2014 South Napa CA M6 Earthquake - August 24
Damaged unreinforced masonry building on Main St. in Napa Downtown.
View Article2014 South Napa CA M6 Earthquake - August 24
Driveway buckling across secondary fault strand at Browns Valley Rd.
View Article2014 South Napa CA M6 Earthquake - August 24
Right lateral offset of Browns Valley Rd. centerline, on a secondary fault strand.
View Article2014 South Napa CA M6 Earthquake - August 24
Pavement buckling and tented sidewalk resulting from ~14 cm of compression on Sandybrook Ln., north end of main rupture.
View Article2014 South Napa CA M6 Earthquake - August 24
Right-lateral offset of vineyard row of nearly 40 cm. Photo taken on the main fault rupture near Buhman Rd.
View Article2014 South Napa CA M6 Earthquake - August 24
Right-lateral displacement of centerline on Redwood Rd of 2.4 cm along a secondary rupture strand, near the north end of the fault rupture.
View Article2014 South Napa CA M6 Earthquake - August 24
Left-stepping en echelon fractures characteristic of right-lateral fault displacement at the ground surface. Total fault slip measured near this location was 40-46 cm. Photo taken on main rupture...
View Article2014 South Napa CA M6 Earthquake - August 24
Small displacement ground cracks along main rupture near Cuttings Wharf Rd., south of Hwy. 12, taken the day of the earthquake. Displacement in this area grew to ~20 cm right-lateral by Monday, 8/25,...
View Article2014 South Napa CA M6 Earthquake - August 24
Continuous "mole-track" running parallel to the strike of the fault indicates some E-W compression in addition to right-lateral faulting. Photo taken near Buhman Rd.
View ArticleRock Riffle and Water Flow in Sonoma Creek
Increased flow over rock riffle in Sonoma Creek seen after South Napa Earthquake of August 24, 2014. Location: Sonoma Creek downstream of the Agua Caliente Road Bridge, Sonoma County, California.
View ArticleUSGS Geologists Inspecting Fault Trace in a Trench
View of geologists pointing to fault in a trench dug across one of the ruptures from the 2014 South Napa earthquake. From front to rear: Alexandra Pickering, Suzanne Hecker, Aaron Page (all USGS)....
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