Series of Earthquakes Shake Northern California, Including 4.2 Magnitude Quake near Isleton

A 4.2-magnitude earthquake struck Sacramento County and parts of the San Francisco Bay Area in Northern California, causing moderate shaking in some areas. The earthquake, initially estimated to be magnitude 5.7, was downgraded. There were no immediate reports of damage or injury. The quake occurred just before the statewide earthquake drill, where millions of Californians will practice safety measures.