TSUNAMI MESSAGE NUMBER 4
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
0023 UTC THU SEP 17 2015
...PTWC TSUNAMI THREAT MESSAGE...
**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****
THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.
NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
INFORMATION.
**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****
PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------
* MAGNITUDE 8.3
* ORIGIN TIME 2254 UTC SEP 16 2015
* COORDINATES 31.5 SOUTH 72.0 WEST
* DEPTH 10 KM / 6 MILES
* LOCATION NEAR THE COAST OF CENTRAL CHILE
EVALUATION
----------
* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.3 OCCURRED
NEAR THE COAST OF CENTRAL CHILE AT 2254 UTC ON WEDNESDAY
SEPTEMBER 16 2015.
* TSUNAMI WAVES HAVE BEEN OBSERVED.
* BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE
FORECAST FOR SOME COASTS.
TSUNAMI THREAT FORECAST
-----------------------
* TSUNAMI WAVES REACHING MORE THAN 3 METERS ABOVE THE TIDE
LEVEL ARE POSSIBLE ALONG SOME COASTS OF
CHILE.
* TSUNAMI WAVES REACHING 1 TO 3 METERS ABOVE THE TIDE LEVEL ARE
POSSIBLE ALONG SOME COASTS OF
FRENCH POLYNESIA.
* TSUNAMI WAVES REACHING 0.3 TO 1 METERS ABOVE THE TIDE LEVEL
ARE POSSIBLE FOR SOME COASTS OF
MEXICO... ECUADOR... PERU... ANTARCTICA... JAPAN... NEW
CALEDONIA... NEW ZEALAND... MARSHALL ISLANDS... FIJI... SAMOA...
AMERICAN SAMOA... COOK ISLANDS... TOKELAU... VANUATU...
KIRIBATI... JOHNSTON ISLAND... PALMYRA ISLAND... HOWLAND AND
BAKER... TONGA... WALLIS AND FUTUNA... PITCAIRN ISLANDS...
NIUE... SOLOMON ISLANDS... RUSSIA... HAWAII... AND NW HAWAIIAN
ISLANDS.
* TSUNAMI WAVES ARE FORECAST TO BE LESS THAN 0.3 METERS ABOVE
THE TIDE LEVEL FOR THE COASTS OF
EL SALVADOR... GUATEMALA... HONDURAS... COSTA RICA...
NICARAGUA... PANAMA... COLOMBIA... AUSTRALIA... PHILIPPINES...
TAIWAN... CHINA... NORTHERN MARIANAS... GUAM... PALAU... YAP...
POHNPEI... CHUUK... KOSRAE... NAURU... WAKE ISLAND... MIDWAY
ISLAND... JARVIS ISLAND... TUVALU... PAPUA NEW GUINEA...
INDONESIA... VIETNAM... MALAYSIA... AND BRUNEI.
* 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
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 AS NECESSARY
IN SUBSEQUENT PRODUCTS.
RECOMMENDED ACTIONS
-------------------
* GOVERNMENT AGENCIES RESPONSIBLE FOR THREATENED COASTAL AREAS
SHOULD TAKE ACTION TO INFORM AND INSTRUCT ANY COASTAL
POPULATIONS AT RISK IN ACCORDANCE WITH THEIR OWN EVALUATION...
PROCEDURES AND THE LEVEL OF THREAT.
* PERSONS LOCATED IN THREATENED COASTAL AREAS SHOULD STAY ALERT
FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM NATIONAL AND
LOCAL AUTHORITIES.
ESTIMATED TIMES OF ARRIVAL
--------------------------
* ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
FOR PLACES WITHIN THREATENED REGIONS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
WAVES CAN BE FIVE MINUTES TO ONE HOUR.
LOCATION REGION COORDINATES ETA(UTC)
------------------------------------------------------------
CALDERA CHILE 27.1S 70.8W 2338 09/16
ANTOFAGASTA CHILE 23.3S 70.4W 0001 09/17
TALCAHUANO CHILE 36.7S 73.1W 0002 09/17
IQUIQUE CHILE 20.2S 70.1W 0033 09/17
CORRAL CHILE 39.8S 73.5W 0033 09/17
ARICA CHILE 18.5S 70.3W 0044 09/17
MOLLENDO PERU 17.1S 72.0W 0052 09/17
SAN JUAN PERU 15.3S 75.2W 0110 09/17
GOLFO DE PENAS CHILE 47.1S 74.9W 0146 09/17
LA PUNTA PERU 12.1S 77.2W 0201 09/17
CHIMBOTE PERU 9.0S 78.8W 0255 09/17
PUERTO MONTT CHILE 41.5S 73.0W 0329 09/17
EASTER ISLAND CHILE 27.1S 109.4W 0413 09/17
BALTRA ISLAND ECUADOR 0.5S 90.3W 0500 09/17
THURSTON ISLAND ANTARCTICA 72.0S 100.0W 0542 09/17
