Categorized | Earthquake, News

Very strong 7.4M quake near El Salvador, no tsunami threat to Hawaii


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Magnitude
7.4

Event Time
2014-10-14 03:51:38 UTC
2014-10-13 21:51:38 UTC-06:00 at epicenter
2014-10-13 17:51:38 Hawaii Standard Time

Location
12.613°N 88.073°W depth=70.5km (43.8mi)

Nearby Cities
64km (40mi) S of Intipuca, El Salvador
83km (52mi) SSW of La Union, El Salvador
90km (56mi) SSE of San Rafael Oriente, El Salvador
90km (56mi) SE of Puerto El Triunfo, El Salvador
169km (105mi) SE of San Salvador, El Salvador

TSUNAMI INFORMATION STATEMENT NUMBER   1
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
604 PM HST MON OCT 13 2014

TO - CIVIL DEFENSE IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION REQUIRED.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

   ORIGIN TIME - 0552 PM HST 13 OCT 2014
   COORDINATES - 12.5 NORTH   88.3 WEST
   LOCATION    - OFF THE COAST OF CENTRAL AMERICA
   MAGNITUDE   - 7.4  MOMENT

EVALUATION

 BASED ON ALL AVAILABLE DATA A DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS
 NOT EXPECTED AND THERE IS NO TSUNAMI THREAT TO HAWAII. REPEAT. A
 DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS NOT EXPECTED AND THERE IS NO
 TSUNAMI THREAT TO HAWAII.

THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.

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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