Advisories issued by international tsunami warning centers. The Pacific Tsunami Warning Center (P) issues: Tsunami Information Bulletins (TIB), Fixed and Expanding Regional Warnings (FRW, ERW), and Ocean-wide or Widespread Watch/Warnings (TWW) for the Pacific; Tsunami Information Bulletins (TIB), Local, Regional, and Ocean-wide Tsunami Watches (LTW, RTW, TW) for the Indian Ocean (IO) until 31 March 2013; Tsunami Information Statements (TIS), Local, Regional, and Ocean-wide Watches (LTW, RTW, TW) for the wider Caribbean (C). The Japan Meteorological Agency (J), issues: Tsunami Advisories (NWPTA) for the Northwestern Pacific; Tsunami Watch Information (TWI) for the Indian Ocean until 31 March 2013. The National Tsunami Warning Center (N - formerly A, renamed on 1 October 2013, formerly know as West Coast/Alaska Tsunami Warning Center), issues: Tsunami Information Statements (TIS), Tsunami Advisories (TA), Tsunami Watch/Warnings (TWW) for Canada, the US (including Puerto Rico, excluding Hawaii and US-affiliated Pacific Island countries), and the US/British Virgin Islands. Depth (from GCMT solution), epicenter and Mw from the USGS (G), and Mw from PTWC, NTWC, and JMA at action time. Other earthquakes with Mw greater than or equal to 6.5 and a depth no greater than 100 km, as recorded by USGS, have also been included. Wave height and period measurements from sea level gauges (g) reported as amplitude (amp), peak to trough, or greatest value for either flow depth (fd) or runup (r) as indicated. Event location (e.g. name) is derived from PTWC message(s).
The 1 April 2014 magnitude 8.2 Mw Northern Chile earthquake (19.642 S, 70.817 W, depth 20 km) occurred at 2347 UTC and generated a tsunami that was observed all over the Pacific region and caused damage locally. According to news reports, there were at least 7 dead due to the earthquake ground shaking and over 200 injured. There was tsunami port damage reported at the nearest city of Iquique, Chile, 79 km away from the epicenter and inundation along the coasts of Pisagua and Arica. In February 2010, a magnitude 8.8 Mw located near the central coast of Chile generated a tsunami that caused 156 fatalities.
According to the USGS, the 1 April 2014 earthquake off the Chilean coast occurred as a result of shallow depth thrust faulting slip on the primary plate boundary interface between the Nazca and South American plates. In the region of the earthquake, the Nazca plate subducts eastward beneath the South American plate at a rate of 65 mm/yr.
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|7) Photos, Satellite Imagery|
|9) Post-Earthquake Post-Tsunami Surveys|