PITCAIRN ISLAND PITCAIRN 25.1S 130.1W 0715 09/17
SALINA CRUZ MEXICO 16.5N 95.2W 0743 09/17
RIKITEA FRENCH POLYNESIA 23.1S 135.0W 0803 09/17
CABO SAN LUCAS MEXICO 22.8N 110.0W 0920 09/17
HIVA OA FRENCH POLYNESIA 10.0S 139.0W 0924 09/17
CAPE ADARE ANTARCTICA 71.0S 170.0E 0928 09/17
PAPEETE FRENCH POLYNESIA 17.5S 149.6W 1012 09/17
PUNTA ABREOJOS MEXICO 26.7N 113.6W 1034 09/17
RAROTONGA COOK ISLANDS 21.2S 159.8W 1043 09/17
FLINT ISLAND KIRIBATI 11.4S 151.8W 1055 09/17
MALDEN ISLAND KIRIBATI 3.9S 154.9W 1141 09/17
PENRYN ISLAND COOK ISLANDS 8.9S 157.8W 1147 09/17
NIUE ISLAND NIUE 19.0S 170.0W 1150 09/17
GISBORNE NEW ZEALAND 38.7S 178.0E 1215 09/17
NUKUALOFA TONGA 21.0S 175.2W 1219 09/17
PUKAPUKA ISLAND COOK ISLANDS 10.8S 165.9W 1220 09/17
EAST CAPE NEW ZEALAND 37.7S 178.5E 1221 09/17
WELLINGTON NEW ZEALAND 41.3S 174.8E 1225 09/17
PAGO PAGO AMERICAN SAMOA 14.3S 170.7W 1226 09/17
CHRISTMAS ISLAN KIRIBATI 2.0N 157.5W 1231 09/17
APIA SAMOA 13.8S 171.8W 1240 09/17
NORTH CAPE NEW ZEALAND 34.4S 173.3E 1247 09/17
NAPIER NEW ZEALAND 39.5S 176.9E 1257 09/17
WALLIS ISLAND WALLIS AND FUTUN 13.3S 176.3W 1300 09/17
NUKUNONU ISLAND TOKELAU 9.2S 171.8W 1302 09/17
FUTUNA ISLAND WALLIS AND FUTUN 14.3S 178.2W 1323 09/17
PALMYRA ISLAND PALMYRA ISLAND 5.9N 162.1W 1325 09/17
AUCKLAND EAST NEW ZEALAND 36.7S 175.0E 1338 09/17
SUVA FIJI 18.1S 178.4E 1339 09/17
KANTON ISLAND KIRIBATI 2.8S 171.7W 1342 09/17
ANATOM ISLAND VANUATU 20.2S 169.9E 1414 09/17
HOWLAND ISLAND HOWLAND AND BAKE 0.6N 176.6W 1426 09/17
JOHNSTON ISLAND JOHNSTON ISLAND 16.7N 169.5W 1437 09/17
NOUMEA NEW CALEDONIA 22.3S 166.5E 1454 09/17
ESPERITU SANTO VANUATU 15.1S 167.3E 1515 09/17
SANTA CRUZ ISLA SOLOMON ISLANDS 10.9S 165.9E 1539 09/17
TARAWA ISLAND KIRIBATI 1.5N 173.0E 1556 09/17
MAJURO MARSHALL ISLANDS 7.1N 171.4E 1620 09/17
KWAJALEIN MARSHALL ISLANDS 8.7N 167.7E 1647 09/17
ENIWETOK MARSHALL ISLANDS 11.4N 162.3E 1748 09/17
UST KAMCHATSK RUSSIA 56.1N 162.6E 1850 09/17
PETROPAVLOVSK RUSSIA 53.2N 159.6E 1922 09/17
URUP ISLAND RUSSIA 46.1N 150.5E 1944 09/17
KUSHIRO JAPAN 42.9N 144.3E 2028 09/17
KATSUURA JAPAN 35.1N 140.3E 2059 09/17
HACHINOHE JAPAN 40.5N 141.5E 2108 09/17
SHIMIZU JAPAN 32.8N 133.0E 2214 09/17
NOBEOKA JAPAN 32.5N 131.8E 2217 09/17
POTENTIAL IMPACTS
-----------------
* A TSUNAMI IS A SERIES OF WAVES. THE TIME BETWEEN WAVE CRESTS
CAN VARY FROM 5 MINUTES TO AN HOUR. THE HAZARD MAY PERSIST FOR
MANY HOURS OR LONGER AFTER THE INITIAL WAVE.
* IMPACTS CAN VARY SIGNIFICANTLY FROM ONE SECTION OF COAST TO
THE NEXT DUE TO LOCAL BATHYMETRY AND THE SHAPE AND ELEVATION
OF THE SHORELINE.
* IMPACTS CAN ALSO VARY DEPENDING UPON THE STATE OF THE TIDE AT
THE TIME OF THE MAXIMUM TSUNAMI WAVES.
* PERSONS CAUGHT IN THE WATER OF A TSUNAMI MAY DROWN... BE
CRUSHED BY DEBRIS IN THE WATER... OR BE SWEPT OUT TO SEA.
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)
-------------------------------------------------------------
VALPARAISO CL 33.0S 71.6W 2350 1.62M/ 5.3FT 40
CHANARAL CL 26.4S 70.6W 0010 0.67M/ 2.2FT 34
JUAN FERNANDEZ 33.6S 78.8W 0008 0.97M/ 3.2FT 08
COQUIMBO CL 30.0S 71.3W 2339 3.11M/10.2FT 20
BUCALEMU CL 34.6S 72.0W 2334 0.46M/ 1.5FT 24
CALDERA CL 27.1S 70.8W 2343 0.50M/ 1.6FT 30
SAN ANTONIO CL 33.6S 71.6W 2358 0.86M/ 2.8FT 18
DART 32402 26.7S 74.0W 2326 0.12M/ 0.4FT 36
NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------
* THE NEXT MESSAGE WILL BE ISSUED IN ONE HOUR... OR SOONER IF
THE SITUATION WARRANTS.
* 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.
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