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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Lava Lake Decreases from Vent Collapse
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.
Lava Lake Popping
As the spattering shown in the previous video intensifies, the walls of the vent heat even more, causing the cracking of the rocks through thermal expansion to speed up, creating the cacophony of popping noises apparent in this video.
As the spattering shown in the previous video intensifies, the walls of the vent heat even more, causing the cracking of the rocks through thermal expansion to speed up, creating the cacophony of popping noises apparent in this video.
Halema'uma'u West Rim Collapse
This clip, captured by a video camera on the rim of Halema'uma'u to the southwest of the vent, shows a small slice of the western rim of the vent collapsing into the lava lake.
This clip, captured by a video camera on the rim of Halema'uma'u to the southwest of the vent, shows a small slice of the western rim of the vent collapsing into the lava lake.
PubTalk 2/2011 — Is Our Coast in Jeopardy?
-predicting the impact of extreme storms on the California Coast
By Patrick Barnard, USGS Pacific Coastal & Marine Science Center
-predicting the impact of extreme storms on the California Coast
By Patrick Barnard, USGS Pacific Coastal & Marine Science Center
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.
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.
Spattering in Halema'uma'u
As spattering intensifies, the walls of the vent heat even more, causing the cracking of the rocks through thermal expansion to speed up, creating the cacophony of popping noises apparent in this video.
As spattering intensifies, the walls of the vent heat even more, causing the cracking of the rocks through thermal expansion to speed up, creating the cacophony of popping noises apparent in this video.
Thunder Sounds from the Vent in Halema'uma'u
Booming sounds from the vent in Halema'uma'u have been audible around the summit area of Kilauea for the past several days. Some of these sounds are caused by rocks striking the surface of the lava lake, but most are actually the sound of the vent walls cracking due to heating and expansion of rock.
Booming sounds from the vent in Halema'uma'u have been audible around the summit area of Kilauea for the past several days. Some of these sounds are caused by rocks striking the surface of the lava lake, but most are actually the sound of the vent walls cracking due to heating and expansion of rock.
Time-Lapse of Lava Eruption at Pu`u `Ō`ō Crater
Time-lapse movie showing lava erupting from vents on the floor of Pu‘u ‘Ō‘ō crater. Each frame is a composite of eight images comprising a panorama of the crater that is captured every five minutes. During daylight hours, the camera switches to an IR mode so that eruptive activity is easier to monitor.
Time-lapse movie showing lava erupting from vents on the floor of Pu‘u ‘Ō‘ō crater. Each frame is a composite of eight images comprising a panorama of the crater that is captured every five minutes. During daylight hours, the camera switches to an IR mode so that eruptive activity is easier to monitor.
Earthquake Awareness and Seismic Retrofitting in the Central U.S.
Earthquake Awareness and Seismic Retrofitting in the Central U.S.Description available soon
Earthquake Preparedness in the Central U.S.
Description available soon
Information Sources for the 1811-1812 New Madrid Earthquakes
Information Sources for the 1811-1812 New Madrid EarthquakesDescription available soon
Jim Wilkinson: CUSEC
Description available soon
Tish Tuttle: Prehistoric New Madrid Earthquakes
Description available soon
Ice breakup on the Skunk River at Augusta, IA
This video captures the breakup of ice cover on the Skunk River at Augusta, Iowa, on February 17, 2011, at approximately 3:00 pm CST. The river stage at the time was 14.50 feet (elevation 535.74 feet NGVD29). A preliminary estimate of the discharge at the time of the ice breakup is 9,500 cubic feet per second.
This video captures the breakup of ice cover on the Skunk River at Augusta, Iowa, on February 17, 2011, at approximately 3:00 pm CST. The river stage at the time was 14.50 feet (elevation 535.74 feet NGVD29). A preliminary estimate of the discharge at the time of the ice breakup is 9,500 cubic feet per second.
Small Explosive Event at Kīlauea's Summit
Another series of collapses occurred within Kīlauea's summit vent on the floor of Halema‘uma‘u before sunrise on February 15. This movie shows the first of the rockfalls and the resulting small explosive event.
Another series of collapses occurred within Kīlauea's summit vent on the floor of Halema‘uma‘u before sunrise on February 15. This movie shows the first of the rockfalls and the resulting small explosive event.
Ice Jam on the Little Nemaha River at Auburn, Nebraska
Ice Jam on the Little Nemaha River at Auburn, NebraskaA 1-minute video shows ice flows on the Little Nemaha River at the streamgaging station at Auburn, Nebraska.
Ice Jam on the Little Nemaha River at Auburn, Nebraska
Ice Jam on the Little Nemaha River at Auburn, NebraskaA 1-minute video shows ice flows on the Little Nemaha River at the streamgaging station at Auburn, Nebraska.
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
Lessons Learned About the New Madrid Fault Zone
Description available soon
The Seismic Network in the Central U.S.
Description available soon
Lava Flows in Pu`u `Ō`ō Crater
Movie of lava flows in Pu‘u ‘Ō‘ō crater from February 6-8. Lava has been erupting sporadically from three vents within Pu‘u ‘Ō‘ō crater-a cone on the west side of the crater floor (foreground to left), a cone on the northeast side (center frame), and from an opening on the east crater wall (background).
Movie of lava flows in Pu‘u ‘Ō‘ō crater from February 6-8. Lava has been erupting sporadically from three vents within Pu‘u ‘Ō‘ō crater-a cone on the west side of the crater floor (foreground to left), a cone on the northeast side (center frame), and from an opening on the east crater wall (background).