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Filter Total Items: 4,536
Year Published: 2016

Building damage survey and microtremor measurements for the source region of the 2015 Gorkha, Nepal, earthquake

We performed a damage survey of buildings and carried out microtremor observations in the source region of the 2015 Gorkha earthquake. Our survey area spans the Kathmandu valley and areas to the east and north of the valley. Damage of buildings in the Kathmandu valley was localized, and the percentage of the totally collapsed buildings was less...

Yamada, Masumi; Hayashida, Takumi; Mori, James; Mooney, Walter
Yamada, Masumi, Hayashida, Takumi, Mori, Jim, and Mooney, Walter D., 2016, Building damage survey and microtremor measurements for the source region of the 2015 Gorkha, Nepal, earthquake: Earth, Planets and Space, 68:117, https://doi.org/10.1186/s40623-016-0483-4.

Year Published: 2016

Changes in blast zone albedo patterns around new martian impact craters

“Blast zones” (BZs) around new martian craters comprise various albedo features caused by the initial impact, including diffuse halos, extended linear and arcuate rays, secondary craters, ejecta patterns, and dust avalanches. We examined these features for changes in repeat images separated by up to four Mars years. Here we present the first...

Daubar, Ingrid J.; Dundas, Colin M.; Byrne, Shane; Geissler, Paul E.; Bart, Gwen; McEwen, Alfred S.; Russell, Patrick; Chojnacki, Matthew; Golombek, M.P.
I.J. Daubar, C.M. Dundas, S. Byrne, P. Geissler, G.D. Bart, A.S. McEwen, P.S. Russell, M. Chojnacki, and M.P. Golombek, 2016, Changes in blast zone albedo patterns around new martian impact craters: Icarus 267 (2016) 86–105, https://doi.org/10.1016/j.icarus.2015.11.032.

Year Published: 2016

Chapter 5: Buildings (EERI Earthquake Reconnaissance Team Report: M7.8 Gorkha, Nepal Earthquake on April 25, 2015 and its Aftershocks)

The most common building typologies in Nepal are reinforced concrete (RC) frame buildings with masonry infill walls, unreinforced masonry (URM) bearing wall buildings, and wood frame buildings (Figure 5-1). The RC frames with masonry infills are commonly constructed in urban and semi-urban areas. Most of these buildings are three to five stories...

Kaushik, Hemant; Bevington, John; Jaiswal, Kishor; Lizundia, Bret; Shrestha, Surya

Year Published: 2016

Orbital monitoring of martian surface changes

A history of martian surface changes is documented by a sequence of global mosaics made up of Mars Global Surveyor Mars Orbiter Camera daily color images from 1999 to 2006, together with a single mosaic from the Mars Reconnaissance Orbiter Mars Color Imager in 2009. These observations show that changes in the global albedo patterns of Mars take...

Geissler, Paul E.; Fenton, L.K.; Enga, M.; Mukherjee, P.
Geissler, P.E., Fenton, L.K., Enga, M., and Mukherjee, P., 2016, Orbital monitoring of martian surface changes: Icarus, v. 278,p. 279-300, https://doi.org/10.1016/j.icarus.2016.05.023.

Year Published: 2016

Seismic‐hazard forecast for 2016 including induced and natural earthquakes in the central and eastern United States

The U.S. Geological Survey (USGS) has produced a one‐year (2016) probabilistic seismic‐hazard assessment for the central and eastern United States (CEUS) that includes contributions from both induced and natural earthquakes that are constructed with probabilistic methods using alternative data and inputs. This hazard assessment builds on our 2016...

Petersen, Mark D.; Mueller, Charles; Moschetti, Morgan P.; Hoover, Susan M.; Llenos, Andrea L.; Ellsworth, William L.; Michael, Andrew J.; Rubinstein, Justin L.; McGarr, Arthur F.; Rukstales, Kenneth S.

Year Published: 2016

Comment on “The reduction of friction in long-runout landslides as an emergent phenomenon” by Brandon C. Johnson et al.

