Images

Surface rupture across State Highway 12 at Cuttings Wharf Road - Photo taken by USGS from California Highway Patrol helicopter on August 24, 2014

Timeline of past drilling activities conducted by countries, private sector firms, government agencies, and academe that have helped to refine global gas hydrate estimates and possible future drilling and production testing

Damage to a building in downtown Napa, CA caused by the South Napa earthquake. Photo taken by USGS from California Highway Patrol helicopter on August 24, 2014

USGS volunteer Whitney DeLong and geology intern Alexandra Pickering collecting topographic data with a three-dimensional laser scanner along Cuttings Wharf Road in Napa County, CA on August 26, 2014. In the background are engineers inspecting the earthquake surface rupture where is passes through a horse paddock.

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.

Right-lateral offset of vineyard row of nearly 40 cm. Photo taken on the main fault rupture near Buhman Rd.

Pavement buckling and tented sidewalk resulting from ~14 cm of compression on Sandybrook Ln., north end of main rupture.

Damaged unreinforced masonry building on Main St. in Napa Downtown.

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, due to afterslip.

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 strand near Buhman Rd.

Right lateral offset of Browns Valley Rd. centerline, on a secondary fault strand.

Driveway buckling across secondary fault strand at Browns Valley Rd. 

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.

Map showing the June 27th flow in Kīlauea's East Rift Zone as of August 22, 2014. The area of the flow as mapped on August 12 is shown in pink, while widening and advancement of the flow as of August 22 is shown in red. The heavy brown line marks the extent of steaming along a ground crack into which lava is flowing.

A closer look at the lava stream plunging into the crack. The lava is fed from the vent on Pu‘u ‘Ō‘ō via a lava tube.

North of where lava is entering the crack, another lobe is pushing through thick forest, triggering small brush fires. The source of the smoke marks the front of this lobe, and Pu‘u ‘Ō‘ō can be seen just above this spot.

Looking west, this photo shows the far end of the steaming that extends out beyond the visible flow margin at the surface.

A closer look at one of the steam sources. The crack from which steam is issuing is not visible through the thick vegetation.

A view looking east, near the front of the southern lobe that has entered the crack. Lava is inferred to be present in the deep crack beyond the visible margin of the flow, based on the line of steam sources as well as a vigorous cascade of lava seen in a skylight in the bottom portion of the photo.

Pu‘u ‘Ō‘ō crater remains partly obscured by thick fume. The thermal camera today revealed that several lava ponds persist in their usual locations in the northeast and southeast portions of the crater floor.

Lava from June 27 breakout flowing into deep ground crack along Kīlauea's East Rift Zone, Pu‘u ‘Ō‘ō, Hawai‘i.