Strong Motion Observation from Recent Destructive Earthquakes in China Mainland

2015 ◽  
Vol 724 ◽  
pp. 358-361
Author(s):  
Da Wei Lu ◽  
Zhi Bo Yang
Keyword(s):  
Warning System ◽  
Strong Motion ◽  
Chinese Mainland ◽  
Engineering Structures ◽  
Earthquake Early Warning System ◽  
Earthquake Motion ◽  
Earthquakes In China ◽  
Recent Earthquakes ◽  
Strong Motion Network ◽  
China Mainland

Strong earthquake motion observations have gathered much useful data for the seismic-resistant design of civil engineering structures, and for developing earthquake prevention technology. The performance of Chinese strong motion network has been evaluated from recent earthquakes in Chinese Mainland. To follow the new requirement of the earthquake mitigation plan, some new practice of strong motion observations are described, including rapid urban ShakeMap, earthquake early warning system.

scholarly journals Crowdsourcing an Earthquake early warning system for the Indian Subcontinent

2019 ◽  
Author(s):  
Abdul Aleem ◽  
Paul George ◽  
Prasanna Natarajan
Keyword(s):  
Indian Subcontinent ◽  
Low Cost ◽  
Warning System ◽  
Strong Motion ◽  
Deep Penetration ◽  
Ground Shaking ◽  
Earthquake Early Warning System ◽  
Ongoing Work ◽  
Motion Characteristics ◽  
Main Components

Earthquakes are potentially very destructive natural events. The risk fromearthquakes is aggravated because they are unpredictable and can cause tremendousloss of life and property within seconds, particularly in dense urban settings. Wepresent our ongoing work to develop a comprehensive earthquake early warningsystem (EEWS) for the Indian subcontinent. The impetus for this work comes fromthe fact that India has just 82 seismic stations for a land area of about 3.2 million sq.km, with no dedicated EEWS, plus low-cost accelerometers are now easily available,and smartphones have deep penetration. The planned system will use a network ofmobile smartphones and stationary low-cost MEMS-based strong motion sensors.The main components of this project are: creating a high-density network of low-costsensors, real-time transmission of data, algorithms to analyze ground shaking data,compute ground motion characteristics, and determine if the source of shaking is anearthquake.

Split Train-Induced Vibration and Seismic Wave Using Independent Component Analysis

2014 ◽  
Vol 568-570 ◽  
pp. 243-248
Author(s):  
Wen Xiang Jiang ◽  
Hai Ying Yu ◽  
Li Li Xie
Keyword(s):  
Independent Component Analysis ◽  
High Speed ◽  
Warning System ◽  
Strong Motion ◽  
Component Analysis ◽  
Independent Component ◽  
Predominant Frequency ◽  
High Speed Train ◽  
Earthquake Early Warning System ◽  
Train Induced Vibration

Strong motion stations have been constructed as a part of earthquake early warning system for high-speed train in China. They are deployed near railways and influenced by train-induced vibration. Then, picking seismic phase, estimating azimuth and extracting predominant frequency become difficult in this scenario. These procedures play a crucial role in locating earthquake, estimating its magnitude and then providing reliable warning to trains. In this paper, instantaneous mixing model was used to describe this problem and show that this influence could be removed by independent component analysis utilizing double sensors.

Could a Decentralized Onsite Earthquake Early Warning System Help in Mitigating Seismic Risk in Northeastern Italy? The Case of the 1976 Ms 6.5 Friuli Earthquake

2020 ◽  
Vol 91 (6) ◽  
pp. 3323-3333
Author(s):  
Stefano Parolai ◽  
Luca Moratto ◽  
Michele Bertoni ◽  
Chiara Scaini ◽  
Alessandro Rebez
Keyword(s):  
Real Time ◽  
Early Warning ◽  
Seismic Risk ◽  
Warning System ◽  
Strong Motion ◽  
Early Warning Systems ◽  
Earthquake Early Warning ◽  
Industrial Facilities ◽  
Earthquake Early Warning System ◽  
The Impact

