https://baytremor.com/earthquake/nc75355057 Bay Tremor en 2026-05-01T15:23:48.030Z earthquake, Bay Area earthquake, California earthquake, 10 km SSW of Brentwood, CA, San Ramon / Dublin / Pleasanton, Contra Costa / Alameda County, Calaveras Fault, M1.8 earthquake, seismic activity, earthquake today California, USA 2026-05-01T15:23:48.030Z hourly 0.9 https://baytremor.com/earthquake/nc75355052 Bay Tremor en 2026-05-01T15:16:53.170Z earthquake, Bay Area earthquake, California earthquake, 2 km S of Ridgemark, CA, M1.3 earthquake, seismic activity, earthquake today California, USA 2026-05-01T15:16:53.170Z hourly 0.9