Using geoscience to help understand whether health risks lurk in particles produced by disasters
By Geoff Plumlee, Research Geochemist
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Yellowstone Monthly Updates
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Sounds of Yellowstone
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Image of the Week
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PubTalk 11/2007 — Disasters, Dust, .... and Danger?
Using geoscience to help understand whether health risks lurk in particles produced by disasters
By Geoff Plumlee, Research Geochemist
Perched Lava Channel - July 21, 2007 Eruption (November 15, 2007)
Just after midnight on July 21, 2007, a new fissure eruption broke out on the eastern flank of the Pu'u 'O'o cone (http://hvo.wr.usgs.gov/pressreleases/pr07_21_07.html).
Just after midnight on July 21, 2007, a new fissure eruption broke out on the eastern flank of the Pu'u 'O'o cone (http://hvo.wr.usgs.gov/pressreleases/pr07_21_07.html).
(Trailer) Riding the Storm—Landslide Danger in San Francisco Bay Area
Video Highlights:
* A catastrophic 1982 rainstorm triggered 18,000 landslides in the Bay Area, claiming 25 lives and causing $66 million in property damage
* The combination of steep slopes, weak rocks, and intense winter storms make Bay Area uplands an ideal setting for landslides
Video Highlights:
* A catastrophic 1982 rainstorm triggered 18,000 landslides in the Bay Area, claiming 25 lives and causing $66 million in property damage
* The combination of steep slopes, weak rocks, and intense winter storms make Bay Area uplands an ideal setting for landslides
PubTalk 10/2007 — Fire As An Ecosystem Process
Past, Present, And Future
By Jon E. Keeley, Research Ecologist
Past, Present, And Future
By Jon E. Keeley, Research Ecologist
Marmot Dam Removal, Sandy River, Oregon: Time-Lapse
The USGS put together time-lapse video of the breach of the Marmot Dam, on the Sandy River in Oregon. Hydrology experts from the USGS Oregon Water Science Center and the USGS Cascades Volcano Observatory are studying this removal, the largest planned removal in the Pacific Northwest thus far.
The USGS put together time-lapse video of the breach of the Marmot Dam, on the Sandy River in Oregon. Hydrology experts from the USGS Oregon Water Science Center and the USGS Cascades Volcano Observatory are studying this removal, the largest planned removal in the Pacific Northwest thus far.
Grizzly Bear and Cub in Bear Hair Trap
Grizzly bear and her cub visit a bear hair trap in Glacier National Park. The bear leaves hair samples snagged on the barbed wire as it enters and exits the site. Both bears vigorously rub in the lure pile which is a pile forest debris that had a liquid scent lure poured on it.
Grizzly bear and her cub visit a bear hair trap in Glacier National Park. The bear leaves hair samples snagged on the barbed wire as it enters and exits the site. Both bears vigorously rub in the lure pile which is a pile forest debris that had a liquid scent lure poured on it.
PubTalk 9/2007 — A Tale of Two Kelp Forests
Sea Otters and Ecosystem Dynamics in the Aleutians and the Commander Islands
By Tim Tinker, Research Biologist, University of California, Santa Cruz
Sea Otters and Ecosystem Dynamics in the Aleutians and the Commander Islands
By Tim Tinker, Research Biologist, University of California, Santa Cruz
Dome fountain over Fissure D vent of the Episode 58 eruption
(September 20, 2007, 05:00:03 to 09:00:03) As the Episode 58 lava channel developed, the upper end of the channel crusted over so that lava—extruding from the erupting fissure—flowed through a short tube before entering the channel.
(September 20, 2007, 05:00:03 to 09:00:03) As the Episode 58 lava channel developed, the upper end of the channel crusted over so that lava—extruding from the erupting fissure—flowed through a short tube before entering the channel.
Dome Fountain Over Fissure D of the July 21, 2007 Eruption (September 20, 2007)
Just after midnight on July 21, 2007, a new fissure eruption broke out on the eastern flank of the Pu'u 'O'o cone (http://hvo.wr.usgs.gov/pressreleases/pr07_21_07.html).
Just after midnight on July 21, 2007, a new fissure eruption broke out on the eastern flank of the Pu'u 'O'o cone (http://hvo.wr.usgs.gov/pressreleases/pr07_21_07.html).
Long-term evolution of the Episode 58 lava channel
(September 8 to November 30, 2007) Within days of the onset of Episode 58 on July 21, 2008, activity localized on the easternmost eruptive fissure—Fissure D—and channelized lava began flowing to the northeast. Repeated overflows from the channel added slowly to its height, and the channel became perched up to 45 meters above the pre-existing lava surface.
