Hawaii Put on Tsunami Watch – Tsunami Waves Observed

TSUNAMI MESSAGE NUMBER 4

NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI

0023 UTC THU SEP 17 2015

…PTWC TSUNAMI THREAT MESSAGE…

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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.

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PRELIMINARY EARTHQUAKE PARAMETERS

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* 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

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* 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)

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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

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* 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)

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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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