1906 earthquake damage to home on Howard and 17th Streets in San Francisco. Liquefaction, the phenomenon of saturated soils losing their stiffness and strength during shaking, caused structures to tilt and collapse.
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1906 Earthquake Damage to Home in San Francisco
1906 earthquake damage to home on Howard and 17th Streets in San Francisco. Liquefaction, the phenomenon of saturated soils losing their stiffness and strength during shaking, caused structures to tilt and collapse.
San Francisco in ruins, 1906
One of the most well-known photographs by George R. Lawrence, taken May 28, 1906, about 6 weeks after the Great San Francisco earthquake which occurred on April 18. The 160-degree panorama was taken from a camera suspended from a kite 2,000 feet in the air. The view looks up Market Street with the waterfront and Union Ferry Building in the foreground.
One of the most well-known photographs by George R. Lawrence, taken May 28, 1906, about 6 weeks after the Great San Francisco earthquake which occurred on April 18. The 160-degree panorama was taken from a camera suspended from a kite 2,000 feet in the air. The view looks up Market Street with the waterfront and Union Ferry Building in the foreground.
Mount Scott Lookout seismic and GPS volcano monitoring station, vie...
Mount Scott Lookout seismic and GPS volcano monitoring station, view from the southwest. Near Crater Lake, Oregon.
Mount Scott Lookout seismic and GPS volcano monitoring station, view from the southwest. Near Crater Lake, Oregon.
Deformation monitoring equipment—GPS antenna maintenance on south s...
Deformation monitoring equipment—GPS antenna maintenance on south side of Crater Lake National Park Boathouse on Wizard Island. Oregon
Deformation monitoring equipment—GPS antenna maintenance on south side of Crater Lake National Park Boathouse on Wizard Island. Oregon
Dome building episode from 2004-2008 at Mount St. Helens can be obs...
Dome building episode from 2004-2008 at Mount St. Helens can be observed and measured with these two digital elevation models (DEMs) developed before and after the eruptive episode.
Dome building episode from 2004-2008 at Mount St. Helens can be observed and measured with these two digital elevation models (DEMs) developed before and after the eruptive episode.
Children pose with 8 ton ballistic block at Kīlauea, Hawai‘i.
Some of the large ballistic blocks from the Kīlauea eruption of 1924 later became visitor attractions. Many of these blocks remain in place today as evidence of the forces unleashed at Kīlauea during the eruption of 1924.
Some of the large ballistic blocks from the Kīlauea eruption of 1924 later became visitor attractions. Many of these blocks remain in place today as evidence of the forces unleashed at Kīlauea during the eruption of 1924.
Topographic map, Mount St. Helens, C.E. 1919 annotated with locatio...
Due to the cataclysmic eruption of May 18, 1980, many of the locations annotated on this map are now either covered or no longer visible.
Due to the cataclysmic eruption of May 18, 1980, many of the locations annotated on this map are now either covered or no longer visible.
Geothermal ice cave at Mount Baker's summit formed by melting of a ...
Geothermal ice cave at Mount Baker's summit formed by melting of a glacier due to increased heat from subsurface magma and fumarole on the surface expelling hot gasses.
Geothermal ice cave at Mount Baker's summit formed by melting of a glacier due to increased heat from subsurface magma and fumarole on the surface expelling hot gasses.
Mount Hood dominates the skyline outside of Portland, OR on a clear...
Mount Hood dominates the skyline outside of Portland, Oregon on a clear day. An major eruption of Mount Hood would pose a great hazard to the regional economy.
Mount Hood dominates the skyline outside of Portland, Oregon on a clear day. An major eruption of Mount Hood would pose a great hazard to the regional economy.
Testing bathymetric equipment at Coldwater Lake, Mount St. Helens
Adam Mosbrucker tests equipment (Acoustic Doppler Current Profiler, survey-grade RTK-GPS and a map-grade GPS) in preparation for a lake bottom survey.
Adam Mosbrucker tests equipment (Acoustic Doppler Current Profiler, survey-grade RTK-GPS and a map-grade GPS) in preparation for a lake bottom survey.
Horizontal displacement vectors at Mount St. Helens (2008-2014)
Map of horizontal displacement vectors for Global Positioning System (GPS) stations in and around Mount St. Helens. Blue arrows show the direction and magnitude of horizontal movement, as measured at the GPS station from 2008-2014. The total horizontal displacement is indicated in millimeters (mm) and inches (in).
