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Home seismometer for earthquake early warning
Author(s) -
Horiuchi Shigeki,
Horiuchi Yuko,
Yamamoto Shunroku,
Nakamura Hiromitsu,
Wu Changjiang,
Rydelek Paul A.,
Kachi Masaaki
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl036572
Subject(s) - seismometer , seismology , earthquake warning system , observatory , warning system , alarm , software deployment , software , geology , computer science , real time computing , telecommunications , operating system , engineering , electrical engineering , physics , astrophysics
The Japan Meteorological Agency (JMA) has started the practical service of Earthquake Early Warning (EEW) and a very dense deployment of receiving units is expected in the near future. The receiving/alarm unit of an EEW system is equipped with a CPU and memory and is on‐line via the internet. By adding an inexpensive seismometer and A/D converter, this unit is transformed into a real‐time seismic observatory, which we are calling a home seismometer. If the home seismometer is incorporated in the standard receiving unit of EEW, then the number of seismic observatories will be drastically increased. Since the background noise inside a house caused by human activity may be very large, we have developed specialized software for on‐site warning using the home seismometer. We tested our software and found that our algorithm can correctly distinguish between noise and earthquakes for nearly all the events.