The level of the lava lake sometimes changes abruptly. These cycles of rise and fall, which amount to a vertical change of around 15 m (about 50 ft), are occasionally triggered by rockfalls. Here, a small collapse from the vent wall triggers degassing and a drop in the lava level.
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Rockfall in Halema'uma'u
The level of the lava lake sometimes changes abruptly. These cycles of rise and fall, which amount to a vertical change of around 15 m (about 50 ft), are occasionally triggered by rockfalls. Here, a small collapse from the vent wall triggers degassing and a drop in the lava level.
Earthquake Awareness and Seismic Retrofitting in the Central U.S.
Earthquake Awareness and Seismic Retrofitting in the Central U.S.Description available soon
Tish Tuttle: Prehistoric New Madrid Earthquakes
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Earthquake Preparedness in the Central U.S.
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Information Sources for the 1811-1812 New Madrid Earthquakes
Information Sources for the 1811-1812 New Madrid EarthquakesDescription available soon
Jim Wilkinson: CUSEC
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Lessons Learned About the New Madrid Fault Zone
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Earthquake Features - Historic Evidence in Arkansas
Earthquake Features - Historic Evidence in ArkansasDescription available soon
Effects and Accounts of the 1811-1812 New Madrid Earthquakes
Effects and Accounts of the 1811-1812 New Madrid EarthquakesDescription available soon
The Seismic Network in the Central U.S.
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Local Travel Time Tomography in the Central U.S.
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Jim Wilkinson: Upcoming Events
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ARkStorm
The ARkStorm scenario led by the USGS and hundreds of scientists and experts from many disciplines details impacts of a scientifically plausible storm similar to the Great California Storm of 1862 in the modern day.
The ARkStorm scenario led by the USGS and hundreds of scientists and experts from many disciplines details impacts of a scientifically plausible storm similar to the Great California Storm of 1862 in the modern day.
Seismic Imaging the Central U.S.
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3D Hazard Map, Attenuation in the Central U.S.
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Tish Tuttle: Paleoseismology
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Description available soon
Channelized Lava Flow
A channelized flow that broke out of the lava tube early this morning at the base of the pali, west of Kalapana. Even after traveling through the lava tube system for almost 10 kilometers (about 6.2 miles), the lava is sufficiently hot to be extremely fluid, and moves swiftly downslope. For scale, the channel is about 2 meters (about 2 yards) wide.
A channelized flow that broke out of the lava tube early this morning at the base of the pali, west of Kalapana. Even after traveling through the lava tube system for almost 10 kilometers (about 6.2 miles), the lava is sufficiently hot to be extremely fluid, and moves swiftly downslope. For scale, the channel is about 2 meters (about 2 yards) wide.
Pu'u 'O 'o Producing Spattering
The flow began erupting in Pu'u 'O 'o crater this morning. The primary vent for the flow was producing small pulsating spattering that had built a small rampart on its south side. The final portion of the video is shown at x10 speed with a wide view, and shows how the spattering vent is supplying the flow.
The flow began erupting in Pu'u 'O 'o crater this morning. The primary vent for the flow was producing small pulsating spattering that had built a small rampart on its south side. The final portion of the video is shown at x10 speed with a wide view, and shows how the spattering vent is supplying the flow.
Littoral Explosions at Puhi-o-Kalaikini Ocean Entry
Littoral Explosions at Puhi-o-Kalaikini Ocean EntryA short period of successive littoral explosions at the Puhi-o-Kalaikini ocean entry, where lava exiting the tube enters the water. The explosions were throwing ejecta up to about 20 meters. The video was taken with a high zoom factor from the top of the sea cliff, well away from the entry point and not on the lava delta.
Littoral Explosions at Puhi-o-Kalaikini Ocean Entry
Littoral Explosions at Puhi-o-Kalaikini Ocean EntryA short period of successive littoral explosions at the Puhi-o-Kalaikini ocean entry, where lava exiting the tube enters the water. The explosions were throwing ejecta up to about 20 meters. The video was taken with a high zoom factor from the top of the sea cliff, well away from the entry point and not on the lava delta.
Lava Lake at Halema'uma'u Crater
The lava lake deep within the vent cavity at Halema'uma'u crater remains active, with ongoing degassing and circulation of lava. This Quicktime movie shows the view in the vent today with a thermal camera, and the video is set at x4 speed to better show the slowly moving lava surface.
The lava lake deep within the vent cavity at Halema'uma'u crater remains active, with ongoing degassing and circulation of lava. This Quicktime movie shows the view in the vent today with a thermal camera, and the video is set at x4 speed to better show the slowly moving lava surface.
Mount St. Helens: May 18, 1980
USGS scientists recount their experiences before, during and after the May 18, 1980 eruption of Mount St. Helens. Loss of their colleague David A. Johnston and 56 others in the eruption cast a pall over one of the most dramatic geologic moments in American history.
USGS scientists recount their experiences before, during and after the May 18, 1980 eruption of Mount St. Helens. Loss of their colleague David A. Johnston and 56 others in the eruption cast a pall over one of the most dramatic geologic moments in American history.