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8.8-Magnitude Earthquake Hits Chile - TSUNAMI WARNING  

8.8-Magnitude Earthquake Hits Chile - TSUNAMI WARNING

Tsunami Warning

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Hollywood Backstage Staff Writer
Saturday, February 27, 2010

SANTIAGO, Chile (Hollywood Backstage) - Huge 8.8-Magnitude Earthquake hits Chile. A TSUNAMI has been generated. A large 7.7 foot ocean level surge has been detected in Talcahuano, Chile.

THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC OCEAN AND ADJACENT SEAS...EXCEPT ALASKA...BRITISH COLUMBIA... WASHINGTON...OREGON AND CALIFORNIA. ... A TSUNAMI WARNING AND WATCH ARE IN EFFECT

... A TSUNAMI WARNING IS IN EFFECT FOR CHILE / PERU

A TSUNAMI WATCH IS IN EFFECT FOR ECUADOR / COLOMBIA / ANTARCTICA / PANAMA / COSTA RICA FOR ALL OTHER AREAS COVERED BY THIS BULLETIN... IT IS FOR INFORMATION ONLY AT THIS TIME.

A tsunami has been observed at the following sites:

Guage Location Lat. Lon. Time Period Amplitude
IQUIQUE, Chile
20.2S
70.1W
0906Z
72min
0.27M /  0.9FT
CALDERA, Chile
27.1S
70.8W
0843Z
20min
0.45M /  1.5FT
ANTOFAGASTA, Chile 
23.2S
70.4W
0832Z
58min
0.40M /  1.3FT
TALCAHUANO, Chile
36.7S
73.4W
0652Z
88min
2.34M /  7.7FT
COQUIMBO, Chile  
30.0S
71.3W
0852Z
30min
1.32M /  4.3FT
CORRAL, Chile
39.9S
73.4W
0739Z
16min
0.90M /  2.9FT
SAN FELIX, Chile
26.3S
80.1W
0815Z
08min
0.53M /  1.7FT
VALPARAISO, Chile
33.0S
71.6W
0708Z
20min
1.29M /  4.2FT
LAT  - LATITUDE (N-NORTH, S-SOUTH)
LON  - LONGITUDE (E-EAST, W-WEST)
TIME - TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME)
PER  - PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT.
AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.

Time - Time of measurement.
Amp. - Tsunami amplitudes are measured relative to normal sea level.

It is NOT crest-to-trough wave height. Values are given in both meters (M) and feet (FT).

THE PACIFIC TSUNAMI WARNING CENTER HAS ISSUED AN EXPANDING REGIONAL TSUNAMI WARNING AND WATCH FOR PARTS OF THE PACIFIC LOCATED CLOSER TO THE EARTHQUAKE. AN EVALUATION OF THE PACIFIC WIDE TSUNAMI THREAT IS UNDERWAY AND THERE IS A POSSIBILITY THAT HAWAII COULD BE ELEVATED TO A WATCH OR WARNING STATUS. IF TSUNAMI WAVES IMPACT HAWAII THEIR ESTIMATED EARLIEST ARRIVAL TIME IS 1119 AM HST SAT 27 FEB 2010.

This earthquake occurred at the boundary between the Nazca and South American tectonic plates. The two plates are converging at a rate of 80 mm per year. The earthquake occurred as thrust-faulting on the interface between the two plates, with the Nazca plate moving down and landward below the South American plate.

Coastal Chile has a history of very large earthquakes. Since 1973, there have been 13 events of magnitude 7.0 or greater. The February 27 shock originated about 230 km north of the source region of the magnitude 9.5 earthquake of May, 1960 – the largest instrumentally recorded earthquake in the world. This magnitude 9.5 earthquake killed 1655 people in southern Chile and unleashed a tsunami that crossed the Pacific, killing 61 people in Hawaii, Japan, and the Philippines. Approximately 870 km to the north of the February 27 earthquake is the source region of the magnitude 8.5 earthquake of November, 1922. This great quake significantly impacted central Chile, killing several hundred people and causing severe property damage. The 1922 quake generated a 9-meter local tsunami that inundated the Chile coast near the town of Coquimbo; the tsunami also crossed the Pacific, washing away boats in Hilo harbor, Hawaii. The magnitude 8.8 earthquake of February 27, 2010 ruptured the portion of the South American subduction zone separating these two massive historical earthquakes.

A large vigorous aftershock sequence can be expected from this earthquake.