Results from a highly idealized, 2-D computational model indicate that dynamic normal-stress rarefactions might cause friction reduction in long-runout landslides, but the physical relevance of the idealized dynamics has not been confirmed by experimental tests. More importantly, the model results provide no evidence that refutes alternative...

Iverson, Richard M.
Iverson, R.M., 2016, Comment on “The reduction of friction in long-runout landslides as an emergent phenomenon” by Brandon C. Johnson, Charles S. Campbell, and H. Jay Melosh. Journal of Geophysical Research-Earth Surface, 121, 2238–2242, doi:10.1002/2016JF003979

Year Published: 2016

Modelling landslide liquefaction, mobility bifurcation and the dynamics of the 2014 Oso disaster

Some landslides move slowly or intermittently downslope, but others liquefy during the early stages of motion, leading to runaway acceleration and high-speed runout across low-relief terrain. Mechanisms responsible for this disparate behaviour are represented in a two-phase, depth-integrated, landslide dynamics model that melds principles from...

Iverson, Richard M.; George, David L.
Iverson, R.M., and George, D.L., 2016, Modeling landslide liquefaction, mobility bifurcation and the dynamics of the 2014 Oso disaster. Geotechnique, 66, 175–187, doi: 10.1680/jgeot.15.LM.004.

Year Published: 2016

2016 Eastern Section SSA Annual Meeting Report

Report on the Eastern Section Seismological Society of America Meeting.

Pratt, Thomas L.; Goulet, Christine A.; Boyd, Oliver S.
Pratt, T., Goulet, C., and Boyd, O., 2016, 2016 Eastern Section SSA Annual Meeting Report, Seismological Research Letters, v. 88, p. 224-262. DOI: 10.1785/0220160205

Year Published: 2016

Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale crater, Mars

This study provides the first systematic comparison of orbital facies maps with detailed ground-based geology observations from the Mars Science Laboratory (MSL) Curiosity rover to examine the validity of geologic interpretations derived from orbital image data. Orbital facies maps were constructed for the Darwin, Cooperstown, and Kimberley...

Stack, Kathryn M.; Edwards, Christopher; Grotzinger, J. P.; Gupta, S.; Sumner, D.; Edgar, Lauren; Fraeman, A.; Jacob, S.; LeDeit, L.; Lewis, K.W.; Rice, M.S.; Rubin, D.; Calef, F.; Edgett, K.; Williams, R.M.E.; Williford, K.H.
K.M. Stack et al., Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale crater, Mars, Icarus (2016), http://dx.doi.org/10.1016/j.icarus.2016.02.024

Year Published: 2016

Barrier island breach evolution: Alongshore transport and bay-ocean pressure gradient interactions

Physical processes controlling repeated openings and closures of a barrier island breach between a bay and the open ocean are studied using aerial photographs and atmospheric and hydrodynamic observations. The breach site is located on Pea Island along the Outer Banks, separating Pamlico Sound from the Atlantic Ocean. Wind direction was a major...

Safak, Ilgar; Warner, John C.; List, Jeffrey H.
Safak, I., J. C. Warner, and J. H. List (2016), Barrier island breach evolution: Alongshore transport and bay-ocean pressure gradient interactions, J. Geophys. Res. Oceans, 121, doi:10.1002/2016JC012029.

Year Published: 2016

Statistical tests of simple earthquake cycle models

A central goal of observing and modeling the earthquake cycle is to forecast when a particular fault may generate an earthquake: a fault late in its earthquake cycle may be more likely to generate an earthquake than a fault early in its earthquake cycle. Models that can explain geodetic observations throughout the entire earthquake cycle may be...

Devries, Phoebe M. R.; Evans, Eileen
DeVries, Phoebe M. R.; Evans, Eileen L., 2016, Statistical tests of simple earthquake cycle models: Geophysical Research Letters, v. 43, n. 23, p. 12,036-12,045, doi:10.1002/2016GL070681.

