Magnitude
7.3
Date-Time
Monday, August 27, 2012 at 04:37:20 UTC
Sunday, August 26, 2012 at 10:37:20 PM at epicenter
Sunday, August 26, 2012 at 06:37:20 PM (HST) – Hawaii Standard (Honolulu)
Location
12.278°N, 88.528°W
Depth
20.3 km (12.6 miles)
Region
OFFSHORE EL SALVADOR
Distances
111 km (68 miles) S of Puerto El Triunfo, El Salvador
118 km (73 miles) S of Usulutan, El Salvador
123 km (76 miles) S of San Rafael Oriente, El Salvador
133 km (82 miles) S of Santiago de Maria, El Salvador
Current date and time in UTC/GMT/Z
TSUNAMI BULLETIN NUMBER 006 PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS ISSUED AT 0702Z 27 AUG 2012 THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC OCEAN AND ADJACENT SEAS...EXCEPT ALASKA...BRITISH COLUMBIA... WASHINGTON...OREGON AND CALIFORNIA. ADDITIONAL TSUNAMI MEASUREMENTS ARE REPORTED. ... TSUNAMI WARNING CANCELLATION SUPPLEMENT ... AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS ORIGIN TIME - 0437Z 27 AUG 2012 COORDINATES - 12.7 NORTH 88.5 WEST DEPTH - 54 KM LOCATION - OFF COAST OF CENTRAL AMERICA MAGNITUDE - 7.3 MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY GAUGE LOCATION LAT LON TIME AMPL PER ------------------- ----- ------ ----- --------------- ----- LA UNION SV 13.3N 87.8W 0627Z 0.02M / 0.1FT 08MIN DART 43413 10.8N 100.1W 0619Z 0.01M / 0.0FT 10MIN ACAJUTLA SV 13.6N 89.8W 0540Z 0.10M / 0.3FT 08MIN LAT - LATITUDE (N-NORTH, S-SOUTH) LON - LONGITUDE (E-EAST, W-WEST) TIME - TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME) AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL. IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT. VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT). PER - PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT. NOTE - DART MEASUREMENTS ARE FROM THE DEEP OCEAN AND THEY ARE GENERALLY MUCH SMALLER THAN WOULD BE COASTAL MEASUREMENTS AT SIMILAR LOCATIONS. THIS WILL BE THE FINAL BULLETIN ISSUED FOR THIS EVENT UNLESS ADDITIONAL INFORMATION BECOMES AVAILABLE. THE WEST COAST/ALASKA TSUNAMI WARNING CENTER WILL ISSUE PRODUCTS FOR ALASKA...BRITISH COLUMBIA...WASHINGTON...OREGON...CALIFORNIA.
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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