With surface wave or moment magnitude (Mw) greater than or equal to 6.5 and a depth no greater than 100 km, or an event for which an international warning centre issues a message. Pacific Tsunami Warning Center (P) issues; Tsunami Information Bulletins (TIB), Expanding Regional Warnings (ERW), Regional Watch/Warnings (RWW) or Indian Ocean Watch Bulletins (IO), or Local Tsunami Watch Bulletins (LTWB) or Tsunami Information Statements (TIS). Japan Meteorological Agency (J), issues Tsunami Advisory Messages for the North Pacific (NWPTA), or Indian Ocean Tsunami Watch Information Bulletins (TWI). When the West Coast/Alaska Tsunami Warning Center (A) issues a message it is also included. Epicenter, depth (from GCMT solution) and Mw from USGS (G), and Mw from PTWC (P) at action time. Height measurements from tide gauges peak to trough or half peak to trough as indicated, otherwise measurement is the greatest value for either inundation or runup depending on the event.
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