Magnitude
6.3
Time
2016-03-12 18:06:46 (UTC)
2016-03-12 08:06:46 HST
Nearby Cities
65km (40mi) SSE of Atka, Alaska
1542km (958mi) SSE of Anadyr’, Russia
1814km (1127mi) WSW of Anchorage, Alaska
1842km (1145mi) WSW of Knik-Fairview, Alaska
2574km (1599mi) W of Whitehorse, Canada
TSUNAMI SEISMIC INFORMATION STATEMENT NWS NATIONAL TSUNAMI WARNING CENTER PALMER AK 911 AM AKST SAT MAR 12 2016 ...THIS IS A TSUNAMI INFORMATION STATEMENT... EVALUATION ---------- * AN EARTHQUAKE HAS OCCURRED - A TSUNAMI IS NOT EXPECTED. PRELIMINARY EARTHQUAKE PARAMETERS --------------------------------- * THE FOLLOWING PARAMETERS ARE BASED ON A RAPID PRELIMINARY ASSESSMENT AND CHANGES MAY OCCUR. * MAGNITUDE 6.4 * ORIGIN TIME 0907 AKST MAR 12 2016 1007 PST MAR 12 2016 1807 UTC MAR 12 2016 * COORDINATES 51.5 NORTH 174.0 WEST * DEPTH 20 MILES * LOCATION 50 MILES S OF ATKA VILLAGE ALASKA 120 MILES SE OF ADAK ALASKA ADDITIONAL INFORMATION AND NEXT UPDATE -------------------------------------- * THE EARTHQUAKE PARAMETERS ARE BASED ON PRELIMINARY INFORMATION. * FURTHER INFORMATION WILL BE ISSUED BY THE UNITED STATES GEOLOGICAL SURVEY - EARTHQUAKE.USGS.GOV - OR THE APPROPRIATE REGIONAL SEISMIC NETWORK. * THIS WILL BE THE ONLY U.S. NATIONAL TSUNAMI WARNING CENTER MESSAGE ISSUED FOR THIS EVENT.
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.
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