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Time-series photographs of the sea floor in western Massachusetts Bay: May 1999 to September 1999; May 2000 to September 2000; and October 2001 to February 2002
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 May 1999 to September 1999; May 2000 to September 2000; and October 2001 to February 2002. Site A is approximately 1 km south of an ocean outfall that...Butman, Bradford; Alexander, P. Soupy; Bothner, Michael H.
Book review: Earth’s magnetism in the age of sail
For many centuries, the source, behavior, and even the essential nature of geomagnetism were enigmatic. Despite this, the effect of geomagnetism was familiar, by imparting a directional preference on the magnetized needle of the compass and providing a useful, if somewhat annoyingly complicated, reference for navigators. Although the compass seems...Love, Jeffrey J.
Comments on potential geologic and seismic hazards affecting coastal Ventura County, California
This report examines the regional seismic and geologic hazards that could affect proposed liquefied natural gas (LNG) facilities in coastal Ventura County, California. Faults throughout this area are thought to be capable of producing earthquakes of magnitude 6.5 to 7.5, which could produce surface fault offsets of as much as 15 feet. Many of...Ross, Stephanie L.; Boore, David M.; Fisher, Michael A.; Frankel, Arthur D.; Geist, Eric L.; Hudnut, Kenneth W.; Kayen, Robert E.; Lee, Homa J.; Normark, William R.; Wong, Florence L.
Icelandic analogs to Martian flood lavas
We report on new field observations from Icelandic lava flows that have the same surface morphology as many Martian flood lava flows. The Martian flood lavas are characterized by a platy‐ridged surface morphology whose formation is not well understood. The examples on Mars include some of the most pristine lava on the planet and flows >1500 km...Keszthelyi, Laszlo P.; Thordarson, Thorvaldur; McEwen, Alfred; Haack, Henning; Guilbaud, Marie-Noelle; Self, Stephen; Rossi, Matti J.
RADAR: The Cassini Titan Radar Mapper
The Cassini RADAR instrument is a multimode 13.8 GHz multiple-beam sensor that can operate as a synthetic-aperture radar (SAR) imager, altimeter, scatterometer, and radiometer. The principal objective of the RADAR is to map the surface of Titan. This will be done in the imaging, scatterometer, and radiometer modes. The RADAR altimeter data will...Elachi, C.; Allison, M.D.; Borgarelli, L.; Encrenaz, P.; Im, E.; Janssen, M.A.; Johnson, W.T.K.; Kirk, Randolph L.; Lorenz, R.D.; Lunine, J.I.; Muhleman, D.O.; Ostro, S.J.; Picardi, G.; Posa, F.; Rapley, C.G.; Roth, L.E.; Seu, R.; Soderblom, Laurence A.; Vetrella, S.; Wall, S.D.; Wood, C.A.; Zebker, H.A.
The face of the Moon: Lunar volcanoes and volcanic deposits
No abstract available.Lopes, Rosaly M.C.; Gregg, Tracy K. P.; Gaddis, Lisa R.
Chapter E. The Loma Prieta, California, Earthquake of October 17, 1989 - Geologic Setting and Crustal Structure
Although some scientists considered the Ms=7.1 Loma Prieta, Calif., earthquake of 1989 to be an anticipated event, some aspects of the earthquake were surprising. It occurred 17 km beneath the Santa Cruz Mountains along a left-stepping restraining bend in the San Andreas fault system. Rupture on the southwest-dipping fault plane consisted of...Wells, Ray E.
Coastal vulnerability assessment of Cumberland Island National Seashore (CUIS) 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 Cumberland Island National Seashore in Georgia. The CVI ranks the following in terms of their physical contribution to sea-level rise-related coastal change: geomorphology, regional coastal slope, rate of relative sea-level...Pendleton, Elizabeth A.; Thieler, E. Robert; Jeffress Williams, S.