Abstract In May 1976, a devastating earthquake of magnitude Ms 6.5 occurred in Friuli, Italy, resulting in 976 deaths, 2000 injured, and 60,000 homeless. It is notable that, at the time of the earthquake, only one station was installed in the affected region. The resulting lack of information, combined with a dearth of mitigation planning for responding to such events, lead to a clear picture of the impact of the disaster being available only after a few days. This region is now covered by nearly 100 seismological and strong-motion stations operating in real time. Furthermore, 30 average-cost strong-motion stations have been recently added, with the goals of improving the density of real-time ground-motion observations and measuring the level of shaking recorded at selected buildings. The final goal is to allow rapid impact estimations to be made to improve the response of civil protection authorities. Today, considering the higher density seismological network, new efforts in terms of the implementation and testing of earthquake early warning systems as a possible tool for mitigating seismic risk are certainly worthwhile. In this article, we show the results obtained by analyzing in playback and using an algorithm for decentralized onsite earthquake early warning, broadband synthetic strong-motion data calculated at 18 of the stations installed in the region, while considering the magnitude and location of the 1976 Friuli earthquake. The analysis shows that the anisotropy of the lead times is related not only to the finite nature of the source but also to the slip distribution. A reduction of 10% of injured persons appears to be possible if appropriate mitigating actions are employed, such as the development of efficient automatic procedures that improve the safety of strategic industrial facilities.

scholarly journals Trans-national earthquake early warning (EEW) in north-eastern Italy, Slovenia and Austria: first experience with PRESTo at the CE<sup>3</sup>RN network

2015 ◽  
Vol 40 ◽  
pp. 51-61 ◽  
Author(s):  
M. Picozzi ◽  
L. Elia ◽  
D. Pesaresi ◽  
A. Zollo ◽  
M. Mucciarelli ◽  
...  
Keyword(s):  
Real Time ◽  
Early Warning ◽  
Early Warning System ◽  
Data Exchange ◽  
Warning System ◽  
Strong Motion ◽  
Earthquake Early Warning ◽  
Research Network ◽  
Earthquake Early Warning System ◽  
Management Platform

Abstract. The region of central and eastern Europe is an area characterised by a relatively high seismic risk. Since 2001, to monitor the seismicity of this area, the OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale) in Italy, the Agencija Republike Slovenije za Okolje (ARSO) in Slovenia, the Zentralanstalt für Meteorologie und Geodynamik (ZAMG) in Austria, and the Università di Trieste (UniTS) have cooperated in real-time seismological data exchange. In 2014 OGS, ARSO, ZAMG and UniTS created a cooperative network named the Central and Eastern European Earthquake Research Network (CE3RN), and teamed up with the University of Naples Federico II, Italy, to implement an earthquake early warning system based on the existing networks. Since May 2014, the earthquake early warning system (EEWS) given by the integration of the PRESTo (PRobability and Evolutionary early warning SysTem) alert management platform and the CE3RN accelerometric stations has been under real-time testing in order to assess the system's performance. This work presents a preliminary analysis of the EEWS performance carried out by playing back real strong motion recordings for the 1976 Friuli earthquake (MW= 6.5). Then, the results of the first 6 months of real-time testing of the EEWS are presented and discussed.

Failure Analysis Of Buried Gas Pipelines Crossing Seismic Faults

2020 ◽  
Vol 3 (2) ◽  
pp. 781-790
Author(s):  
M. Rizwan Akram ◽  
Ali Yesilyurt ◽  
A.Can. Zulfikar ◽  
F. Göktepe
Keyword(s):  
Ground Deformation ◽  
Warning System ◽  
Strike Slip ◽  
Gas Pipelines ◽  
Steel Pipes ◽  
Seismic Fault ◽  
Fault Parameters ◽  
Dip Angle ◽  
Permanent Ground Deformation ◽  
Recent Earthquakes

Research on buried gas pipelines (BGPs) has taken an important consideration due to their failures in recent earthquakes. In permanent ground deformation (PGD) hazards, seismic faults are considered as one of the major causes of BGPs failure due to accumulation of impermissible tensile strains. In current research, four steel pipes such as X-42, X-52, X-60, and X-70 grades crossing through strike-slip, normal and reverse seismic faults have been investigated. Firstly, failure of BGPs due to change in soil-pipe parameters have been analyzed. Later, effects of seismic fault parameters such as change in dip angle and angle between pipe and fault plane are evaluated. Additionally, effects due to changing pipe class levels are also examined. The results of current study reveal that BGPs can resist until earthquake moment magnitude of 7.0 but fails above this limit under the assumed geotechnical properties of current study. In addition, strike-slip fault can trigger early damage in BGPs than normal and reverse faults. In the last stage, an early warning system is proposed based on the current procedure.&amp;nbsp;

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