SANTIAGO, Chile (CBS SF) — A magnitude 6.6 aftershock struck near the coast of Chile Monday, just days after a massive 8.3 magnitude quake hit the area, but there was no immediate tsunami threat.

The USGS reported the 6.6 magnitude earthquake that struck about 28 miles west southwest of Illapel, Chile around 10:40 a.m. pacific time Monday morning.

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No damage or injuries were immediately reported.

COMPLETE QUAKE COVERAGE: CBS Earthquake Resource Center

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This article will be updated as information warrants, and follow KPIX 5 on Twitter at @CBSSF or KCBS Radio on Twitter at @KCBSNews for updates on breaking news anytime.

DID YOU FEEL IT?: USGS Shake Map For Northern California
LIVE QUAKE MAP: Track Real-Time Hot Spots
BAY AREA FAULTS: Interactive Map Of Local Faults

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Strong earthquakes with an epicenter off the coast can trigger tsunamis, depending on the size and type of the fault movement. The Pacific Tsunami Warning Center tracks earthquake data for the West Coast.
WEST COAST TSUNAMI TRACKING:

Tsunami Alerts & Maps