Early warning phase systems

A new method for rapid non-saturating moment tensor and estimates is based on very long-period W-phase observations between the P- and S-wave arrivals (Kanamori and Rivera 2008 and Sect. 3.2.8.6 in Bormann et al. 2013). First real-time implementations are operational at the U.S. Geological Survey s NEIC (Hayes et al. 2009) as well as at the GFZ Potsdam and the Indonesian Tsunami Early Warning System (InaTEWS) since 2011. 

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