Total precipitation simulation for Arctic Alaska
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Yellowstone Monthly Updates
Yellowstone Monthly Updates
Learn about interesting stories of Yellowstone, and the past month's volcanic activity from Mike Poland, Scientist-in-Charge at the Yellowstone Volcano Observatory (YVO).
Sounds of Yellowstone
Sounds of Yellowstone
The USGS Sounds of Yellowstone series lets you listen to the natural sounds of geysers, hot springs, and mudpots found through Yellowstone National Park in Wyoming, USA.
Image of the Week
Image of the Week
A weekly series from the USGS Earth Resources Observation and Science (EROS) Center highlighting satellite image(s) featuring striking changes to the Earth's surface.
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WRF Model Output: Total Precipitation Simulation
Total precipitation simulation for Arctic Alaska
Gas Pistons Within Drainhole Vent at Pu‘u ‘Ō‘ō
(June 2, 2006, 18:30:02 to June 3, 2006, 02:00:03) Gas-pistoning is an interesting phenomenon seen at Kīlauea and some other basalticvolcanoes. It is caused by the accumulation of gas near the top of the lava column within a volcanic vent (Swanson and others, 1979).
(June 2, 2006, 18:30:02 to June 3, 2006, 02:00:03) Gas-pistoning is an interesting phenomenon seen at Kīlauea and some other basalticvolcanoes. It is caused by the accumulation of gas near the top of the lava column within a volcanic vent (Swanson and others, 1979).
Gas-Pistoning at Drainhole Vent in Pu'u 'O'o Crater (June 3, 2006)
Gas-pistoning is an interesting phenomenon seen at Kilauea and other volcanoes. It is caused by the accumulation of gas within, or the rise of a gas slug through, a column of lava. In either case, the gas pushes up the overlying lava (the "piston"). Eventually, the gas breaches the surface and escapes, sometimes as a forceful jet of fume and spatter.
Gas-pistoning is an interesting phenomenon seen at Kilauea and other volcanoes. It is caused by the accumulation of gas within, or the rise of a gas slug through, a column of lava. In either case, the gas pushes up the overlying lava (the "piston"). Eventually, the gas breaches the surface and escapes, sometimes as a forceful jet of fume and spatter.
Gas-Pistoning at Drainhole Vent in Pu'u 'O'o Crater (June 3, 2006)
Gas-pistoning is an interesting phenomenon seen at Kilauea and other volcanoes. It is caused by the accumulation of gas within, or the rise of a gas slug through, a column of lava. In either case, the gas pushes up the overlying lava (the "piston"). Eventually, the gas breaches the surface and escapes, sometimes as a forceful jet of fume and spatter.
Gas-pistoning is an interesting phenomenon seen at Kilauea and other volcanoes. It is caused by the accumulation of gas within, or the rise of a gas slug through, a column of lava. In either case, the gas pushes up the overlying lava (the "piston"). Eventually, the gas breaches the surface and escapes, sometimes as a forceful jet of fume and spatter.
Gas-Pistoning at Drainhole Vent in Pu'u 'O'o Crater (June 2-3, 2006)
Gas-pistoning is an interesting phenomenon seen at Kilauea and other volcanoes. It is caused by the accumulation of gas within, or the rise of a gas slug through, a column of lava. In either case, the gas pushes up the overlying lava (the "piston"). Eventually, the gas breaches the surface and escapes, sometimes as a forceful jet of fume and spatter.
Gas-pistoning is an interesting phenomenon seen at Kilauea and other volcanoes. It is caused by the accumulation of gas within, or the rise of a gas slug through, a column of lava. In either case, the gas pushes up the overlying lava (the "piston"). Eventually, the gas breaches the surface and escapes, sometimes as a forceful jet of fume and spatter.
Mount St. Helens: Instrumentation and Dome Growth, April-May 2006
The first priority of any eruption is to assess current status and what might happen next. To accomplish this, Mount St. Helens became one of most heavily monitored volcanoes. At the start of the 2004–08 eruption, 13 permanent seismic stations operated within about 12 miles of Mount St. Helens.
The first priority of any eruption is to assess current status and what might happen next. To accomplish this, Mount St. Helens became one of most heavily monitored volcanoes. At the start of the 2004–08 eruption, 13 permanent seismic stations operated within about 12 miles of Mount St. Helens.
Mount St. Helens: Instrumentation and Dome Growth, May-Sept 2006
Throughout the eruption, scientists installed monitoring stations to track volcanic activity, deployed temporary monitoring ""spiders"", monitored the temperature of lava spines and created time-lapse of dome growth. During the 3+ years of the eruption, lava piled up to form a new dome 460 m (1,500 ft) high.
Throughout the eruption, scientists installed monitoring stations to track volcanic activity, deployed temporary monitoring ""spiders"", monitored the temperature of lava spines and created time-lapse of dome growth. During the 3+ years of the eruption, lava piled up to form a new dome 460 m (1,500 ft) high.
Lava Tube Bubble Bursts on the East Lae‘apuki Lava Delta
(May 29, 2006, 10:45:46 to 19:30:49) The interaction of sea water and lava creates a volatile situation (Mattox and Mangan, 1997). When this happens inside the confined space of a lava tube, or a narrow, water-filled crack, the results can be impressive.
(May 29, 2006, 10:45:46 to 19:30:49) The interaction of sea water and lava creates a volatile situation (Mattox and Mangan, 1997). When this happens inside the confined space of a lava tube, or a narrow, water-filled crack, the results can be impressive.
