the Pacific Northwest: Implications for Earthquake Early Warning

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