Abstract
Following the recent establishment of a high-density seismic network equipped with low-cost micro-electro-mechanical system (MEMS) P-wave-alert-device (P-Alert) by the earthquake early warning (EEW) research group at the National Taiwan University, a large quantity of strong-motion records from moderate-magnitude earthquakes (ML > 6) around Taiwan has been accumulated. Using a data preprocessing scheme to recover the dynamic average embedded within the P-Alert data, we adopted an automatic baseline correction approach for the P-Alert accelerograms to determine the coseismic deformation (Cd). Comparisons between the Cd values determined using global positioning system (GPS) data, strong-motion records from the P-Alert network, and data from the Taiwan Strong Motion Instrumentation Program (TSMIP) demonstrates that the near-real-time determination of Cd values (>2 cm), which provide crucial information for seismic hazard mitigation, is possible using records from low-cost MEMS accelerometers.
Highlights
Over the past few decades, numerous studies on the determination of coseismic deformation (Cd) using strong-motion data have been published (e.g., [1,2,3,4,5,6])
These discrepancies might have been caused by the different of 0.81 cm, which is smaller than the results obtained using the global positioning system (GPS) (0034: 6.61 cm) and the Taiwan Strong Motion Instrumentation Program (TSMIP)
After using an available data preprocessing scheme to compute the original P-Alert records, we able to extract the permanent displacement based on the P-Alert data using the automatic baseline are able to extract the permanent displacement based on the P-Alert data using the automatic correction approach developed by [6]
Summary
Over the past few decades, numerous studies on the determination of coseismic deformation (Cd) using strong-motion data have been published (e.g., [1,2,3,4,5,6]). More than 680 free-field seismic stations are spread out over inland Taiwan, but only approximately 109 stations provide real-time data transmission. This station coverage is insufficient for the rapid and accurate reporting of both earthquake parameters (e.g., location and magnitude) and near-real-time shaking maps. These stations, installed on the wall of buildings, have facilitated seismological studies throughout Taiwan, for seismic hazard assessment purposes, including regional [9,10] and on-site [11] EEW systems, near-real-time shaking maps [12,13], and structural health monitoring [14]. Most of the stations in the current P-Alert network were installed on the 1st (76 percent of total station number) and 2nd (19 percent) floors of buildings, and only a few Sensors 2017, 17, 2643; doi:10.3390/s17112643 www.mdpi.com/journal/sensors and stations
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
