The quake struck at 7:38 a.m. 3 miles west of Isla Vista. The temblor had a preliminary magnitude of 4.9, but was later downgraded to 4.6. Two 2.6-magnitude aftershocks were reported at 7:50 a.m. and 8:38 a.m.
Santa Barbara County Fire says there were no immediate reports of damage or injuries.
