Synopsis
Strong motion earthquake warning (also known as earthquake early warning) is the rapid detection of an earthquake underway, the estimation of the ground shaking likely to result, and the issuance of an alert to people in the region where the ground shaking is likely to be hazardous. The last decade has seen rapid development of methodologies for early warning, which include the use of strong motion observations close to the epicenter to provide warnings at greater distances, the use of P-wave observations across a network to locate the event and map the distribution of likely strong ground motion, and the use of a P-wave detection at a single station to estimate the likely shaking intensity at the same station. These approaches have been listed in the order of increasing warning time, but the additional warning time comes at the expense of certainty. The earlier a warning is provided the greater the likelihood of false and missed alarms and the greater the uncertainty in the...
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Allen, R.M. (2011). Earthquakes, Early and Strong Motion Warning. In: Gupta, H.K. (eds) Encyclopedia of Solid Earth Geophysics. Encyclopedia of Earth Sciences Series. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-8702-7_202
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DOI: https://doi.org/10.1007/978-90-481-8702-7_202
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