USGS announces awards for 2018 earthquake monitoring and research
The U.S Geological Survey announces that the agency has awarded more than $20 million in 2018 for earthquake monitoring and applied research.Read Story
Better Performance and New Features on Earthquake Website
Better performance and new features: landslides and liquefaction estimates, population map layer, Spanish Did You Feel It?, and aftershock forecasts.Read More
Seismic Sensors Record a Hurricane’s Roar
Newly installed infrasound sensors at a Global Seismographic Network station on Puerto Rico recorded the sounds of Hurricane Maria passing overhead.Read Story
Mission Areas L2 Landing Page Tabs
Coastal vulnerability assessment of Assateague Island National Seashore (ASIS) to sea-level rise
A coastal vulnerability index (CVI, http://pubs.usgs.gov/of/2004/1020/html/cvi.htm) was used to map relative vulnerability of the coast to future sea-level rise within Assateague Island National Seashore (ASIS) in Maryland and Virginia. The CVI ranks the following in terms of their physical contribution to sea-level rise-related coastal change:...Pendleton, Elizabeth A.; Williams, S. Jeffress; Thieler, E. Robert
Coastal vulnerability assessment of Olympic National Park to sea-level rise
A coastal vulnerability index (CVI) was used to map the relative vulnerability of the coast to future sea-level rise within Olympic National Park (OLYM), Washington. The CVI scores the following in terms of their physical contribution to sea-level rise-related coastal change: geomorphology, regional coastal slope, rate of relative sea-level rise,...Pendleton, Elizabeth A.; Hammar-Klose, Erika S.; Thieler, E. Robert; Williams, S. Jeffress
Depth to the Juan De Fuca slab beneath the Cascadia subduction margin - a 3-D model for sorting earthquakes
We present an updated model of the Juan de Fuca slab beneath southern British Columbia, Washington, Oregon, and northern California, and use this model to separate earthquakes occurring above and below the slab surface. The model is based on depth contours previously published by Fluck and others (1997). Our model attempts to rectify a number of...McCrory, Patricia A.; Blair, J. Luke; Oppenheimer, David H.; Walter, Stephen R.
Time-series photographs of the sea floor in western Massachusetts Bay: June 1997 to June 1998
This report presents time-series photographs of the sea floor obtained from an instrumented tripod deployed at Site A in western Massachusetts Bay (42° 22.6' N., 70? 47.0' W., 30 m water depth, from June 1997 through June 1998. Site A is approximately 1 km south of an ocean outfall that began discharging treated sewage effluent from the Boston...Butman, Bradford; Alexander, P. Soupy; Bothner, Michael H.
Causes of coral reef degradation
No abstract available.Aronson, R.B.; Bruno, J.F.; Precht, W.F.; Glynn, P.W.; Harvell, C.D.; Kaufman, L.; Rogers, C.S.; Shinn, E.A.; Valentine, J.F.; Pandolfi, J.M.; Bradbury, R.H.; Sala, E.; Hughes, T.P.; Bjorndal, K.A.; Cooke, R.G.; McArdle, D.; McClenachan, L.; Newman, M.J.H.; Paredes, G.; Warner, R.R.; Jackson, J.B.C.; Baird, A.H.; Bellwood, D.R.; Connolly, S.R.; Folke, C.; Grosberg, R.; Hoegh-Guldberg, O.; Kleypas, J.; Lough, J.M.; Marshall, P.; Nystram, M.; Palumbi, S.R.; Rosen, B.; Roughgarden, J.
Natural weathering rates of silicate minerals
No abstract available.Drever, J.I.; White, A.F.
Preliminary geologic map of Great Sitkin Volcano, AlaskaWaythomas, Christopher F.; Miller, Thomas P.; Nye, Christopher
Earthquake recordings from the 2002 Seattle Seismic Hazard Investigation of Puget Sound (SHIPS), Washington State
This report describes seismic data obtained during the fourth Seismic Hazard Investigation of Puget Sound (SHIPS) experiment, termed Seattle SHIPS . The experiment was designed to study the influence of the Seattle sedimentary basin on ground shaking during earthquakes. To accomplish this, we deployed seismometers over the basin to record local...Pratt, Thomas L.; Meagher, Karen L.; Brocher, Thomas M.; Yelin, Thomas; Norris, Robert; Hultgrien, Lynn; Barnett, Elizabeth; Weaver, Craig S.
Preliminary geologic map of Kanaga Volcano, Alaska
Kanaga Volcano is a 1,300 m (4,287-foot) high, historically active cone-shaped stratovolcano located on the north end of Kanaga Island in the Andreanof Islands Group of the Aleutian Islands. The volcano is undissected, symmetrical in profile, and is characterized by blocky andesitic lava flows, with well-developed levees and steep flow fronts,...Miller, T.P.; Waythomas, C.F.; Nye, C.J.
Preliminary volcano-hazard assessment for Great Sitkin Volcano, Alaska
Great Sitkin Volcano is a composite andesitic stratovolcano on Great Sitkin Island (51°05’ N latitude, 176°25’ W longitude), a small (14 x 16 km), circular volcanic island in the western Aleutian Islands of Alaska. Great Sitkin Island is located about 35 kilometers northeast of the community of Adak on Adak Island and 130 kilometers west of the...Waythomas, Christopher F.; Miller, Thomas P.; Nye, Christopher J.
Subsurface evidence of a pre-1846 breach across Menauhant Barrier, Cape Cod, Massachusetts
No abstract available.Buynevich, Ilya V.
Location and age database for selected foraminifer samples collected by Exxon Petroleum geologists in California
Most of the geologic maps published for central California before 1960 were made without the benefit of age determinations from microfossils. The ages of Cretaceous and Tertiary rocks in the mostly poorly exposed and structurally complex sedimentary rocks represented in the Coast Ranges are critical in determining stratigraphic succession or lack...Brabb, Earl E.; Parker, John M.
A magnitude 4.8 earthquake struck the island of Anjouan in the Union of the Comoros on March 12, 2014. Heavy rainfall trigger landslides and damages were incurred to buildings, roads, and water supplies. As a precaution, more than 3,000 citizens living below the landslides were moved to a refugee camp. The USGS and the OFDA with USAID are providing support and research...
ARRA-funded student Taryn Lopez (Univ. Alaska-Fairbanks) sampling gas emissions at fumarole next to dome at the summit of Augustine volcano.
This image is from a research camera positioned in the observation tower at the Hawaiian Volcano Observatory. The camera looks northwest toward the summit and Northeast Rift Zone of Mauna Loa.
The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal...
Provisional Mapping Data of the Mud Creek Landslide from UAS-based SfM Photogrammetry
by Jonathan Warrick, Josh Logan, Andy Ritchie