Strong earthquake shakes central Chile  — A strong,
magnitude-6.7 earthquake rocked central Chile late Monday,
prompting authorities to order a preventative evacuation of a
stretch of coastline, causing hundreds of people to flee
buildings in panic and shaking up the visiting prime minister of
Canada.   The U.S. Geological Survey initially put the quake's
magnitude at 6.5 but later raised it to 6.7. Its epicenter was
26 miles (42 kilometers) northeast of Valparaiso, and it had a
depth of 23 miles (37 kilometers). It struck just minutes before
midnight local time Monday (3:50 Tuesday GMT).  The Chilean
navy's hydrographic and oceanographic service discounted the
possibility of a tsunami, but authorities maintained an order
for people to move to higher ground along a roughly 500-mile
(roughly 780 kms) stretch of coastline running from the city of
Constitucion to Tongoy, north of the capital.      Visiting
Canadian Prime Minister Stephen Harper was awakened by the
earthquake, but was not hurt.  "The prime minist