3.5-Magnitude Quake Strikes Santa Rosa—Shallow Depth on Rodgers Creek Fault Explains Wide Shaking
At 10:33 a.m. on September 3, seismic instruments recorded a magnitude 3.5 earthquake near Larkfield-Wikiup, close to Santa Rosa in Sonoma County. The quake occurred about 7.4 kilometers underground—roughly 4.6 miles deep.