Over 2000 earthquakes happen every year in Japan, so that this country is often called earthquake-ridden (Government of Japan, 2006). There exists a serious problem to prevent the occurrence of earthquake-induced disasters, such as fire, short-circuits, gas leakage, etc. With the recent advent of nation-wide telecommunication networks, real-time earthquake information can be received at every h...

In the aftermath of earthquakes, tsunamis, such as the 2011 Great East Japan Tsunami, caused enormous damage around the world. With the extreme disaster events of the past, nations improved disaster preparedness and response through sensors and tsunami early warning systems. Even with system usage, however, governments still need to warn the targeted citizens – who may be anywhere within the vu...

More and more earthquake early warning systems (EEWS) are developed or currently being tested in many active seismic regions of the world. A well-known problem with real-time procedures is the parameter saturation, which may lead to magnitude underestimation for large earthquakes. In this paper, the method used to the MW9.0 Tohoku-Oki earthquake is explored with strong-motion records of the MW7...

Earthquakes are one of the most unpredictable natural hazards but recently short-lead-time Earthquake Early Warning Systems (EEWS) have become practical with a system operating in Japan and another planned for operation in California in the next year or two. A few seconds to a minute or so of early warning is achievable. For example, if appropriate, an early warning can be broadcast to enhance ...

First posted August 15, 2023 For additional information, contact: Associate Director, Natural HazardsU.S. Geological Survey12201 Sunrise Valley Dr., Mail Stop 905Reston, VA 20192Contact Pubs Warehouse Every year in the United States, natural hazards threaten lives and livelihoods, resulting thousands of casualties billions dollars damage. The U.S. Survey (USGS) Hazards Mission Area works with m...

This paper mainly introduces a set of high-speed railway earthquake early warning test system based on LabVIEW, which serves for the indoor prototype early-warning system, is used to simulate wave generation instead seismic sensors. From perspective simulation, (EEW) virtual instrument (VI) technology developed. Through and non-seismic interference are simulated, generated sent, so as carry out...