Map of horizontal displacement vectors for Global Positioning System (GPS) stations in and around Mount St. Helens. Blue arrows show the direction and magnitude of horizontal movement, as measured at the GPS station from 2008-2014. The total horizontal displacement is indicated in millimeters (mm) and inches (in).
Shaded relief map of Kīlauea's summit with caldera
Shaded relief map of Kīlauea Volcano's summit with caldera bounding faults delineated.
Shaded relief map of Kīlauea Volcano's summit with caldera bounding faults delineated.
Mammoth Hot Springs at YNP, Wyoming.
Mammoth Hot Springs at Yellowstone National Park, Wyoming.
Mammoth Hot Springs at Yellowstone National Park, Wyoming.
CalVO staff
CalVO staff assembled in the Rambo Auditorium, Menlo Park, CA
CalVO staff assembled in the Rambo Auditorium, Menlo Park, CA
Tracking the advance of Crater Glacier at Mount St. Helens, WA
Information regarding volume and rates of advance for the crevassed Crater Glacier at Mount St. Helens, Washington, are extracted from Digital Elevation Models created from aerial photography. The red line shows the extent of Crater Glacier in 2012. Since 2012, the glacier has advanced about 50 m (160 ft) down the Loowit channel.
Information regarding volume and rates of advance for the crevassed Crater Glacier at Mount St. Helens, Washington, are extracted from Digital Elevation Models created from aerial photography. The red line shows the extent of Crater Glacier in 2012. Since 2012, the glacier has advanced about 50 m (160 ft) down the Loowit channel.
Technologies track surface changes at Yellowstone.
Summer geology intern Mindy Juergenson climbs over downed lodgepole pine trees killed in the fire of 1988 as she packs a GPS station out of the field (inset). Nine temporary stations are deployed each April/May and retrieved in October/November. The temporary stations supplement a network of permanent stations that record ground deformation data year-round.
Summer geology intern Mindy Juergenson climbs over downed lodgepole pine trees killed in the fire of 1988 as she packs a GPS station out of the field (inset). Nine temporary stations are deployed each April/May and retrieved in October/November. The temporary stations supplement a network of permanent stations that record ground deformation data year-round.
Leveling measurements of the slope of the Mount St. Helens' crater ...
Tiltmeters allowed 24-hour monitoring as the information was telemetered back to CVO. Other instruments such as displacement meters for measuring cracks, seismometers for measuring earthquakes, gas sensors for measuring gas concentrations, and magnetometers for measuring the magnetic field, were also used for 24-hour monitoring.
Tiltmeters allowed 24-hour monitoring as the information was telemetered back to CVO. Other instruments such as displacement meters for measuring cracks, seismometers for measuring earthquakes, gas sensors for measuring gas concentrations, and magnetometers for measuring the magnetic field, were also used for 24-hour monitoring.
CGPS-SPGPS Comparison
Top panel shows a continuous GPS station located in Yellowstone National Park. The antenna is secured to the ground by several metal poles, and a nearby set of solar panels provides power to the station. Lower panel shows a semipermanent GPS station, with a small solar array for power and an antenna located close to the ground.
Top panel shows a continuous GPS station located in Yellowstone National Park. The antenna is secured to the ground by several metal poles, and a nearby set of solar panels provides power to the station. Lower panel shows a semipermanent GPS station, with a small solar array for power and an antenna located close to the ground.
A bathymetric contour map of Castle Lake, Mount St. Helens.
Researchers map the bottom of Castle Lake, near Mount St. Helens. For three days, researchers ran a small boat over the lake surface equipped with an acoustic Doppler current profiler (ADCP). The ADCP bounces an acoustic wave off the bottom that is reflected back to a mobile receiver in the boat.
Researchers map the bottom of Castle Lake, near Mount St. Helens. For three days, researchers ran a small boat over the lake surface equipped with an acoustic Doppler current profiler (ADCP). The ADCP bounces an acoustic wave off the bottom that is reflected back to a mobile receiver in the boat.
Erratics located on a cinder cone about 5 km (3 mi) NE of Newberry
Erratics located on a cinder cone on the northeast flank of Newberry Volcano, Oregon.
Erratics located on a cinder cone on the northeast flank of Newberry Volcano, Oregon.
Before the eruption of May 18, 1980, Mount St. Helens' elevation wa...
Mount Adams elevation is 3,745 m (12, 286 ft). Mount St. Helens was the smallest of five major volcanic peaks in Washington State.
Mount Adams elevation is 3,745 m (12, 286 ft). Mount St. Helens was the smallest of five major volcanic peaks in Washington State.