Volcano Hazards Program Office

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Image: Mt. Spurr, Crater Peak
August 18, 1992

Mt. Spurr, Crater Peak

Roiling eruption column rising from Crater Peak vent of Mt. Spurr volcano. View from the south.

Image: Finding the Fumarole Vent
August 11, 1992

Finding the Fumarole Vent

USGS hydrologist Michael Sorey tries to locate the steam vent at a fumarole in the Bumpass Hell area in Lassen Volcanic National Park.

image related to volcanoes. See description
January 1, 1992

Steamboat Geyser in the steam-phase of an eruption on June 4, 2018, Norris Geyse

Steamboat Geyser in the steam-phase of an eruption on June 4, 2018, Norris Geyser Basin, Yellowstone National Park. Photo by Jamie Farrell (University of Utah).

Color graphic of geologic map
December 31, 1991

Portion of the Geologic map of the lower East Rift Zone of Kīlauea

Portion of the Geologic map of the lower East Rift Zone of Kīlauea Volcano, Hawai‘i by Moore and Trusdell (1991), showing the southeastern part of the Leilani Estates subdivision. Some geologic units depicted here are now buried by 2018 lava flows; a red star marks the location of fissure 8. The large pink area depicts lava flows and vents from an eruption in CE 1790.

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Image: Valley of Ten Thousand Smokes, Alaska
June 9, 1991

Valley of Ten Thousand Smokes, Alaska

View southeast from Overlook Cabin looking over the Valley of Ten Thousand Smokes. The pyroclastic and ash deposits that fill the valley remain nearly vegetation-free more than 100 years after the 1912 Novarupta-Katmai eruption.

Image: Cinder Cones on Mauna Kea
February 16, 1991

Cinder Cones on Mauna Kea

Cinder cones at the summit of Mauna Kea. Mauna Kea is a dormant shield volcano on the north end of Hawaii Island. Astronomical observatories in the foreground.

Cinder cones (otherwise known as scoria cones) are the most common type of volcano on Earth. They’re also one of the smallest. They can often be found growing on larger volcanoes, in which case they’re dubbed

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Image: Sampling a Fumarole
July 31, 1990

Sampling a Fumarole

USGS geochemist Cathy Janik (left) and Iceland Geosurvey chemist Jón Örn Bjarnason (right) collect a gas sample from a fumarole in Lassen Volcanic National Park.

Lava flows around Walter's Drive Inn sign in Kalapana, Kīlauea Volc...
June 6, 1990

Lava flows around Walter's Drive Inn sign in Kalapana, Kīlauea

Lava rises around Walter's Drive Inn sign. Concrete walls of the store and roof of the post office are in the background.

Lava entering ocean at Kalapana Gardens subdivision, Kīlauea Volcan...
June 3, 1990

Lava entering ocean at Kalapana Gardens subdivision, Kīlauea

Lava entering ocean at Kalapana Gardens subdivision, Kīlauea Volcano, Hawai‘i

Kalapana Gardens subdivision inundated by pHOEHOE flows, Kīlauea Vo...
May 31, 1990

Kalapana Gardens subdivision inundated by Pāhoehoe, Kīlauea

Individual pāhoehoe flow fronts were typically only 10-20 cm thick as they moved through Kalapana. However, the thin leading edges of the flows quickly crusted over and stagnated. As lava continued to push beneath the crust, the cooled surface was lifted up until eventually lava again broke out of the sides and front of the inflated flows. In this way, many of the

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Kalapana Gardens subdivision inundated by pāhoehoe flows, Kīlauea V...
May 16, 1990

Kalapana Gardens subdivision inundated by pāhoehoe, Kīlauea

Kalapana Gardens subdivision inundated by pāhoehoe flows, Kīlauea Volcano, Hawai‘i

Lava enters Harry K. Brown Park in Kalapana, Kīlauea Volcano, Hawai...
May 2, 1990

Lava enters Harry K. Brown Park in Kalapana, Kīlauea, Hawai‘i

Harry K. Brown Park was originally called "Wai'akolea Park." It was renamed "Harry Ka'ina Brown Memorial Park" in 1953 after Brown, a county auditor, whose ancestral home was in Kalapana. Thick smoke is from burning asphalt.