Earthquakes and faults in the San Francisco Bay area (1970-2003)
The map depicts both active and inactive faults and earthquakes magnitude 1.5 to 7.0 in the greater San Francisco Bay area. Twenty-two earthquakes magnitude 5.0 and greater are indicated on the map and listed chronologically in an accompanying table. The data are compiled from records from 1970-2003. The bathymetry was generated from a digital...Sleeter, Benjamin M.; Calzia, James P.; Walter, Stephen R.; Wong, Florence L.; Saucedo, George J.
Ecosystem history of southern and central Biscayne Bay: summary report on sediment core analyses - year two
The Comprehensive Everglades Restoration Plan (CERP) lists restoration of the timing, quantity, and quality of the natural flow of freshwater as one its primary goals. Before restoration can occur, however, the baseline conditions of the environment prior to significant human alteration must be established and the range of variation within the...Wingard, G. Lynn; Cronin, Thomas M.; Holmes, Charles W.; Willard, Debra A.; Dwyer, Gary S.; Ishman, Scott E.; Orem, William; Williams, Christopher P.; Albietz, Jessica; Bernhardt, Christopher E.; Budet, Carlos A.; Landacre, Bryan; Lerch, Terry; Marot, Marci; Ortiz, Ruth E.
Hazard analysis of landslides triggered by Typhoon Chata'an on July 2, 2002, in Chuuk State, Federated States of Micronesia
More than 250 landslides were triggered across the eastern volcanic islands of Chuuk State in the Federated States of Micronesia by torrential rainfall from tropical storm Chata?an on July 2, 2002. Landslides triggered during nearly 20 inches of rainfall in less than 24 hours caused 43 fatalities and the destruction or damage of 231 structures,...Harp, Edwin L.; Reid, Mark E.; Michael, John A.
Maps showing estimated sediment yield from coastal landslides and active slope distribution along the Big Sur coast, Monterey and San Luis Obispo Counties, California
The 1982-83 and 1997-98 El Ni?os brought very high precipitation to California?s central coast; this precipitation resulted in raised groundwater levels, coastal flooding, and destabilized slopes throughout the region. Large landslides in the coastal mountains of Big Sur in Monterey and San Luis Obispo Counties blocked sections of California State...Hapke, Cheryl J.; Green, Krystal R.; Dallas, Kate
Video cameras overlook the coast along a beach on Whidbey Island, Island County at the northern boundary of Puget Sound in western Washington. Today’s most recent image from camera 1 is shown here. Every half hour during daylight hours, the camera shoots video for 10 minutes. This bright image shows the brightest pixel values throughout the video, useful for identifying...
A USGS student employee and sophomore at the Colorado School of Mines, was among the first hired by USGS using Recovery Act funding to upgrade the seismic stations of the Advanced National Seismic System (ANSS) Backbone. The USGS is using Recovery Act funding to upgrade its earthquake monitoring networks and hire students who represent the future of science and public...
Heavy rains from a tropical cyclone struck the islands of the Comoros in March, 2014. On the island of Anjouan in the Union of Comoros, these rains triggered landslides that displaced over 3000 people to refugee camps. The USGS and the OFDA with USAID are providing support and research assistance on these events. This photo is of Grand Comoros island, taken during a trip...
Fredericksburg Magnetic Observatory and Laboratory Corbin, Virginia.
Two video cameras atop the Dream Inn hotel in Santa Cruz, California overlook the coast in northern Monterey Bay. Camera 2 looks southward over Cowells Beach, shown here. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes. Today’s most recent image from camera 2 is shown below. Please note that it takes 10 minutes for the images...
A crew of USGS Georgia Water Science Center hydrologic technicians had to use "alternate" transportation on Interstate 20 west of Atlanta to measure the epic 2009 Atlanta floods.
This image is from a temporary research camera positioned on the north rim of Puʻu ʻŌʻō, looking into the crater. The current crater is about 250 m (~275 yds) across.
The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather...