Testing the performance of earthquake early warning system in northern India

Mittal, Himanshu; Wu, Yih‑Min; Sharma, Mukat Lal; Ming Yang, Benjamin; Gupta, Sushil

doi:10.1007/s11600-018-0210-6

Artykuł - szczegóły

Tytuł artykułu

Testing the performance of earthquake early warning system in northern India

Autorzy

Mittal Himanshu , Wu Yih‑Min , Sharma Mukat Lal , Ming Yang Benjamin , Gupta Sushil

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-018-0210-6

Warianty tytułu

Języki publikacji

Abstrakty

The main goal of present study is to test the functionality of an earthquake early warning (EEW) system (a life-saving tool), in India using synthesized data and recorded earthquake data from Taiwan. In recent time, India set up an EEW system in the central seismic gap along the Himalayan Belt, consisting of about 100 low-cost P-Alert instruments. The area, where these instruments are installed, is highly sensitive to the seismic risk with the potential of strong, major and great earthquakes. In the absence of recorded data from the Himalayas required for analysis of such system, we take advantage of recorded waveforms from Taiwan, to test the EEW system. We selected Taiwanese stations in good accordance with the Indian sensor network, to have a best fit in terms of inter station spacing. Finally, the recorded waveforms are passed through Earthworm software using tankplayer module. The system performs very well in terms of earthquake detection, P-wave picking, earthquake magnitude and location (using previously estimated regressions). Pd algorithm has been tested where the peak amplitude of vertical displacement is used for estimating magnitudes using previously regressed empirical relationship data. For the earthquakes located between Main Boundary Thrust and Main Central Thrust along with a matching instrumentation window, a good estimate of location, as well as magnitude is observed. The approach based on Pd for estimating magnitude works perfectly as compared to _ c approach, which is more sensitive to signal-to-noise ratio. To make it more region specific, we generated synthetic seismograms from the epicenters of historical Chamoli (1999) and Uttarkashi (1991) earthquakes at EEW stations in India and checked the functionality of EEW. While placing these earthquakes within the instrumentation window, a good approximation of earthquake location and magnitude is obtained by passing these generated waveforms. The parameters used to judge the performance of EEW system included the time taken by the system in issuing warning after the confirmation of the occurrence of damaging earthquake and the lead time (time interval between the issuing of warning and arrival of damaging earthquake ground motion at a particular location). High lead times have been obtained for the plainer regions including thickly populated regions of Gangetic plains, such as Delhi National Capital Region according to the distance from the epicenter, which are the main target of EEW system.

Słowa kluczowe

earthquake early warning EEW NCR vertical displacement Pd CSG earthworm software central seismic gap

wczesne ostrzeganie przed trzęsieniem ziemi EEW NCR RNK

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2019

Tom

Vol. 67, no. 1

Strony

59--75

Opis fizyczny

Bibliogr. 77 poz.

Twórcy

autor

Mittal Himanshu

himanshumitt10@gmail.com

Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan
Present Address: Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan

autor

Wu Yih‑Min

Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan
Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan

autor

Sharma Mukat Lal

Department of Earthquake Engineering, Indian Institute of Technology, Roorkee, India

autor

Ming Yang Benjamin

Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan

autor

Gupta Sushil

Risk Modeling and Insurance, RMSI, Noida, India

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-87bc9b5b-141c-4579-a782-e777938900c2