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PubTalk — Sonoran Desert
PubTalk — Sonoran Desert
PubTalk — Sonoran Desert

Fragile Land of Extremes
A video presentation and discussion

Research Ecologists Cecil Schwalbe and Todd Esque will introduce the 2003 USGS video Sonoran Desert: Fragile Land of Extremes, present an update on recent research, and answer your questions. 

Fragile Land of Extremes
A video presentation and discussion

Research Ecologists Cecil Schwalbe and Todd Esque will introduce the 2003 USGS video Sonoran Desert: Fragile Land of Extremes, present an update on recent research, and answer your questions. 

Mount St. Helens: Instrumentation and Dome Growth, April - July 2005.
Mount St. Helens: Instrumentation and Dome Growth, April - July 2005.
Mount St. Helens: Instrumentation and Dome Growth, April - July 2005.

Lava spines continue to emerge onto the crater floor of Mount St. Helens in 2005. By April 2005, spine 4 is broken and pushed away by spine 5.  The nearly vertical spine 5 has a smooth, gouge-covered surface, growing at an average rate of 4.3 meters per day.

Lava spines continue to emerge onto the crater floor of Mount St. Helens in 2005. By April 2005, spine 4 is broken and pushed away by spine 5.  The nearly vertical spine 5 has a smooth, gouge-covered surface, growing at an average rate of 4.3 meters per day.

PubTalk — Earthquakes at the USGS
PubTalk — Earthquakes at the USGS
PubTalk — Earthquakes at the USGS

Blowing the Lid off Seismic Science for 40 Years

Ross Stein, representing the USGS Earthquake Hazards Team 

PubTalk — Commotions in the Oceans
PubTalk — Commotions in the Oceans
PubTalk — Commotions in the Oceans

USGS Shipboard Research Sparked Scientific Advances

By William R. Normark, and

David W. Scholl, Marine Geologists

USGS Shipboard Research Sparked Scientific Advances

By William R. Normark, and

David W. Scholl, Marine Geologists

Mount St. Helens: Instrumentation and Dome Growth, Feb - Mar 15, 2005
Mount St. Helens: Instrumentation and Dome Growth, Feb - Mar 15, 2005
Mount St. Helens: Instrumentation and Dome Growth, Feb - Mar 15, 2005

Growth and disintegration of lava spines continued at Mount St. Helens through the first 8 months of 2005. Rather than building a single dome-shaped structure, the new dome grew initially as a series of recumbent, smoothly surfaced spines that extruded to lengths of almost 500 m.

Growth and disintegration of lava spines continued at Mount St. Helens through the first 8 months of 2005. Rather than building a single dome-shaped structure, the new dome grew initially as a series of recumbent, smoothly surfaced spines that extruded to lengths of almost 500 m.

PubTalk — When Rocks Fall and the Land Slides
PubTalk — When Rocks Fall and the Land Slides
PubTalk — When Rocks Fall and the Land Slides

Hear why California makes an ideal environment for landslides North face

By Gerald F. Wieczorek, Geological Engineer, and

Raymond C. Wilson, Landslide Geologist

Hear why California makes an ideal environment for landslides North face

By Gerald F. Wieczorek, Geological Engineer, and

Raymond C. Wilson, Landslide Geologist

Mount St. Helens: Instrumentation and Dome Growth, January 2005
Mount St. Helens: Instrumentation and Dome Growth, January 2005
Mount St. Helens: Instrumentation and Dome Growth, January 2005

Within the crater of Mount St. Helens, the 2004–2008 lava dome grew by continuous extrusion of degassed lava spines. To track growth and anticipate what the volcano might do next, scientists installed monitoring equipment, including a camera and gas sensing instruments, and made helicopter overflights to collect the temperature (FLIR) of the growing dome.

Within the crater of Mount St. Helens, the 2004–2008 lava dome grew by continuous extrusion of degassed lava spines. To track growth and anticipate what the volcano might do next, scientists installed monitoring equipment, including a camera and gas sensing instruments, and made helicopter overflights to collect the temperature (FLIR) of the growing dome.

Mount St. Helens eruption highlights: September 2004 - May 2005
Mount St. Helens eruption highlights: September 2004 - May 2005
Mount St. Helens eruption highlights: September 2004 - May 2005

Compilation video of significant events from the dome-building eruption at Mount St. Helens, from October 1, 2004 to March 15, 2005, including steam and ash eruptions, growth of lava spines, helicopter deployment of monitoring equipment, collection of lava samples, and FLIR thermal imaging of rock collapse on lava dome.

Compilation video of significant events from the dome-building eruption at Mount St. Helens, from October 1, 2004 to March 15, 2005, including steam and ash eruptions, growth of lava spines, helicopter deployment of monitoring equipment, collection of lava samples, and FLIR thermal imaging of rock collapse on lava dome.

PubTalk 12/2004 — Probing Volcanoes

Advances in Understanding and Coping with their Hazards

by Robert L. Christiansen and Robert I. Tilling, Volcanologists

Advances in Understanding and Coping with their Hazards

by Robert L. Christiansen and Robert I. Tilling, Volcanologists

Mount St. Helens: Instrumentation and Dome Growth, Nov-Dec 2004
Mount St. Helens: Instrumentation and Dome Growth, Nov-Dec 2004
Mount St. Helens: Instrumentation and Dome Growth, Nov-Dec 2004

By late October 2004, a whaleback-shaped extrusion of solid lava (called a spine) emerged from Mount St. Helens' crater floor. The 2004–2008 lava dome grew by continuous extrusion of degassed lava spines that had mostly solidified at less than 1 km (0.62 mi) beneath the surface.

