Images

CVO Open House

Mount Rainier Teacher Workshop Participants 2011

Quaternary volcanic rocks are shown in black, and main centers are labeled. Chilliwack batholith and Pemberton belt represent Oligocene– Miocene arc 20–50 km inboard of Quaternary Garibaldi arc. Dashed line surrounding Puget Lowland shows maximum extent of Puget lobe of Cordilleran Ice Sheet during the last glaciation.

This notice was posted at campgrounds around Baker Lake by the US Forest Service in June 1975. Normally, Baker Reservoir approaches capacity during mid-summer. At most other times, reservoir levels are low enough to impound lahars the size of those that occurred in 1843.

USGS-CVO building sign, Vancouver, Washington.

Seismogram signal examples from volcanic earthquakes: volcano tectonic (VT) Low Frequency (LF)/Deep Long-Period (DLP), hybrid (mix of VT and LF), very low frequency (VLF), and Tremor.

Geologic Hazards at Volcanoes. To download the full poster click here.

Crater Lake, Oregon simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.

Geologic Hazards at Volcanoes (click for larger version)

Block diagram showing subduction of the Juan de Fuca Plate beneath the North American Plate along the Cascadia Trench, which is the western edge of the Cascadia subduction zone. Oceanic crust forms by eruptions along the Juan de Fuca Ridge.

Mount Jefferson viewed from Highway 26, Oregon.

Family Emergency Preparedness Plan

Map showing locations of airports impacted by volcanic activity. From 1980 through 2006, an average of five airports per year have been affected by volcanic activity

Flow chart illustrating the many variables influencing ash-induced insulator flashover.

For Volcano Preparedness Month in Washington State, Carolyn Driedger (USGS-Cascades Volcano Observatory) and Zane Gibson (Fire Chief, Orting Valley Fire and Rescue) share the story of their visit to Colombia's Nevado del Ruiz volcano and valuable lessons learned for resident near Mount Rainier.

White Salmon River (Washington) at USGS gauge site, 2.3 km downstream of Condit Dam, looking downstream: (a) 53 min before breaching; (b) 20 min after breaching, at discharge peak; (c) 76 min after breaching, at peak sediment concentration, with high water line evident; (d) ~2.5 h after breaching, discharge has returned to background and sediment concentration is f

Early on the morning of May 18, 1980, the landslide swept into the upper North Fork Toutle River valley and came to rest within about 22 km of the volcano. The landslide deposit, however, was saturated with water, and contained snow and ice blocks from the volcano's former glaciers.

Lahar devastation after the eruption of Mount Pinatubo, Philippines.

Eruption of Soufriere Hills, Montserrat, November 2009

Lava-flow hazard zone map, Hawai‘i Island

Lava-flow hazard zones map, Island of Hawai‘i. See Full Map for complete legend.