USGS Multimedia Gallery Video Collection for: Natural Hazards

http://gallery.usgs.gov/images/logos/usgs_only.jpg USGS Multimedia Gallery Video Collection for: Natural Hazards http://gallery.usgs.gov/ en-us OC_Web@usgs.gov (Office of Communications Web Group) http://gallery.usgs.gov/images/USGS.gif USGS http://gallery.usgs.gov/ <![CDATA[October 1, 2004 Explosion at Mount St. Helens]]> http://gallery.usgs.gov/videos/682 On October 1, 2004, an explosion in the crater of Mount St. Helens sent ash and water vapor several thousand feet into the air. It was the dramatic beginning of an eruption that continued for the next 3+ years. The explosion fractured Crater Glacier and hurled rocks for at least one-half mile across the western half of the glacier and the 1980-1986 lava dome. USGS scientists on a helicopter flight captured the explosion on video. The view from the air is to the west.

]]> <![CDATA[Whitewater-Baldy Fire]]> http://gallery.usgs.gov/videos/645 USGS installed six early-flood-warning units�rain and stream gages�in the burned areas resulting from New Mexico�s Whitewater-Baldy Fire. The gages transmit data via satellite to provide warnings to communities that may be affected by flooding.

]]> <![CDATA[Volcanic Monitoring Animations #3: Earthquakes]]> http://gallery.usgs.gov/videos/660 Earthquakes serve as an early warning sign for volcanic eruptions, as well as a marker for the location of moving magma. This animation shows magma movement beneath a volcano, simulated seismograms, volcanic tremor and seismicity associated with an impending eruption.

]]> <![CDATA[Volcano Monitoring Animations #1: Volcano Deformation]]> http://gallery.usgs.gov/videos/661 Moving magma can deform the surface of the Earth. This animation shows how a tiltmeter and GPS are used to detect the subtle signs that tell scientists something about what is going on beneath the surface.

]]> <![CDATA[Volcano Monitoring Animation #2: Gas Monitoring]]> http://gallery.usgs.gov/videos/662 This animation shows how gases behave in magma and how an airplane-mounted UV spectrometer can measure gases in a volcanic plume.

]]> <![CDATA[Time-series of dome and glacier growth at Mount St. Helens, Washington, 2004-2012]]> http://gallery.usgs.gov/videos/627 The video shows time-lapse changes in the lava dome and Crater Glacier from 2004-2012. The images were created from 1:12,000 scale vertical aerial photographs combined with ground control points from campaign GPS and targets. Photogrammetry software was used to collect a 3-D point cloud and combined to make a digital elevation model (DEM). Information regarding volume and rates of growth of the lava dome and glacier are extracted from DEMs to monitor surface changes in the crater.

]]> <![CDATA[Time-lapse images of Mount St. Helens dome growth 2004-2008]]> http://gallery.usgs.gov/videos/628 The rapid onset of unrest at Mount St. Helens on September 23, 2004 initiated an uninterrupted lava-dome-building eruption that continued until 2008. The initial phase produced rapid growth of a lava dome as magma pushed upward. As shown in the video, an initial succession of lava spines, two recumbent and one steeply sloping, grew to nearly 500 m in length before disintegrating into mounds of rubble. The trajectory of lava extrusion was affected by the geometry of the crater, particularly the proximity of the vent to the south crater wall, and by the growing volume of erupted material.

]]> <![CDATA[Volcano Web Shorts #5: Volcanic Ash Impacts]]> http://gallery.usgs.gov/videos/625 Volcanic ash is geographically the most widespread of all volcanic hazards. USGS geologist Larry Mastin describes how volcanic ash can disrupt lives many thousands of miles from an erupting volcano. The development of ash cloud models and ash cloud disruption to air traffic is highlighted.

]]> <![CDATA[Volcano Web Shorts 6: Societal Impacts of Volcanism]]> http://gallery.usgs.gov/videos/607 USGS geologist, Angie Diefenbach, describes how she uses GIS, (Geographic Information Systems) software to study volcanic eruptions and their impacts on society.

]]> <![CDATA[Volcano Web Shorts 3: Seismology]]> http://gallery.usgs.gov/videos/605 USGS volcano seismologist, Seth Moran, describes how seismology and seismic networks are used to mitigate volcanic hazards.

]]> <![CDATA[Volcano Web Shorts 4-Instruments]]> http://gallery.usgs.gov/videos/626 USGS technologist Rick LaHusen describes how the development and deployment of instruments plays a crucial role in mitigating volcanic hazards.

]]> <![CDATA[Volcano Web Shorts 2: Debris Flows]]> http://gallery.usgs.gov/videos/604 Debris flows are hazardous flows of rock, sediment and water that surge down mountain slopes and into adjacent valleys. Hydrologist Richard Iverson describes the nature of debris-flow research and explains how debris flow experiments are conducted at the USGS Debris Flow Flume, west of Eugene, Oregon. Spectacular debris flow footage, recorded by Franck Lavigne of the Universite Paris, makes clear the destructive power of these flows.

]]> <![CDATA[Volcano Web Shorts 1: Photogrammetry]]> http://gallery.usgs.gov/videos/603 Photogrammetry is the science of making precise measurements by the use of photography. USGS geologist Angie Diefenbach describes how she uses a digital camera and computer software to understand the growth rate of lava domes during a volcanic eruption.

