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A 3.9 magnitued aftershock rattled the Napa region Tuesday morning. News10/KXTV

NAPA, Calif. (AP) - Napa County has been rattled by a small aftershock to the strong and damaging earthquake that hit California's wine capital over the weekend.

The US Geological Survey says the 3.9-magnitude quake struck at 5:33 a.m. Tuesday about seven miles south of the city of Napa.

PREVIOUS STORY: Napa wary of aftershocks in wake of 6.0 jolt

A sheriff's dispatcher says the station shook a little, but there have been no calls reporting damage or injuries.

California's wine capital is still recovering from Sunday's 6.0-magnitude earthquake, which is estimated to have caused at least $1 billion in property damage.

RELATED: Earthquake rattles, doesn't wreck Napa wineries

There have been a series of small aftershocks, mostly in the 2.0-magnitude range.

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