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San Ramon Quake Swarm Flares Up, Rattles Oakland With New Jolts

Experts say the activity fits a recurring San Ramon swarm on the Calaveras Fault with only a short-term, modest rise in risk.

Magnitude 4.1 Quake Rattles The Geysers Area in Northern California

Calaveras Fault Swarm Rattles East Bay as Dozens of Small Quakes Follow M3.8 Near San Ramon

Offshore Oregon 5.8 Quake Triggers Aftershocks as Officials Report No Tsunami or Damage

Northern California’s Geysers Geothermal Field Shaken by Over 130 Quakes

San Bernardino County Rattled by Fresh 3.5-Magnitude Quake in Ongoing Tremor Swarm