M 8.1 Earthquake and Tsunami (1.7 m) in Mexico on 08 Sep 2017 04:49 UTC

2017-09-08 06:03 message from NTWC

Key information extracted from original GTS message :
Evaluation

  • An earthquake with a preliminary magnitude of 8.2 occurred off the coast of chiapas MEXICO at 0449 UTC on friday SEPTEMBER 8 2017
  • TSUNAMI waves have been observed
  • Based on all available data hazardous TSUNAMI waves are forecast for some coasts
Threat Forecast

  • TSUNAMI waves reaching more than 3 meters above the tide level are possible along some coasts of mexico.
  • TSUNAMI waves reaching 0.3 to 1 meters above the tide level are possible for some coasts of AMERICAN samoa... antarctica... COOK islands... ecuador... EL salvador... fiji... FRENCH polynesia... guatemala... kiribati... NEW zealand... samoa... tokelau... tuvalu... vanuatu... and WALLIS and futuna.
  • TSUNAMI waves are forecast to be less than 0.3 meters above the tide level for the coasts of australia... chile... china... chuuk... colombia... COSTA rica... guam... hawaii... honduras... howland and baker... indonesia... japan... JARVIS island... johnston atoll... kermadec islands... kosrae... malaysia... MARSHALL islands... midway island... nauru... NEW caledonia... nicaragua... niue... NORTHERN marianas... northwestern hawaiian islands... palau... palmyra island... panama... PAPUA NEW guinea... peru... philippines... PITCAIRN islands... pohnpei... russia... SOLOMON islands... taiwan... tonga... vietnam... wake island... and yap.
  • Actual amplitudes at the coast MAY vary from forecast amplitudes due to uncertainties in the forecast and local features. in particular maximum TSUNAMI amplitudes on atolls and at locations with fringing or barrier reefs will likely be much smaller than the forecast indicates.
  • For other areas covered by this product a forecast has not yet been computed. the forecast will be expanded if necessary in subsequent products.
Tsunami Observations

  • The following are tsunami wave observations from coastal and/or deep-ocean sea level gauges at the indicated locations the maximum tsunami height is measured with respect to the normal tide level
GAUGE LOCATIONLATLONTIME (UTC)HEIGHT (m)PERIOD (min)
Salina Cruz Mx16.2-95.205: 410.4820
Pureto Angel Mx15.7-96.505: 170.2924
Huatulco Mx15.8-96.105: 140.6912