2021-12-25T05:15:03.0000Z37.4124985-121.8121643-0.59manualconfirmedUSGS1.87md1Origin/20211225051720.914481.554526Magnitude/20211225051720.914532.554527USGS5km NNE of Alum Rock, CAregion namenccatalognc73668431contributorID