(September 8 to November 30, 2007) Within days of the onset of Episode 58 on July 21, 2008, activity localized on the easternmost eruptive fissure—Fissure D—and channelized lava began flowing to the northeast. Repeated overflows from the channel added slowly to its height, and the channel became perched up to 45 meters above the pre-existing lava surface.
Grizzly Bear Rubbing Tree and Log
This is two video clips captured at the same site from two different angles. The rub trees are on one side of the trail and the excavated log is on the other side. Bears that rub on one or more of the trees often visit the log as well.
This is two video clips captured at the same site from two different angles. The rub trees are on one side of the trail and the excavated log is on the other side. Bears that rub on one or more of the trees often visit the log as well.
Aerial of eddy in channel near vent D
Aerial of eddy in channel near vent D
Aerial of eddy in channel near vent D
Monsoon-Rain Flow in an Ephemeral Channel near Sierra Vista, Arizona
As part of the assessment of the binational San Pedro aquifer, the effects of urbanization on runoff in ephemeral streams was studied. Ephemeral streams are those that flow in response to precipitation. Runoff in tributaries to the San Pedro River is important in understanding the water budget of the river.
As part of the assessment of the binational San Pedro aquifer, the effects of urbanization on runoff in ephemeral streams was studied. Ephemeral streams are those that flow in response to precipitation. Runoff in tributaries to the San Pedro River is important in understanding the water budget of the river.
PubTalk 8/2007 — Dark Holes in Muir's "Range of Light"
Insights from southern Sierra Nevada caves and karst
By John C. Tinsley, Geologist
Insights from southern Sierra Nevada caves and karst
By John C. Tinsley, Geologist
Black Bear Cub Rubbing on a Tree
Black bear cub awkwardly rubs on a bear rub tree regularly used by bears in Glacier National Park.
Black bear cub awkwardly rubs on a bear rub tree regularly used by bears in Glacier National Park.
Grizzly Bear with Cubs Charges Wolf
A wolf feeds on a road-killed elk carcass in the morning. A grizzly bear with two cubs feeds on the carcass in the evening. A grizzly bear will chuff and pop its jaw when it feels threatened. Sometimes it will also charge at the threat, usually veering off or stopping short -- a bluff charge.
A wolf feeds on a road-killed elk carcass in the morning. A grizzly bear with two cubs feeds on the carcass in the evening. A grizzly bear will chuff and pop its jaw when it feels threatened. Sometimes it will also charge at the threat, usually veering off or stopping short -- a bluff charge.
Looking down the channel of Fissure D
Looking down the channel of Fissure D
Looking down the channel of Fissure D
PubTalk 7/2007 — Plate Tectonics in Action
Exploring the Earth with the new edition of This Dynamic Planet map and Web site
By Robert Tilling, Volcanologist, and Stephen Kirby, Earthquake Geophysicist
Exploring the Earth with the new edition of This Dynamic Planet map and Web site
By Robert Tilling, Volcanologist, and Stephen Kirby, Earthquake Geophysicist
Collapse and refilling of Pu‘u ‘Ō‘ō crater
(June 10 to July 25, 2007) During June 17–19, 2007, an intrusion into Kīlauea's upper east rift zone (Episode 56) led to the cessation of eruptive activity at Pu‘u ‘Ō‘ō and the collapse of the Pu‘u ‘Ō‘ō crater floor (Poland and others, 2008).
(June 10 to July 25, 2007) During June 17–19, 2007, an intrusion into Kīlauea's upper east rift zone (Episode 56) led to the cessation of eruptive activity at Pu‘u ‘Ō‘ō and the collapse of the Pu‘u ‘Ō‘ō crater floor (Poland and others, 2008).
Refilling of Pu‘u ‘Ō‘ō crater
(July 13, 2007, 14:00:30 to 21:00:36) Episode 57 was driven by the eruption of lava from two vents—one on the west-central part of the crater floor and the other on the eastern side of the crater.
(July 13, 2007, 14:00:30 to 21:00:36) Episode 57 was driven by the eruption of lava from two vents—one on the west-central part of the crater floor and the other on the eastern side of the crater.
Refilling of Pu'u 'O'o Crater (July 13, 2007)
On June 17-19, 2007, and intrusion into Kilauea's upper east rift zone led to the cessation of eruptive activity at Pu'u 'O'o and the collapse of the Pu'u 'O'o crater floor.
On June 17-19, 2007, and intrusion into Kilauea's upper east rift zone led to the cessation of eruptive activity at Pu'u 'O'o and the collapse of the Pu'u 'O'o crater floor.