Bubble Bursts at East Lae'apuki Ocean Entry (May 29, 2006)
The interaction of sea water and lava creates a volatile situation. When this happens inside the confined space of a lava tube, or a narrow, water-filled crack, the results can be impressive. In this video, which was made from time-lapse images cropped to focus on the activity, bursting lava bubbles put on quite a show for several hours.
The interaction of sea water and lava creates a volatile situation. When this happens inside the confined space of a lava tube, or a narrow, water-filled crack, the results can be impressive. In this video, which was made from time-lapse images cropped to focus on the activity, bursting lava bubbles put on quite a show for several hours.
PubTalk 5/2006 — What Lies Beneath?
Concealed sedimentary basins and hidden oil under Silicon Valley
By Richard G. Stanley, Geologist
Concealed sedimentary basins and hidden oil under Silicon Valley
By Richard G. Stanley, Geologist
PubTalk 4/2006 — California's Greatest Fault
How historical data from 1906 have shed light on the San Andreas Fault
By Carol S. Prentice, Geologist
How historical data from 1906 have shed light on the San Andreas Fault
By Carol S. Prentice, Geologist
Earthquakes - Shock Waves
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.
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.
Shock Waves: 100 Years After the 1906 Earthquake
Shock Waves is an Emmy Award nominated USGS television program that aired on San Francisco's CBS-5 in April, 2006 during the week of the 100 year anniversary of the Great San Francisco Earthquake. The program is hosted by Dana King and was produced and directed by Stephen M. Wessells.
Shock Waves is an Emmy Award nominated USGS television program that aired on San Francisco's CBS-5 in April, 2006 during the week of the 100 year anniversary of the Great San Francisco Earthquake. The program is hosted by Dana King and was produced and directed by Stephen M. Wessells.
PubTalk 3/2006 — The Great 1906 Earthquake
Lessons learned, lessons forgotten, and future directions in earthquake science
By Mary Lou Zoback, Seismologist (and Chair of the Steering Committee, 1906 Earthquake Centennial Alliance)
Lessons learned, lessons forgotten, and future directions in earthquake science
By Mary Lou Zoback, Seismologist (and Chair of the Steering Committee, 1906 Earthquake Centennial Alliance)
Shatter Ring on the PKK Lava Tube
(March 20, 2006, 11:30:10 to March 22, 2006, 07:00:16) The flow field feature seen here in profile is a shatter ring.
(March 20, 2006, 11:30:10 to March 22, 2006, 07:00:16) The flow field feature seen here in profile is a shatter ring.
Shatter Ring on PKK Lava Tube (March 20-22, 2006)
The flow field feature seen here is called a shatter ring. Shatter rings are circular to elliptical volcanic features, typically tens of meters (yards) in diameter, which form over active lava tubes. They are typified by an upraised rim of blocky rubble and a central depression.
The flow field feature seen here is called a shatter ring. Shatter rings are circular to elliptical volcanic features, typically tens of meters (yards) in diameter, which form over active lava tubes. They are typified by an upraised rim of blocky rubble and a central depression.
PubTalk 2/2006 — Science and Natural Resources along La Frontera
By Floyd Gray, Geologist
Lava Fountaining from MLK Vent (February 9-10, 2005)
On February 9, 2005, an eruptive surge at Pu'u 'O'o resulted in episodic spattering and fountaining from the MLK vent, on the southwestern flank of the Pu'u 'O'o cone. The main cone active during this event was 6-7 meters (20-23 feet) high. This suggests that fountain heights reached about 10 meters (33 feet).
On February 9, 2005, an eruptive surge at Pu'u 'O'o resulted in episodic spattering and fountaining from the MLK vent, on the southwestern flank of the Pu'u 'O'o cone. The main cone active during this event was 6-7 meters (20-23 feet) high. This suggests that fountain heights reached about 10 meters (33 feet).
PubTalk 1/2006 — Serving California's Needs
HOW THE CALIFORNIA GEOLOGICAL SURVEY IDENTIFIES AND MAPS NATURAL HAZARDS, PROMOTES THE STATE'S ECONOMY, AND PROTECTS PUBLIC HEALTH AND SAFETY
By George J. Saucedo and Keith L. Knudson, Geologists
HOW THE CALIFORNIA GEOLOGICAL SURVEY IDENTIFIES AND MAPS NATURAL HAZARDS, PROMOTES THE STATE'S ECONOMY, AND PROTECTS PUBLIC HEALTH AND SAFETY
By George J. Saucedo and Keith L. Knudson, Geologists
PubTalk 12/2005 — Frozen in Time
How Ice Cores Are Revealing the Composition and Temperature of Earth's Atmosphere During the Past Million Years
by Todd Hinkley, Geologist
How Ice Cores Are Revealing the Composition and Temperature of Earth's Atmosphere During the Past Million Years
by Todd Hinkley, Geologist
Lava Delta Collapse at East Lae‘apuki
At 11:10 in the morning on November 28, 2005, the lava delta at the East Lae‘apuki ocean entry, on Hawai‘i's southeastern coast, began to collapse into the ocean. This was not a catastrophic failure of the 13.8-hectare delta, but instead occurred by piecemeal calving of the front of the delta over a period of just less than 5 hours.
At 11:10 in the morning on November 28, 2005, the lava delta at the East Lae‘apuki ocean entry, on Hawai‘i's southeastern coast, began to collapse into the ocean. This was not a catastrophic failure of the 13.8-hectare delta, but instead occurred by piecemeal calving of the front of the delta over a period of just less than 5 hours.