Year Published: 2016

Cratering on Ceres: Implications for its crust and evolution

Thermochemical models have predicted that Ceres, is to some extent, differentiated and should have an icy crust with few or no impact craters. We present observations by the Dawn spacecraft that reveal a heavily cratered surface, a heterogeneous crater distribution, and an apparent absence of large craters. The morphology of some impact craters is...

Hiesinger, H.; Marchi, S.; Schmedemann, N.; Schenk, P.; Pasckert, J. H.; Neesemann, A.; O'Brien, D. P.; Kneissl, T.; Ermakov, A.; Fu, R.R.; Bland, M. T.; Nathues, A.; Platz, T.; Williams, D.A.; Jaumann, R.; Castillo-Rogez, J. C.; Ruesch, O.; Schmidt, B.; Park, R.S.; Preusker, F.; Buczkowski, D.L.; Russell, C.T.; Raymond, C.A.

Filter Total Items: 2,693
Aerial over lava eruption
May 24, 2018

Kīlauea Volcano —

During HVO's overflight this morning, the fissure

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May 24, 2018

Kīlauea Volcano — Pāhoehoe Flows on Kaupili Street

Fissure 21 produced a Pāhoehoe lava flow that oozed onto Kaupili Street in the Leilani Estates subdivision. Video 1 shows the flow on May 25, around 2:15 a.m. HST.

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Plume rising from the ocean entry
May 24, 2018

Kīlauea Volcano — View of Three Ocean Entries

During today's overflight of the ongoing lower East Rift Zone eruption, HVO geologists noted that fissures 6, 13 and 22 were still erupting, with two channelized flows reaching the ocean. The eastern 

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View of lava fountain
May 24, 2018

Kīlauea Volcano — Fissure 6 Lava Fountain

Fissure 6 fountain, as of around 9:30 a.m. HST today. 

Summit explosion from webcam
May 24, 2018

Kīlauea Volcano — Summit Plume Rising

Poor weather at the summit of Kīlauea has obscured views of Halema‘uma‘u for much of today, but a brief break in the weather around noon allowed HVO's webcam to capture this image of an ash plume rising from the crater at 12:17 p.m. HST. Even though weather has obscured visual observations of the ongoing summit explosions, HVO scientists are able to track them using

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Plume rising from crater
May 23, 2018

Kīlauea Volcano — Plume from Summit

Multiple explosions at Kīlauea's summit occurred throughout today, with some of the ash plumes rising 6,000 to 7,000 feet above sea level. HVO scientists keeping tabs

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Vegetation in foreground up on a beach bluff above flat beach with waves.
May 23, 2018

Sunset State Beach Video Camera 1 dark image

Two video cameras overlook the coast at Sunset State Beach in Watsonville, California. Camera 1 looks northwest while Camera 2 looks north. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes. The various imagery collected:

  • Snapshot: first frame of the video, just like a standard photo
  • Timex (time-exposure):
...
Telephoto view of plume rising from crater
May 23, 2018

Kīlauea Volcano — Plume from Summit (telephoto)

Multiple explosions at Kīlauea's summit occurred throughout today, with some of the ash plumes rising 6,000 to 7,000 feet above sea level. HVO scientists keeping tabs

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Vegetation in foreground up on a beach bluff above flat beach with waves.
May 23, 2018

Sunset State Beach Video Camera 1 snapshot

Two video cameras overlook the coast at Sunset State Beach in Watsonville, California. Camera 1 looks northwest while Camera 2 looks north. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes. The various imagery collected:

  • Snapshot: first frame of the video, just like a standard photo
  • Timex (time-exposure):
...
Ash fall from summit plume
May 23, 2018

Kīlauea Volcano — Ash Fall from Summit Plume

A pulse of ash rises from Halema‘uma‘u as part of semi-continuous emissions at Kīlauea's summit today. Ash can be seen falling from the plume as it is blown downwind in this image, taken around 3:28 p.m. HST.

