8.3 Earthquake hits off the coast Chile

SANTIAGO, Chile (AP) –  A powerful magnitude-8.3 earthquake shook Chile’s capital Wednesday night, causing buildings to sway and people to take refuge in the streets. Several strong aftershocks hit within minutes as tsunami alarms sounded in the nearby port of Valparaiso.

There were no immediate reports on any injuries or damage, but communications were disrupted.

Chilean authorities issued a tsunami alert for the country’s entire coast, and U.S. officials posted an alert for Hawaii. Chile’s emergency office warned that big waves caused by the quake could hit the coast by 11 p.m.

The U.S. Geological Survey initially reported the quake at a preliminary magnitude of 7.9 but quickly revised the reading upward to 8.3. U.S. officials said the quake struck just offshore in the Pacific at 7:54 p.m. (6:54 p.m. EDT, 1154 GMT) and was centered about 141 miles (228 kilometers) north-northwest of Santiago. It said the quake was 4.8 miles (5 kilometers) below the surface.

A magnitude-8.8 quake and ensuing tsunami in central Chile in 2010 killed more than 500 people, destroyed 220,000 homes, and washed away docks, riverfronts and seaside resorts. That quake released so much energy, it actually it shortened the Earth’s day by a fraction of a second by changing the planet’s rotation.

Chile is one of the world’s most earthquake-prone countries because just off the coast, the Nazca tectonic plate plunges beneath the South American plate, pushing the towering Andes cordillera to ever-higher altitudes.

The strongest earthquake ever recorded on Earth happened in Chile — a magnitude-9.5 tremor in 1960 that killed more than

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The USGS just revised the magnitude to an 8.3

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A powerful earthquake has shaken Chile’s capital, causing buildings to sway and people to take refuge in the streets.

The U.S. Geological Survey reports the quake had a preliminary magnitude of 9.9. Chilean authorities recorded it as 7.2.

U.S. officials say the quake was centered ab out 153 miles (246 kilometers) north-northwest of Santiago

KRON 4’S Earthquake page

From USGS:

PRELIMINARY EARTHQUAKE PARAMETERS

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* MAGNITUDE      7.9

* ORIGIN TIME    2255 UTC SEP 16 2015

* COORDINATES    31.5 SOUTH  71.9 WEST

* DEPTH          33 KM / 20 MILES

* LOCATION       NEAR THE COAST OF CENTRAL CHILE

 

 

EVALUATION

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* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.9 OCCURRED

NEAR THE COAST OF CENTRAL CHILE AT 2255 UTC ON WEDNESDAY

SEPTEMBER 16 2015.

 

* BASED ON THE PRELIMINARY EARTHQUAKE PARAMETERS… WIDESPREAD

HAZARDOUS TSUNAMI WAVES ARE POSSIBLE.

 

TSUNAMI THREAT FORECAST

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* HAZARDOUS TSUNAMI WAVES FROM THIS EARTHQUAKE ARE POSSIBLE

WITHIN THE NEXT THREE HOURS ALONG SOME COASTS OF CHILE AND PERU

 

RECOMMENDED ACTIONS

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* 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.

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