A magnitude 3.4 earthquake rattled the Devore and northwest Rialto areas this morning near the base of the Cajon Pass but went largely unnoticed, San Bernardino County Fire Department dispatchers say.

"That would put it right here," Dispatch Supervisor Sue Hood said from the department's command center at Rialto Municipal Airport. "We didn't feel a thing. And I got no calls on it at all."

The minor quake struck at 2:11 a.m. three miles south-southwest of Devore and five miles north-northwest of Rialto, according to U.S. Geological Survey seismographs.

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