Images

The Uwīkahuna WT (water-tube) instrument is still measured today, providing one of the longest records of deformation for any volcano. The tiltmeter is read by looking into the portal on each pot and adjusting the sight until two pins appear to touch.

Coconut grove and campground on the southern shoreline of Kīlauea Volcano at Halapē before 1975 magnitude 7.7 earthquake. Halapē was a popular hiking destination in Hawai‘i Volcanoes National Park.

Recent light detection and ranging (lidar) imagery has allowed us to identify and map a large number of previously unrecognized landslides, or slides, in heavily forested terrain in the western Columbia Gorge, Skamania County, Washington, and it has revealed that the few previously recognized areas of instability are actually composites of multiple smaller landslide

Shaded relief map of Kīlauea Volcano's summit with caldera bounding faults delineated.

Seismic hazard across the State of Hawaii, with high seismic hazards depicted with warm colors (red-orange) and relatively low seismic hazards depicted with cool colors (green). Engineers use these types of maps to prescribe building codes known as Seismic Design Codes (SDC) and create earthquake resistant structures.

Vectors indicate Pacific Plate motion relative to presumed fixed mantle hot spot in millimeters per year. Gray lines indicate fracture zones. Isochrons along the Emperor Seamounts chain show the age of volcanism in millions of years. Ocean floor ages from imagery available on EarthByte.

Mount Adams elevation is 3,745 m (12, 286 ft). Mount St. Helens was the smallest of five major volcanic peaks in Washington State.

Mount Rainier 2014 Teacher Workshop

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.

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.

Streamflow measurement and water sampling at Paradise Creek are part of the regular measurements taken during hydrothermal monitoring campaigns at Mount Rainier, Washington.

Village of Belalcázar along the Páez River in Colombia. Photograph taken in 2006 - note river bank vegetation and soccer pitch is restored in 12 years after 1994 lahar.

Scientists monitor data in the California Volcano Observatory operations room, Menlo Park, California.

Graph shows thickness of ash (and larger-sized particles within 20-40 km) that fell to the ground downwind of Mount St. Helens during the eruption on May 18, 1980. The volcano ejected a minimum of 1.1 km3 of uncompacted tephra, which is equivalent to 0.20-0.25 km3 of magma or solid rock.

Heavy ashfall (20-30 mm) from Tungurahua, Ecuador, 2006.

Dusting of Klyuchevskoy ash on camera bag, 2006.

USGS-CVO building sign, Vancouver, Washington.

Geologic Map of Three Sisters Volcanic Cluster, Cascade Range, Oregon

South Sister northwest flank. Right shoulder at skyline is thin sheet of mafic material from 22ka summit eruption. Red cinders in headwall cirques are layered with dipping lava flows.

Geologic Map of the Washougal Quadrangle, Clark County, Washington and Multnomah County, Oregon (Scientific Investigation Map 3257).