Publications
Filter Total Items: 7511
Size distribution of submarine landslides along the U.S. Atlantic margin Size distribution of submarine landslides along the U.S. Atlantic margin
Assessment of the probability for destructive landslide-generated tsunamis depends on the knowledge of the number, size, and frequency of large submarine landslides. This paper investigates the size distribution of submarine landslides along the U.S. Atlantic continental slope and rise using the size of the landslide source regions (landslide failure scars). Landslide scars along the...
Authors
J.D. Chaytor, Uri S. ten Brink, A.R. Solow, B.D. Andrews
Microseismicity at the North Anatolian Fault in the Sea of Marmara offshore Istanbul, NW Turkey Microseismicity at the North Anatolian Fault in the Sea of Marmara offshore Istanbul, NW Turkey
The North Anatolian Fault Zone (NAFZ) below the Sea of Marmara forms a “seismic gap” where a major earthquake is expected to occur in the near future. This segment of the fault lies between the 1912 Ganos and 1999 İzmit ruptures and is the only NAFZ segment that has not ruptured since 1766. To monitor the microseismic activity at the main fault branch offshore of Istanbul below the...
Authors
Fatih Bulut, Marco Bohnhoff, William L. Ellsworth, Mustafa Aktar, Georg Dresen
Quaternary science reviews Pacific Basin tsunami hazards associated with mass flows in the Aleutian arc of Alaska Quaternary science reviews Pacific Basin tsunami hazards associated with mass flows in the Aleutian arc of Alaska
We analyze mass-flow tsunami generation for selected areas within the Aleutian arc of Alaska using results from numerical simulation of hypothetical but plausible mass-flow sources such as submarine landslides and volcanic debris avalanches. The Aleutian arc consists of a chain of volcanic mountains, volcanic islands, and submarine canyons, surrounded by a low-relief continental shelf...
Authors
Christopher F. Waythomas, Philip Watts, Fengyan Shi, James T. Kirby
Test of a method to calculate near-bank velocity and boundary shear stress Test of a method to calculate near-bank velocity and boundary shear stress
No abstract available.
Authors
Jason W. Kean, Roger A. Kuhnle, J. Dungan Smith, Carlos V. Alonso, Eddy J. Langendoen
Bathymetry and acoustic backscatter: Northern Santa Barbara Channel, Southern California Bathymetry and acoustic backscatter: Northern Santa Barbara Channel, Southern California
In the summer of 2008, as part of the California Seafloor Mapping Program (CSMP) the U.S. Geological Survey, Coastal and Marine Geology mapped a nearshore region of the northern Santa Barbara Channel in Southern California (fig 1). The CSMP is a cooperative partnership between Federal and State agencies, Universities, and Industry to create a comprehensive coastal/marine geologic and...
Authors
Pete Dartnell, David Finlayson, Jamie Conrad, Guy Cochrane, Samuel Johnson
Diverse lavas from closely spaced volcanoes drawing from a common parent: Emmons Lake Volcanic Center, Eastern Aleutian Arc Diverse lavas from closely spaced volcanoes drawing from a common parent: Emmons Lake Volcanic Center, Eastern Aleutian Arc
Emmons Lake Volcanic Center (ELVC) on the lower Alaskan Peninsula is one of the largest and most diverse volcanic centers in the Aleutian Arc. Since the Middle Pleistocene, eruption of ~ 350 km3 of basalt through rhyolite has produced a 30 km, arc front chain of nested calderas and overlapping stratovolcanoes. ELVC has experienced as many as five major caldera-forming eruptions, the most...
Authors
M. Mangan, T. Miller, C. Waythomas, F. Trusdell, A. Calvert, P. Layer
The increasing wildfire and post-fire debris-flow threat in western USA, and implications for consequences of climate change The increasing wildfire and post-fire debris-flow threat in western USA, and implications for consequences of climate change
In southern California and the intermountain west of the USA, debris flows generated from recently-burned basins pose significant hazards. Increases in the frequency and size of wildfires throughout the western USA can be attributed to increases in the number of fire ignitions, fire suppression practices, and climatic influences. Increased urbanization throughout the western USA...
Authors
Susan H. Cannon, Jerry DeGraff
Features of lava lake filling and draining and their implications for eruption dynamics Features of lava lake filling and draining and their implications for eruption dynamics
Lava lakes experience filling, circulation, and often drainage depending upon the style of activity and location of the vent. Features formed by these processes have proved difficult to document due to dangerous conditions during the eruption, inaccessibility, and destruction of features during lake drainage. Kilauea Iki lava lake, Kilauea, Hawai'i, preserves many such features, because...
Authors
W.K. Stovall, Bruce F. Houghton, A.J.L. Harris, D. A. Swanson
SBAS-InSAR analysis of surface deformation at Mauna Loa and Kilauea volcanoes in Hawaii SBAS-InSAR analysis of surface deformation at Mauna Loa and Kilauea volcanoes in Hawaii
We investigate the deformation of Mauna Loa and Kllauea volcanoes, Hawai'i, by exploiting the advanced differential Synthetic Aperture Radar Interferometry (InSAR) technique referred to as the Small BAseline Subset (SBAS) algorithm. In particular, we present time series of line-of-sight (LOS) displacements derived from SAR data acquired by the ASAR instrument, on board the ENVISAT...
Authors
F. Casu, Riccardo Lanari, E. Sansosti, G. Solaro, Pietro Tizzani, Michael Poland, Asta Mikijus
Developing framework to constrain the geometry of the seismic rupture plane on subduction interfaces a priori - A probabilistic approach Developing framework to constrain the geometry of the seismic rupture plane on subduction interfaces a priori - A probabilistic approach
A key step in many earthquake source inversions requires knowledge of the geometry of the fault surface on which the earthquake occurred. Our knowledge of this surface is often uncertain, however, and as a result fault geometry misinterpretation can map into significant error in the final temporal and spatial slip patterns of these inversions. Relying solely on an initial hypocentre and...
Authors
G.P. Hayes, D.J. Wald
Geomagnetic observations on tristan da cunha, south atlantic ocean Geomagnetic observations on tristan da cunha, south atlantic ocean
Few geomagnetic ground observations exist of the Earth's strongest core field anomaly, the South Atlantic Anomaly (SAA). The geomagnetic repeat station on the island Tristan da Cunha, located half-way between South Africa and South America at 37?? 05' S, 12?? 18' W, is therefore of crucial importance. We have conducted several sets of repeat station measurements during magnetically quiet
Authors
J. Matzka, N. Olsen, C.F. Maule, L.W. Pedersen, A.M. Berarducci, S. Macmillan
Diffusion-equation representations of landform evolution in the simplest circumstances: Appendix C Diffusion-equation representations of landform evolution in the simplest circumstances: Appendix C
The diffusion equation is one of the three great partial differential equations of classical physics. It describes the flow or diffusion of heat in the presence of temperature gradients, fluid flow in porous media in the presence of pressure gradients, and the diffusion of molecules in the presence of chemical gradients. [The other two equations are the wave equation, which describes the
Authors
Thomas C. Hanks