Structure Information Summary

Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. The predominant vulnerable building types are adobe block with concrete bond beam and mud wall construction.

Secondary Effects

Recent earthquakes in this area have caused secondary hazards such as tsunamis and landslides that might have contributed to losses.

TSUNAMI THREAT

ZCZC
WEPA40 PHEB 080856
TSUPAC

TSUNAMI MESSAGE NUMBER 7
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
0855 UTC FRI SEP 8 2017

…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 *****

THE TSUNAMI FORECAST IS UNCHANGED IN THIS MESSAGE.

 

PRELIMINARY EARTHQUAKE PARAMETERS
———————————

* MAGNITUDE 8.2
* ORIGIN TIME 0449 UTC SEP 8 2017
* COORDINATES 14.9 NORTH 94.0 WEST
* DEPTH 33 KM / 20 MILES
* LOCATION OFF THE COAST OF CHIAPAS MEXICO

 

EVALUATION
———-

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.2 OCCURRED
OFF THE COAST OF CHIAPAS, MEXICO AT 0449 UTC ON FRIDAY
SEPTEMBER 8 2017.

* 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

MEXICO.

 

* TSUNAMI WAVES REACHING 0.3 TO 1 METERS ABOVE THE TIDE LEVEL
ARE POSSIBLE FOR SOME COASTS OF

AMERICAN SAMOA… ANTARCTICA… COOK ISLANDS… ECUADOR…
EL SALVADOR… FIJI… FRENCH POLYNESIA… GUATEMALA…
KIRIBATI… NEW ZEALAND… SAMOA… TOKELAU… TUVALU…
VANUATU… AND WALLIS AND FUTUNA.

 

* TSUNAMI WAVES ARE FORECAST TO BE LESS THAN 0.3 METERS ABOVE
THE TIDE LEVEL FOR THE COASTS OF

AUSTRALIA… CHILE… CHINA… CHUUK… COLOMBIA… COSTA
RICA… GUAM… HAWAII… HONDURAS… HOWLAND AND BAKER…
INDONESIA… JAPAN… JARVIS ISLAND… JOHNSTON ATOLL…
KERMADEC ISLANDS… KOSRAE… MALAYSIA… MARSHALL
ISLANDS… MIDWAY ISLAND… NAURU… NEW CALEDONIA…
NICARAGUA… NIUE… NORTHERN MARIANAS… NORTHWESTERN
HAWAIIAN ISLANDS… PALAU… PALMYRA ISLAND… PANAMA…
PAPUA NEW GUINEA… PERU… PHILIPPINES… PITCAIRN
ISLANDS… POHNPEI… RUSSIA… SOLOMON ISLANDS…
TAIWAN… TONGA… VIETNAM… WAKE ISLAND… AND YAP.

 

* 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
AND AT LOCATIONS WITH FRINGING OR BARRIER REEFS 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 IF
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)
————————————————————
BALTRA ISLAND ECUADOR 0.5S 90.3W 0804 09/08
HIVA OA FRENCH POLYNESIA 10.0S 139.0W 1248 09/08
CHRISTMAS ISLAN KIRIBATI 2.0N 157.5W 1422 09/08
MALDEN ISLAND KIRIBATI 3.9S 154.9W 1426 09/08
FLINT ISLAND KIRIBATI 11.4S 151.8W 1426 09/08
PAPEETE FRENCH POLYNESIA 17.5S 149.6W 1450 09/08
RAPA ITI FRENCH POLYNESIA 27.6S 144.3W 1502 09/08
PENRYN ISLAND COOK ISLANDS 8.9S 157.8W 1505 09/08
TUBUAI FRENCH POLYNESIA 23.3S 149.5W 1510 09/08
RAROTONGA COOK ISLANDS 21.2S 159.8W 1609 09/08
PUKAPUKA ISLAND COOK ISLANDS 10.8S 165.9W 1619 09/08
NUKUNONU ISLAND TOKELAU 9.2S 171.8W 1652 09/08
PAGO PAGO AMERICAN SAMOA 14.3S 170.7W 1705 09/08
APIA SAMOA 13.8S 171.8W 1714 09/08
WALLIS ISLAND WALLIS AND FUTUN 13.3S 176.3W 1746 09/08
FUNAFUTI ISLAND TUVALU 7.9S 178.5E 1751 09/08
FUTUNA ISLAND WALLIS AND FUTUN 14.3S 178.2W 1812 09/08
TARAWA ISLAND KIRIBATI 1.5N 173.0E 1832 09/08
SUVA FIJI 18.1S 178.4E 1915 09/08
KAINGAROA CHATH NEW ZEALAND 43.7S 176.3W 1955 09/08
WAITANGI CHATHA NEW ZEALAND 43.9S 176.6W 1957 09/08
ESPERITU SANTO VANUATU 15.1S 167.3E 1959 09/08
ANATOM ISLAND VANUATU 20.2S 169.9E 2020 09/08
CAPE ADARE ANTARCTICA 71.0S 170.0E 2155 09/08

 

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)
————————————————————-
SANTACRUZ GALAPAGOS 0.7S 90.3W 0835 0.15M/ 0.5FT 20
ZIHUATANEJO MX 17.6N 101.6W 0627 0.21M/ 0.7FT 50
ACAJUTLA SV 13.6N 89.8W 0634 0.14M/ 0.5FT 30
BALTRA GALAPAGS EC 0.4S 90.3W 0806 0.17M/ 0.5FT 26
MANZANILLO MX 19.1N 104.3W 0710 0.24M/ 0.8FT 38
CHIAPAS MX 14.7N 92.4W 0617 0.50M/ 1.7FT 30
ACAPULCO MX 16.8N 99.9W 0635 0.72M/ 2.4FT 24
DART 32411 5.0N 90.8W 0642 0.03M/ 0.1FT 26
LAZARO CARDENAS MX 17.9N 102.2W 0646 0.14M/ 0.4FT 48
SALINA CRUZ MX 16.2N 95.2W 0635 1.01M/ 3.3FT 46
DART 43413 10.8N 100.1W 0547 0.08M/ 0.2FT 24
PUERTO ANGEL MX 15.7N 96.5W 0517 0.29M/ 1.0FT 24
HUATULCO MX 15.8N 96.1W 0514 0.69M/ 2.3FT 12

 

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.

$$