Strong Quakes, Chile

Three strong off-shore earthquakes have struck southern Chile in the past day.

Saturday 12th February 2011

Three magnitude six earthquakes have struck southern Chile during the past day. The first event, a magnitude 6.8 earthquake struck 45 km north of Concepcion, Biobio, Chile at 9:06 p.m. New Zealand Daylight Time last night.

The Pacific Tsunami Warning Centre recorded this event as magnitude 7.0 at a depth of 33 km. In a bulletin issued at 9:14 p.m. NZDT, it advised that a widespread tsunami threat did not exist for the Pacific.

Geoscience Australia also reported the quake as magnitude 7.0 at a depth of 33 km, but determined that it was unlikely to have generated a tsunami. It estimates that the earthquake would have caused damage within 100 km of the epicentre and would have been felt up to 1200 km away.

Geoscience Australia reports that a magnitude 6.1 earthquake struck nearby at a depth of 33 km at 12:39 this afternoon. The U.S. Geological Survey reports this event as magnitude 5.9 at a depth of 19 km. This event was centred off-shore 60 km south-west of Concepcion.

Another quake of sixth magnitude has followed this afternoon. The U.S. Geological Survey reports that a magnitude 6.1 earthquake struck 15 km south of Concepcion at a depth of 15 km at 2:17 this afternoon New Zealand time.

Geoscience Australia reports this latest event as magnitude 6.2 at a depth of 33 km. Its analysis reports that the quake would have caused damage within 45 km of the epicenter and would have been felt up to 560 km away.

The Pacific Tsunami Warning Centre did not issue bulletins for the later events.

[Compiled from data supplied by the U.S. Geological Survey, Geoscience Australia and the Pacific Tsunami Warning Centre.]

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