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Aftershock hits near spot of Easter quake

An aftershock with a preliminary magnitude of 4.1 rocked eastern San Diego County at 9:09 a.m. Saturday.

The automated California Integrated Seismic Network placed the epicenter

30 miles south-southeast of Calexico, at the same approximate spot as the epicenter of the magnitude 7.2 Easter Sunday earthquake.

Seismologists have said the rash of noticeable aftershocks from the big

quake - more than 4,000 - is normal for a large earthquake.