Vegetation in foreground up on a beach bluff above flat beach with waves.
May 23, 2018

Sunset State Beach Video Camera 1 time-exposure

Two video cameras overlook the coast at Sunset State Beach in Watsonville, California. Camera 1 looks northwest while Camera 2 looks north. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes. The various imagery collected:

  • Snapshot: first frame of the video, just like a standard photo
  • Timex (time-exposure):
...
May 23, 2018

Kīlauea Volcano — Overflight Video Compilation

Compilation of three short videos from helicopter overflights of the 

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Filter Total Items: 405
Date published: February 20, 2014

Media Advisory: USGS to Host Congressional Briefing: Earthquake Science and Remaining Mysteries

It's 1964 in Alaska. Imagine 4.5 minutes of powerful ground shaking underneath you from a magnitude 9.2 earthquake. You and your loved ones are then faced with resulting landslides and a devastating tsunami. You just experienced the largest earthquake ever recorded in North America. 

Date published: February 6, 2014

New Tool Available to Help Track Spilled Oil

A newly developed computer model holds the promise of helping scientists track and predict where oil will go after a spill, sometimes years later.

Date published: January 23, 2014

Threat of Earthquakes Occurring in Central United States Still Alive

Earthquake activity in the New Madrid Seismic Zone in the central United States does not seem to be slowing down.  In a new study published in the journal "Science," seismologists Morgan Page and Susan Hough of the U.S. Geological Survey investigate whether current quakes in the region could be aftershocks of large earthquakes that occurred 200 years earlier.

Date published: January 21, 2014

The Yellowstone Volcano: Past, Present and Future

What is all the buzz about in the Yellowstone area? Is it really dangerous? On January 23rd Jake Lowenstern, Scientist-in-Charge of Yellowstone Volcano Observatory will explain what is happening now with earthquakes, ground uplift, and steam explosions.

Attribution: Natural Hazards
Date published: January 15, 2014

20 Years After Northridge Quake, Buildings Remain Vulnerable

Twenty years ago this week an earthquake struck Northridge, Calif., killing 57 people and revealing a serious defect in a common type of mid-rise building. A new study by U.S. Geological Survey and Caltech engineers, shows that these mid-rise buildings with fracture-prone welds in their steel frames are much more dangerous than they would be if they met current standards.

Date published: January 9, 2014

Potential Geothermal Resources for Akutan, Alaska

Akutan Island, in Alaska’s east-central Aleutian Islands, hosts the City of Akutan and is home to the largest seafood production facility in North America. It also hosts Akutan Volcano, one of the most active volcanoes in the U.S.

Date published: January 8, 2014

New Sensor Network to Detail Virginia Earthquakes

Scientists from the U.S. Geological Survey and Virginia Tech will install a 20-station seismic network in the central Virginia area beginning Jan. 8. The new sensors – each about the size of a soda can – will provide information to help the researchers study the background seismicity in the area and any continuing aftershocks of the Aug. 23, 2011 earthquake near Louisa and Mineral, Va.

Date published: January 8, 2014

Stories of Lava Flows and Volcanic Landscapes from Ka`ū to North Kona Featured in Public Talk

The lava flows and volcanic landscapes along Māmalahoa and Queen Ka‘ahumanu Highways, from Ka‘ū to North Kona, will be the focus of a public talk offered by U.S. Geological Survey Hawaiian Volcano Observatory scientists on Wed., Jan. 22.

Date published: January 3, 2014

Geophysical Studies Reveal Potential Quake Hazard in Spokane Area

Preliminary interpretations of a recent geophysical survey confirm the presence of earthquake faults and reveal the possibility of previously unknown faults beneath the greater Spokane area.

Date published: October 28, 2010

Earthquake Sensors Available to a Good Home

PASADENA, Calif. – The agency responsible for earthquake monitoring across the United States is looking for 35 volunteers in Southern California to host an earthquake sensor in their home.

Attribution: Natural Hazards