2026-05-27T09:23:57.15Z40.267833709717-124.4833297729521.620000839233manualconfirmedUSGS2.75md1Origin/20260527092818.402077.90117Magnitude/20260527092818.402139.90118USGS18 km WSW of Petrolia, CAregion namenccatalognc75369752contributorID