Mission Areas

Natural Hazards

Mission Areas L2 Landing Page Tabs

Filter Total Items: 4,335
Year Published: 2006

Tsunami: wave of change

No abstract available.

Gesit, Eric L.; Titov, Vasily V.; Synolakis, Costas E.
Tsunami: wave of change; 2006; Article; Journal; Scientific American; Gesit, Eric L.; Titov, Vasily V.; Synolakis, Costas E.

Year Published: 2006

Revisiting Frazier's subdeltas: enhancing datasets with dimensionality, better to understand geologic systems

Scientific knowledge from the past century is commonly represented by two-dimensional figures and graphs, as presented in manuscripts and maps. Using today's computer technology, this information can be extracted and projected into three- and four-dimensional perspectives. Computer models can be applied to datasets to provide additional insight...

Flocks, James
Revisiting Frazier's subdeltas: enhancing datasets with dimensionality, better to understand geologic systems; 2006; Article; Journal; Gulf Coast Association of Geological Societies Transactions; Flocks, James

Year Published: 2006

Integration of coral reef ecosystem process studies and remote sensing: Chapter 5

Worldwide, local-scale anthropogenic stress combined with global climate change is driving shifts in the state of reef benthic communities from coral-rich to micro- or macroalgal-dominated (Knowlton, 1992; Done, 1999). Such phase shifts in reef benthic communities may be either abrupt or gradual, and case studies from diverse ocean basins...

Brook, John; Yates, Kimberly; Halley, Robert
Integration of coral reef ecosystem process studies and remote sensing: Chapter 5; 2006; Book chapter; Book; Remote sensing of aquatic coastal ecosystem processes: remote sensing and digital image processing; Brook, John; Yates, Kimberly; Halley, Robert

Year Published: 2006

Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana

The timing, magnitude, and rate of wetland loss were described for five wetland-loss hotspots in the Terrebonne Basin of the Mississippi River delta plain. Land and water areas were mapped for 34 dates between 1956 and 2004 from historical National Wetlands Inventory (NWI) datasets, aerial photographs, and Landsat Thematic Mapper (TM) satellite...

Bernier, Julie C.; Morton, Robert A.; Barras, John A.
Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana; 2006; Article; Conference publication; Coastal environment and water quality: proceedings of the AIH 25th Anniversary Meeting & International Conference "Challenges in Coastal Hyrology and Water Quality"; Bernier, Julie C.; Morton, Robert A.; Barras, John A.

Year Published: 2006

Possible deep-water gas hydrate accumulations in the Bering Sea

Seismic reflection images from the deep-water Aleutian and Bowers Basins of the Bering Sea contain many hundreds of acoustic Velocity-AMPlitude (VAMP) anomalies, each of which may represent a large accumulation of natural gas hydrate. Against a backdrop of essentially horizontal sedimentary reflections, the VAMP anomalies stand out as both...

Barth, Ginger A.; Scholl, David W.; Childs, Jonathan R.
Possible deep-water gas hydrate accumulations in the Bering Sea; 2006; Article; Journal; Fire in the Ice; Barth, Ginger A.; Scholl, David W.; Childs, Jonathan R.

Year Published: 2006

A plastic flow model for the Acquara - Vadoncello landslide in Senerchia, Southern Italy

A previously developed model for stress and velocity fields in two-dimensional Coulomb plastic materials under self-weight and pore pressure predicts that long, shallow landslides develop slip surfaces that manifest themselves as normal faults and normal fault scarps at the surface in areas of extending flow and as thrust faults and thrust fault...

Savage, W.; Wasowski, J.
A plastic flow model for the Acquara - Vadoncello landslide in Senerchia, Southern Italy; 2006; Article; Journal; Engineering Geology; Savage, W.; Wasowski, J.

Year Published: 2006

Abrupt transitions during sustained explosive eruptions: Examples from the 1912 eruption of Novarupta, Alaska

Plinian/ignimbrite activity stopped briefly and abruptly 16 and 45 h after commencement of the 1912 Novarupta eruption defining three episodes of explosive volcanism before finally giving way after 60 h to effusion of lava domes. We focus here on the processes leading to the termination of the second and third of these three episodes. Early...

Adams, N.K.; Houghton, Bruce F.; Hildreth, W.
Abrupt transitions during sustained explosive eruptions: Examples from the 1912 eruption of Novarupta, Alaska; 2006; Article; Journal; Bulletin of Volcanology; Adams, N. K.; Houghton, B. F.; Hildreth, W.

Year Published: 2006

Acoustic stratigraphy of Bear Lake, Utah-Idaho: late Quaternary sedimentation patterns in a simple half-graben

A 277-km network of high-resolution seismic-reflection profiles, supplemented with a sidescan-sonar mosaic of the lake floor, was collected in Bear Lake, Utah–Idaho, in order to explore the sedimentary framework of the lake's paleoclimate record. The acoustic stratigraphy is tied to a 120 m deep, continuously cored drill hole in the lake. Based on...

Colman, Steven M.
Acoustic stratigraphy of Bear Lake, Utah-Idaho: late Quaternary sedimentation patterns in a simple half-graben; 2006; Article; Journal; Sedimentary Geology; Colman, Steven M.

Year Published: 2006

Age model for a continuous, ca 250-ka Quaternary lacustrine record from Bear Lake, Utah-Idaho

The Quaternary sediments sampled by continuous 120-m-long drill cores from Bear Lake (Utah-Idaho) comprise one of the longest lacustrine sequences recovered from an extant lake. The cores serve as a good case study for the construction of an age model for sequences that extend beyond the range of radiocarbon dating. From a variety of potential age...

