A New P‐Wave Detector via Moving Empirical Cumulative Distribution Function

Research Article| June 26, 2018 A New P‐Wave Detector via Moving Empirical Cumulative Distribution Function Junhyeon Kwon; Junhyeon Kwon aDepartment of Statistics, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea, heeseok@stats.snu.ac.kr Search for other works by this author on: GSW Google Scholar Taemin Heo; Taemin Heo bDepartment of Civil and Environmental Engineering, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea Search for other works by this author on: GSW Google Scholar Jae Kwan Kim; Jae Kwan Kim bDepartment of Civil and Environmental Engineering, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea Search for other works by this author on: GSW Google Scholar Hee‐Seok Oh Hee‐Seok Oh aDepartment of Statistics, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea, heeseok@stats.snu.ac.kr Search for other works by this author on: GSW Google Scholar Author and Article Information Junhyeon Kwon aDepartment of Statistics, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea, heeseok@stats.snu.ac.kr Taemin Heo bDepartment of Civil and Environmental Engineering, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea Jae Kwan Kim bDepartment of Civil and Environmental Engineering, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea Hee‐Seok Oh aDepartment of Statistics, Seoul National University, 1 Gwanak‐ro Gwanak‐gu, Seoul 08826, South Korea, heeseok@stats.snu.ac.kr Publisher: Seismological Society of America First Online: 26 Jun 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (4): 2080–2089. https://doi.org/10.1785/0120170307 Article history First Online: 26 Jun 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Junhyeon Kwon, Taemin Heo, Jae Kwan Kim, Hee‐Seok Oh; A New P‐Wave Detector via Moving Empirical Cumulative Distribution Function. Bulletin of the Seismological Society of America 2018;; 108 (4): 2080–2089. doi: https://doi.org/10.1785/0120170307 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Fast and accurate alarm of a seismic event is one of the most important tasks to reduce damage from earthquakes. This article proposes a new method for detection of P‐wave arrival that might be useful for a better earthquake early warning (EEW) system. As an existing method, short‐term average to long‐term average (STA/LTA) ratio is widely used to identify the onset time of earthquake using moving time windows. It calculates the averages of the absolute values of seismic wave in short and long windows and detects the outbreak of the seismic event when a ratio of them exceeds a predetermined thresholding value. The proposed method is based on the shape of moving empirical cumulative distribution function (MECDF) of absolute‐valued signal in a moving window. It requires one less window than the STA/LTA method, which alleviates the burden of optimizing window lengths while keeping similar performance. Furthermore, the MECDF method holds less parameter‐sensitive behavior in detection when the window length is not set correctly compared with the STA/LTA method. Hence, the proposed method is an alternative algorithm that facilitates the station‐wise parameter setting to detect P wave. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.