Images

Absolutes building at Sitka magnetic observatory Alaska.

An HVO scientist and volunteer work to upgrade the power system of a seismic station located in the Ka‘ū desert on Kīlauea's southwest rift zone. USGS Photo.

Gas sampling from a fumarole on the rim of Halema‘uma‘u Crater within Kīlauea caldera, Hawai‘i.

An HVO geologist uses GPS to map and track the progress of an ‘A‘ā lava flow in Royal Gardens subdivision in 2008. USGS photo.

An HVO scientist collects gravity data from a site on the rim of Kīlauea caldera. The active summit vent in Halema‘uma‘u Crater is visible in the background. USGS photo.

Estimated coastal inundation (blue shading) at Mission Bay in San Diego, California, using the Coastal Storm Modeling System (CoSMoS) developed for ARkStorm. (From USGS Open-File Report 2010-1312.) 

Map of Kīlauea Volcano showing the south-southeast motion, as recorded by continuous GPS sites (arrows), and earthquake epicenter between February 1-3, 2010.

Location of earthquakes as a function of depth and size in the northeastern Caribbean.

Comparison of observed near-bed velocities and modeled near-bed velocities using several bottom-roughness formulations. Velocity vectors are overlaid on map of backscatter from the sea floor showing regions with coarse sand (light color) and fine sand (dark colors). White lines are bathymetry contours.

Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)

The Instrumented Pressure Testing Chamber (IPTC). A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions

Shaded relief image of Northern Cape Cod Bay, MA

Map of the island of Hispaniola that include the countries of Haiti and the Dominican Republic. Fault traces are shown as lines with the following descriptions: barbed=thrust fault; solid=strike-slip fault with arrows showing relative direction of motion; black and white=normal fault.

Sea Level Rise, Subsidence, and Wetland Loss. This video describes causes of wetland loss in the Mississippi River Delta. Rapid land subsidence due to sediment compaction and dewatering increases the rate of submergence in this deltaic system.

Water molecules (1 red oxygen and 2 white hydrogens) form a pentagonal dodecahedron around a methane molecule (1 gray carbon and 4 green hydrogens). This represents 2 of the 8 parts of the typical Structure I gas hydrate molecule.

Volcanic monitoring types and methods employed by the USGS Volcano Hazards Program.

Mount Baker's northeastern face, Washington.

HVO geologist describes activity from Kīlauea Volcano during a field trip to the coastal lava flow field for members of the media in 2010.

Map of the Northeastern Caribbean: topography is in shades of green and bathymetry in shades of blue. Fault traces are shown as lines with the following descriptions: barbed=thrust fault; solid=strike-slip fault with arrows showing relative direction of motion; black and white=normal fault. Faults outlined in red have a potential to generate a large earthquake.

Sediment berm placement in the shoreface of northern Chandeleur Islands, Louisiana

Seismicity is shown for January 17, 2010 through the Feb 8, 2010. Borehole seismometer B207 is located about 7 miles (12 km) northeast of the 2010 swarm. Seismic data are provided by the National Science Foundation funded Plate Boundary Observatory operated by UNAVCO.