By late October 2004, a whaleback-shaped extrusion of solid lava (called a spine) emerged from Mount St. Helens' crater floor. The 2004–2008 lava dome grew by continuous extrusion of degassed lava spines that had mostly solidified at less than 1 km (0.62 mi) beneath the surface.

PubTalk 11/2004 — From Plane Tables to Pixels
PubTalk 11/2004 — From Plane Tables to Pixels
PubTalk 11/2004 — From Plane Tables to Pixels

The Revolution in Mapping at the U.S. Geological Survey

by Susan P. Benjamin, Research Geographer

Mount St. Helens: Instrumentation and Dome Growth, Oct-Nov, 2004
Mount St. Helens: Instrumentation and Dome Growth, Oct-Nov, 2004
Mount St. Helens: Instrumentation and Dome Growth, Oct-Nov, 2004

On October 11, 2004, spines of solid, but still hot, lava punctured the surface of the deformed glacier, initiating a new dome-building phase of activity in the crater of Mount St. Helens. By late October, a larger whaleback-shaped extrusion of solid lava (called a spine) emerged from the crater floor.

On October 11, 2004, spines of solid, but still hot, lava punctured the surface of the deformed glacier, initiating a new dome-building phase of activity in the crater of Mount St. Helens. By late October, a larger whaleback-shaped extrusion of solid lava (called a spine) emerged from the crater floor.

Mount St. Helens: Steam, Ash Emissions and Dome Growth, October 2004
Mount St. Helens: Steam, Ash Emissions and Dome Growth, October 2004
Mount St. Helens: Steam, Ash Emissions and Dome Growth, October 2004

After two weeks of increasing seismicity, Mount St. Helens began erupting on October 1, 2004. The first of several explosions shot a plume of volcanic ash and gases into the atmosphere. Four additional steam and ash explosions occurred through October 5, and three produced noticeable fallout of fine ash downwind.

After two weeks of increasing seismicity, Mount St. Helens began erupting on October 1, 2004. The first of several explosions shot a plume of volcanic ash and gases into the atmosphere. Four additional steam and ash explosions occurred through October 5, and three produced noticeable fallout of fine ash downwind.

Mount St. Helens: Instrumentation and Dome Growth, Oct 2004-Sept 2005
Mount St. Helens: Instrumentation and Dome Growth, Oct 2004-Sept 2005
Mount St. Helens: Instrumentation and Dome Growth, Oct 2004-Sept 2005

Following unrest that began on September 23, 2004 and the steam and ash eruptions in early October, extrusion of solid magma typified the 2004-2008 eruption at Mount St. Helens. The magma is unusually gas poor and crystal rich.  Several meters of pulverized, variably sintered rock commonly coat the emergent lava spines, lending them a smooth appearance.

Following unrest that began on September 23, 2004 and the steam and ash eruptions in early October, extrusion of solid magma typified the 2004-2008 eruption at Mount St. Helens. The magma is unusually gas poor and crystal rich.  Several meters of pulverized, variably sintered rock commonly coat the emergent lava spines, lending them a smooth appearance.

PubTalk 10/2004 — Hot Oil, Frozen Ground, and Earthquakes
PubTalk 10/2004 — Hot Oil, Frozen Ground, and Earthquakes
PubTalk 10/2004 — Hot Oil, Frozen Ground, and Earthquakes

The Trans-Alaska Pipeline story-- so far, so good!

by George Gryc, Arthur Lachenbruch, and Robert Page, Scientists Emeriti

PubTalk 9/2004 — The Winemaker's Dance
PubTalk 9/2004 — The Winemaker's Dance
PubTalk 9/2004 — The Winemaker's Dance

Connecting Geology and Wine in Napa Valley

by David G. Howell, Geologist Emeritus

PubTalk 8/2004 — Precipice of Survival
PubTalk 8/2004 — Precipice of Survival
PubTalk 8/2004 — Precipice of Survival

What is the Future of the Southern Sea Otter?

Featuring the new award-winning USGS video Precipice of Survival. The Southern Sea Otter by Stephen Wessells, introduced and discussed by sea otter researchers including Alisha H. Kage and M. Tim Tinker, Research Biologists 

What is the Future of the Southern Sea Otter?

Featuring the new award-winning USGS video Precipice of Survival. The Southern Sea Otter by Stephen Wessells, introduced and discussed by sea otter researchers including Alisha H. Kage and M. Tim Tinker, Research Biologists 

PubTalk 7/2004 — Secrets in Stone
PubTalk 7/2004 — Secrets in Stone
PubTalk 7/2004 — Secrets in Stone

The Role of Paleomagnetism in the Evolution of Plate Tectonic Theory Video Presentation

Presentation of the award-winning USGS video "Secrets in Stone" (35 minutes), introduced by Jack Hillhouse, Research Geophysicist, and followed by a tour of the USGS Paleomagnetics Laboratory

The Role of Paleomagnetism in the Evolution of Plate Tectonic Theory Video Presentation

Presentation of the award-winning USGS video "Secrets in Stone" (35 minutes), introduced by Jack Hillhouse, Research Geophysicist, and followed by a tour of the USGS Paleomagnetics Laboratory

PubTalk 5/2004 — Delta Revival: Restoration of a California Ecosystem
PubTalk 5/2004 — Delta Revival: Restoration of a California Ecosystem
PubTalk 5/2004 — Delta Revival: Restoration of a California Ecosystem

Video presentation and discussion

Ecologist Jim Cloern will introduce the video Delta Revival, produced jointly by the USGS and the CALFED Bay-Delta Authority. 

USGS Scientists wil answer your questions about this documentary, which shows:

Video presentation and discussion

Ecologist Jim Cloern will introduce the video Delta Revival, produced jointly by the USGS and the CALFED Bay-Delta Authority. 

USGS Scientists wil answer your questions about this documentary, which shows:

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