Colman, Steven M.; Kaufman, D.S.; Bright, Jordon; Heil, C.; King, J.W.; Dean, W.E.; Rosenbaum, J.G.; Forester, R.M.; Bischoff, J.L.; Perkins, Marie; McGeehin, J.P.
Age model for a continuous, ca 250-ka Quaternary lacustrine record from Bear Lake, Utah-Idaho; 2006; Article; Journal; Quaternary Science Reviews; Colman, S. M.; Kaufman, D. S.; Bright, J.; Heil, C.; King, J. W.; Dean, W. E.; Rosenbaum, J. G.; Forester, R. M.; Bischoff, J. L.; Perkins, M.; McGeehin, J. P.

Year Published: 2006

Airborne lidar sensing of massive stony coral colonies on patch reefs in the northern Florida reef tract

In this study we examined the ability of the NASA Experimental Advanced Airborne Research Lidar (EAARL) to discriminate cluster zones of massive stony coral colonies on northern Florida reef tract (NFRT) patch reefs based on their topographic complexity (rugosity). Spatially dense EAARL laser submarine topographic soundings acquired in August 2002...

Brock, J.C.; Wright, C.W.; Kuffner, I.B.; Hernandez, R.; Thompson, P.
Airborne lidar sensing of massive stony coral colonies on patch reefs in the northern Florida reef tract; 2006; Article; Journal; Remote Sensing of Environment; Brock, John C.; Wright, C. Wayne; Kuffner, Ilsa B.; Hernandez, Raquel; Thompson, Philip

Year Published: 2006

Airborne microorganisms in the African desert dust corridor over the mid-Atlantic ridge, Ocean Drilling Program, Leg 209

The objective of this study was to enhance our understanding of the fate and trans-Atlantic transport of dustborne microorganisms from Northern Africa to the Caribbean and Americas, and more specifically to determine if culturable populations could be detected at a mid-ocean site, closer to the source of dust relative to land-based Caribbean sites...

Griffin, Dale W.; Westphal, Douglas L.; Gray, Michael A.
Airborne microorganisms in the African desert dust corridor over the mid-Atlantic ridge, Ocean Drilling Program, Leg 209; 2006; Article; Journal; Aerobiologia; Griffin, D. W.; Westphal, D. L.; Gray, M. A.

Year Published: 2006

Airport geomagnetic surveys in the United States

The Federal Aviation Administration (FAA) and the United States military have requirements for design, location, and construction of compass calibration pads (compass roses), these having been developed through collaboration with US Geological Survey (USGS) personnel. These requirements are detailed in the FAA Advisory Circular AC 150/5300-13,...

Berarducci, A.
Airport geomagnetic surveys in the United States; 2006; Article; Journal; NATO Security through Science Series C: Environmental Security; Berarducci, A.

Filter Total Items: 2,547

Lidar point cloud with and without image overlay

On left, an example of a lidar image created from the “point cloud” that shows objects’ reflectivity near the Santa Cruz Beach Boardwalk and the mouth of the San Lorenzo River. On right, a digital still image overlaid onto the lidar “point cloud” data gives it a realistic 3D look.

Image: Grand Forks Flooding

Grand Forks Flooding

2009 Red River flooding in Grand Forks, North Dakota

USGS
November 6, 2018

Incidental Harassment Authorization

Incidental Harassment Authorization (IHA) issued to the U.S. Geological Survey

Cleary day view of MO cam

[MOcam] Mokuʻāweoweo Caldera from South Rim

This image is from a research camera positioned on the south rim of Mokuʻāweoweo, Mauna Loa's summit caldera, in Hawaiʻi Volcanoes National Park. The camera looks north-northwest, focusing on the southern part of the caldera. The 1940 cone is just right of center; the 1949 cone is on the caldera rim at left. The high point of Mauna Loa's summit is in the background.

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USGS
August 3, 2018

Geomagnetic Observatory Locations

Explore all of the USGS Geomagnetic Observatories with this Google EarthTM download

Image: Floodwater at Wild Rice River

Floodwater at Wild Rice River

Acoustic doppler used to record measurements on Wild Rice River during 2010 flood. Photo taken from bridge at 174th Ave and 124th St southwest of Horace, ND.

Attribution: Natural Hazards
View from a building top of a sandy beach lined with vegetation and some buildings.

Isla Verde Video Camera 1 Snapshot

Snapshot from a video camera at Isla Verde in San Juan, Puerto Rico, looking eastward. Every half hour during daylight hours, the camera shoots video for 10 minutes. This snapshot is the first frame in the 10-minute sequence.

Click for timestamp of latest photo shown here

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Image: Halema'uma'u Crater, Kilauea Volcano Summit Eruption 2008-2013

Halema'uma'u Crater, Kilauea Volcano Summit Eruption 2008-2013

Kīlauea Volcano's summit vent "then and now."  In April 2008 (top image), a month after it opened, the vent within Halema‘uma‘u Crater was about 115 feet in diameter.  As of March 2013 (bottom image), it is more than 500 feet across.  

Attribution: Natural Hazards
View from up high above a flat beach with little sand, lots of stones and rocks, and boulders, very little wave action.

Whidbey Island Video Camera 2 Snapshot

Image from video camera overlooking the coast along a beach on Whidbey Island, WA. Every half hour during daylight hours, the camera shoots video for 10 minutes. This snapshot is the first frame in the 10-minute sequence.

Click for timestamp of latest photo shown here.