USGS says the quake struck around 8:09 p.m. with the epicenter recorded at just over a mile east of Fullerton.
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People near the epicenter reported feeling a single strong jolt, and ABC7 received reports of shaking from viewers in Anaheim at Disneyland as well as Tustin.
No damage or injuries were immediately reported and there have been no reports of any additional aftershocks.
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