The Pacific Tsunami Warning Center has issued a tsunami threat message for other parts of the Pacific located closer to the earthquake. However… based on all available data there is NO tsunami threat to Hawaii.
TSUNAMI MESSAGE NUMBER 4 NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI 2300 UTC MON NOV 21 2016 ...PTWC FINAL TSUNAMI THREAT MESSAGE... THE TSUNAMI FORECAST IS UNCHANGED IN THIS MESSAGE. PRELIMINARY EARTHQUAKE PARAMETERS --------------------------------- * MAGNITUDE 7.3 * ORIGIN TIME 2100 UTC NOV 21 2016 * COORDINATES 37.3 NORTH 141.6 EAST * DEPTH 10 KM / 6 MILES * LOCATION NEAR THE EAST COAST OF HONSHU JAPAN EVALUATION ---------- * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.3 OCCURRED NEAR THE EAST COAST OF HONSHU, JAPAN AT 2100 UTC ON MONDAY NOVEMBER 21 2016. * BASED ON ALL AVAILABLE DATA... THE TSUNAMI THREAT FROM THIS EARTHQUAKE HAS NOW PASSED. TSUNAMI THREAT FORECAST...UPDATED --------------------------------- * THE TSUNAMI THREAT HAS NOW LARGELY PASSED. RECOMMENDED ACTIONS ------------------- * GOVERNMENT AGENCIES RESPONSIBLE FOR ANY IMPACTED COASTAL AREAS SHOULD MONITOR CONDITIONS AT THE COAST TO DETERMINE IF AND WHEN IT IS SAFE TO RESUME NORMAL ACTIVITIES. * PERSONS LOCATED NEAR IMPACTED COASTAL AREAS SHOULD STAY ALERT FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM LOCAL AUTHORITIES. * REMAIN OBSERVANT AND EXERCISE NORMAL CAUTION NEAR THE SEA. POTENTIAL IMPACTS ----------------- * SEA LEVEL FLUCTUATIONS MAY CONTINUE ALONG SOME COASTS OF JAPAN OVER THE NEXT FEW HOURS. * HAZARDOUS TSUNAMI WAVES ARE NOT EXPECTED ANYWHERE OUTSIDE OF JAPAN. 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 TIME OF MAXIMUM WAVE COORDINATES MEASURE TSUNAMI PERIOD GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN) ------------------------------------------------------------- MERA JP 34.9N 139.8E 2212 0.21M/ 0.7FT 08 OFUNATO HONSHU JP 39.0N 141.8E 2207 0.28M/ 0.9FT 12 * THE JAPAN METEOROLOGICAL AGENCY REPORTS TSUNAMI AMPLITUDES OF UP TO 0.90M ALONG THE EAST COAST OF HONSHU JAPAN. NEXT UPDATE AND ADDITIONAL INFORMATION -------------------------------------- * THIS WILL BE THE FINAL STATEMENT ISSUED FOR THIS EVENT UNLESS NEW INFORMATION IS RECEIVED OR THE SITUATION CHANGES. * AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S. GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT EARTHQUAKE.USGS.GOV/EARTHQUAKES -ALL LOWER CASE-. * FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT PTWC.WEATHER.GOV AND AT WWW.TSUNAMI.GOV. * COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT PTWC.WEATHER.GOV. * COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON... BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S. NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND AT NTWC.ARH.NOAA.GOV.
USGS: How large does an earthquake have to be to cause a tsunami?
Magnitudes below 6.5
Earthquakes of this magnitude are very unlikely to trigger a tsunami.Magnitudes between 6.5 and 7.5
Earthquakes of this size do not usually produce destructive tsunamis. However, small sea level changes may be observed in the vicinity of the epicenter. Tsunamis capable of producing damage or casualties are rare in this magnitude range but have occurred due to secondary effects such as landslides or submarine slumps.Magnitudes between 7.6 and 7.8
Earthquakes of this size may produce destructive tsunamis especially near the epicenter; at greater distances small sea level changes may be observed. Tsunamis capable of producing damage at great distances are rare in the magnitude range.Magnitude 7.9 and greater
Destructive local tsunamis are possible near the epicenter, and significant sea level changes and damage may occur in a broader region.Note that with a magnitude 9.0 earthquake, the probability of an aftershock with a magnitude exceeding 7.5 is not negligible. To date, the largest aftershock recorded has been magnitude 7.1 that did not produce a damaging tsunami.
For Japan
NHK World live TV: http://www3.nhk.or.jp/nhkworld/en/live/
Tsunami Warnings / Tsunami Advisories
Issued at 12:50 JST, 22 Nov. 2016
Tsunami Advisories lifted
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Tsunami Advisories have been lifted for the following coastal regions of Japan:
IWATE PREF.
MIYAGI PREF.
FUKUSHIMA PREF.
IBARAKI PREF.
Tsunami Forecast (slight sea level changes)
Slight sea-level changes may be observed in coastal regions, but no tsunami damage is expected.
Pay attention when fishing, swimming or engaging in other marine activities, as there may still be slight sea-level changes.
No Major Tsunami Warnings, Tsunami Warnings or Advisories are currently in effect.
Animation of the forecasted tsunami waves from the 6.9 magnitude earthquake in Japan on Monday, November 21, 2016 (Hawaii Time).
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