TSUNAMI INFORMATION STATEMENT NUMBER 3 NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI 1259 UTC SUN NOV 13 2016 ..PTWC TSUNAMI INFORMATION STATEMENT... NOTE THE INCREASE OF EARTHQUAKE MAGNITUDE FROM MESSAGE NUMBER 1. PRELIMINARY EARTHQUAKE PARAMETERS --------------------------------- * MAGNITUDE 7.9 * ORIGIN TIME 1103 UTC NOV 13 2016 * COORDINATES 42.8 SOUTH 173.4 EAST * DEPTH 10 KM / 6 MILES * LOCATION SOUTH ISLAND OF NEW ZEALAND EVALUATION ---------- * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.9 OCCURRED IN SOUTH ISLAND, NEW ZEALAND AT 1103 UTC ON SUNDAY NOVEMBER 13 2016. * LO RECOMMENDED ACTIONS ------------------- * NEW ZEALAND CIVIL DEFENSE HAS ISSUED A TSUNAMI THREAT MESSAGE FOR THE EAST COAST OF SOUTH ISLAND. * TSUNAMI THREAT BEYOND NEW ZEALAND IS NOT EXPECTED. 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) ------------------------------------------------------------- CASTLEPOINT NZ 40.9S 176.2E 1210 0.12M/ 0.4FT 18 WELLINGTON NZ 41.3S 174.8E 1232 0.43M/ 1.4FT 16 KAIKOURA NZ 42.4S 173.7E 1140 1.47M/ 4.8FT 16 NEXT UPDATE AND ADDITIONAL INFORMATION -------------------------------------- * THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS ADDITIONAL DATA ARE 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.
Tsunami Warning issued for New Zealand.
The tsunami threat is for the east coast of all New Zealand (including Christchurch, Wellington and the Chatham islands) #eqnz pic.twitter.com/z85tsZ0e27
— MCDEM (@NZcivildefence) November 13, 2016
Animation of the tsunami wave from the 7.9 magnitude South Island earthquake in New Zealand on Sunday, November 13, 2016 (Hawaii Time).
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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