]]> <![CDATA[Mount St. Helens' Runaway Glacier: A time-lapse video of Crater Glacier�s response to lava dome growth]]> http://gallery.usgs.gov/videos/593 From 2005 to 2010, the U.S. Geological Survey-Cascades Volcano Observatory operated a remote camera on the northwest flank of Mount St. Helens. Looking into the crater, the camera captured hourly photographs of volcanic dome growth during the 2004-2008 eruption. The station also captured the advance of the west arm of Crater Glacier as it moved northeast around the 1980-1986 and 2004-2008 lava domes, joined with the east arm of the glacier, and pushed northward onto the crater floor. The time-lapse sequence links individual photographs to produce a video of the movement of Crater Glacier, showing the glacier�s remarkable run-away response to volcanic dome growth.

]]> <![CDATA[San Francisco, California Bay Area Earthquake Hazards and Preparedness]]> http://gallery.usgs.gov/videos/592 This video presents information on historical and recent earthquake activity in the Bay Area of California. Experts discuss scientific and engineering issues, as well as personal safety and community well-being. The 7 Steps to Safety are neatly outlined, showing families how to be prepared before, during, and after an earthquake.

]]> <![CDATA[The Greatest Natural Disaster in Ohio History: The Flood of 1913]]> http://gallery.usgs.gov/videos/589 Devastation from the 1913 flood is shown primarily through photographs taken during the March 1913 flood. In the aftermath of the 1913 flood, State and Federal funds were allocated for the installation of a streamgage network to monitor the water level and flow of Ohio's rivers and streams. The modern streamgaging network and uses of streamflow data are described.

]]> <![CDATA[Living Near the Epicenter]]> http://gallery.usgs.gov/videos/566 Watch video interviews with four people discussing their experiences near the epicenter of the magnitude 5.8 earthquake in central Virginia on August 23, 2011. Tens of millions of people in the eastern U.S. and southeastern Canada were startled by sudden ground shaking from this earthquake, which was among the largest to occur in this region in the last century.

]]> <![CDATA[Chasing the Mud: The Mississippi River Flood of 2011]]> http://gallery.usgs.gov/videos/545 The 2011 Mississippi River flood was among the largest and most damaging to occur along this waterway in the past century. This major flood event dramatically increased the flow of water and sediment down the main channel of the Mississippi River and its tributary, the Atchafalaya River. To alleviate pressure on the levee system and control structures, water and sediment were diverted from the river into swamps and marshes in the Atchafalaya basin and Lake Pontchartrain. In contrast to negative impacts to human communities, the flood potentially delivered nourishing sediment to wetlands in the Mississippi River delta plain. This video follows one group of scientists as they investigate sediment deposition in the wetlands of the Mississippi River delta plain. The results of this investigation will lead to a better understanding of how extreme flood events influence sedimentation in wetlands and also will inform efforts to restore the deteriorating marshes of the Mississippi River Delta.

]]> <![CDATA[Time Lapse Photography of Tropical Storm Lee Flooding (near streamgage 1645704)]]> http://gallery.usgs.gov/videos/446 The camera was set up to frequently take pictures of the stream during Hurricane Lee. This photography is part of a larger project by the USGS National Research Program, the Virginia Water Science Center and the Maryland Water Science Center examining sediment flow.

Difficult Run (near USGS streamgage 1645704)

]]> <![CDATA[Time Lapse Photography of Tropical Storm Lee Flooding (downstream of W&OD Trail)]]> http://gallery.usgs.gov/videos/447 The camera was set up to frequently take pictures of the stream during Hurricane Lee. This photography is part of a larger project by the USGS National Research Program, the Virginia Water Science Center and the Maryland Water Science Center examining sediment flow.

Difficult Run near USGS streamgage 1645704 and Difficult Run downstream of W&OD Trail

]]> <![CDATA[Live Chat: East Coast Earthquakes]]> http://gallery.usgs.gov/videos/441 A live, online chat about East Coast earthquakes and the Virginia 5.8M earthquake that occurred on August 23, 2011, with Dr. Michael Blanpied, Associate Coordinator for the USGS Earthquake Hazards Program.

]]> <![CDATA[2011: Interior Thanks USGS for Flood Efforts]]> http://gallery.usgs.gov/videos/440 Devastating floods across much of the U.S. were severe and unrelenting during the spring and summer of 2011. Countless USGS crews responded to the floods. Often working in dangerous conditions, USGS scientists measured streamflow and river levels, repaired and installed streamgages, measured water quality, and documented river changes. This science is critical for flood preparations and response. In this video, Anne Castle, Department of the Interior Assistant Secretary for Water and Science, thanks USGS for its effort.

]]> <![CDATA[Earthquakes - Shock Waves]]> http://gallery.usgs.gov/videos/438 This short excerpt is from a USGS/Bay Area Earthquake Alliance produced television program �Shock Waves: 100 Years After the 1906 Earthquake�. This specific segment describes some of the history behind our modern understanding of the earthquake process. The program received numerous industry awards and was nominated for a regional Emmy Award in the Bay area. It aired twice on KPIX CBS5 and its affiliate station around the time of the April 18, 2006, 100 year anniversary of the Great San Francisco Earthquake.

]]> <![CDATA[Post-fire Flash Flood in Coronado National Memorial, Arizona]]> http://gallery.usgs.gov/videos/437 Video footage begins with dry streambed, and within the first 10 seconds a very dark, roiling, ash-laden flood comes flowing downstream toward the viewer. The rest of the video is footage of the flood flow going past, and into a culvert under a bridge. The video was recorded at the U.S. Geological Survey stream gage site near the Coronado National Memorial visitor center, in southern Arizona. The flow event was the result of rain higher up in the basin, which includes the Montezuma Pass overlook area. The video includes the sound of rushing water as the flow event sweeps downstream.

]]> <![CDATA[Spattering Near Propagating Fissure]]> http://gallery.usgs.gov/videos/422 Spattering near the front of the propagating fissure.

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