Pinnacles formed in Mazama pyroclastic flow deposit as erosion revealed fumarole chimneys that formed shortly after 7,700 ka eruption released gas, Crater Lake.
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Pinnacles formed in Mazama pyroclastic flow deposit as erosion reve...
Pinnacles formed in Mazama pyroclastic flow deposit as erosion revealed fumarole chimneys that formed shortly after 7,700 ka eruption released gas, Crater Lake.
Crater Lake panorama seen from the lake's southern shore. Wizard Is...
Crater Lake panorama seen from the lake's southern shore. Wizard Island is cone in western portion of lake. Oregon
Crater Lake panorama seen from the lake's southern shore. Wizard Island is cone in western portion of lake. Oregon
Mauna Loa rumbled and stretched as it awakened from a 25-year slumber
Lava fountains up to 20 m (65 ft) high erupted from fissures on the north flank of Mauna Loa early Sunday morning, July 6, 1975. USGS photo.
Lava fountains up to 20 m (65 ft) high erupted from fissures on the north flank of Mauna Loa early Sunday morning, July 6, 1975. USGS photo.
Mauna Loa rumbled and stretched as it awakened from a 25-year slumber
On July 6, 1975, eruptive fissures opened along Mauna Loa
On July 6, 1975, eruptive fissures opened along Mauna Loa
Halema‘uma‘u's fickle lava pond has been unusually steady recently
The lava pond resides deep within the vent cavity in Halema‘uma‘u, at a depth of about 180 m (200 yards). Photograph taken from the former Halema‘uma‘u Overlook on June 20, 2010.
The lava pond resides deep within the vent cavity in Halema‘uma‘u, at a depth of about 180 m (200 yards). Photograph taken from the former Halema‘uma‘u Overlook on June 20, 2010.
Medano Creek Wildfire
Medano Creek after wildfire.
Medano Creek after wildfire.
Native Fish and Wildfire
Colorado-native Rio Grande Cuttroat Trout salvaged after Medano Creek wildfire, Great Sand Dunes National Park, Colorado.
Colorado-native Rio Grande Cuttroat Trout salvaged after Medano Creek wildfire, Great Sand Dunes National Park, Colorado.
TEB rootless shield, spattering in Pu’u ‘Ō’ō
A small rootless shield is forming on the upper flow field over the breakout point of the Quarry flow, the flow that has been feeding the ocean entry for the past several weeks. The shield is approximately 10-15 m (yards) high. This photo was taken looking SSW, with the upslope direction to the right.
A small rootless shield is forming on the upper flow field over the breakout point of the Quarry flow, the flow that has been feeding the ocean entry for the past several weeks. The shield is approximately 10-15 m (yards) high. This photo was taken looking SSW, with the upslope direction to the right.
Honolulu Geomagnetic Observatory
Pacific Tsunami Warning Center building.
Pacific Tsunami Warning Center building.
Seismic station VALT in Mount St. Helens crater, view toward the south
Seismic station VALT in Mount St. Helens crater, view toward the south.
Seismic station VALT in Mount St. Helens crater, view toward the south.
New Dark Lava in Pu’u ‘Ō’ō crater
The recent activity within Pu`u `Ō `ō crater quieted over the past several days. This photo shows the new, dark-colored lava that covered the crater floor. A new gas vent on the east wall of the crater (top left) also appeared over the couple of weeks.
The recent activity within Pu`u `Ō `ō crater quieted over the past several days. This photo shows the new, dark-colored lava that covered the crater floor. A new gas vent on the east wall of the crater (top left) also appeared over the couple of weeks.
New Gas Vent of Pu’u ‘Ō’ō
The new gas vent on the east wall of Pu`u `Ō `ō crater opening up next to an older vent (the dark opening to the right of the new gas vent) that sealed shut in the past few months. The new vent has been incandescent at night for the past few days.
The new gas vent on the east wall of Pu`u `Ō `ō crater opening up next to an older vent (the dark opening to the right of the new gas vent) that sealed shut in the past few months. The new vent has been incandescent at night for the past few days.
Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).
Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).
Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).
Smoke From Schultz Pass Forest Fire, Flagstaff, Arizona, June 20, 2010
Panorama (180 degree field of view) photograph of smoke rising from the Schultz Pass fire near Flagstaff, Arizona, at 1:34 p.m. on its day of ignition, June 20, 2010. Over the following 10 days, the fire burned an estimated 15,075 acres, or more than 23 square miles of northern Arizona forest, and cost more than $8.6 million to fight.
Panorama (180 degree field of view) photograph of smoke rising from the Schultz Pass fire near Flagstaff, Arizona, at 1:34 p.m. on its day of ignition, June 20, 2010. Over the following 10 days, the fire burned an estimated 15,075 acres, or more than 23 square miles of northern Arizona forest, and cost more than $8.6 million to fight.
Temperature data is collected from this data logger that is placed ...
Data are collected every two minutes and sent by radio once per day to a server where values are plotted and released to the public internet.
Data are collected every two minutes and sent by radio once per day to a server where values are plotted and released to the public internet.
Aerial View of Pu’u ‘Ō’ō Crater
View of the lava pond in Pu`u `Ō `ō crater, taken from the southwest rim of the cone. The pond is approximately 75 meters below the visible section of the rim in the upper edge of the photograph.
View of the lava pond in Pu`u `Ō `ō crater, taken from the southwest rim of the cone. The pond is approximately 75 meters below the visible section of the rim in the upper edge of the photograph.
Kīlauea plume: now you see it, now you don't
Kīlauea volcano's summit eruption plume as viewed from the southeast flank of Mauna Loa on 11/30/2009 (top) and 12/20/2009 (bottom). The eruption plume's visible appearance is a complex function of physical eruptive vent conditions, meteorology and atmosp
Kīlauea volcano's summit eruption plume as viewed from the southeast flank of Mauna Loa on 11/30/2009 (top) and 12/20/2009 (bottom). The eruption plume's visible appearance is a complex function of physical eruptive vent conditions, meteorology and atmosp
1940 was a momentous year for Mauna Loa - and for Thomas A. Jaggar
Lava fountains erupt from a fissure in the southwestern part of Moku`aeoweo, Mauna Loa's summit caldera, on April 11, 1940 (view looking to the south-southeast). Patches of white snow cling to the caldera walls as fluid pahoehoe lava flows spread across
Lava fountains erupt from a fissure in the southwestern part of Moku`aeoweo, Mauna Loa's summit caldera, on April 11, 1940 (view looking to the south-southeast). Patches of white snow cling to the caldera walls as fluid pahoehoe lava flows spread across
NetQuakes Offer More Community Partnering in USGS Seismic Monitoring
Records of the April 14, 2010, M3.8 earthquake, obtained from the Honomu, Hawai`i, NetQuakes seismograph. From top to bottom, the records show ground acceleration in east-west, north-south, and vertical directions. The records show roughly two minutes of
Records of the April 14, 2010, M3.8 earthquake, obtained from the Honomu, Hawai`i, NetQuakes seismograph. From top to bottom, the records show ground acceleration in east-west, north-south, and vertical directions. The records show roughly two minutes of
NetQuakes Offer More Community Partnering in USGS Seismic Monitoring
A NetQuakes digital seismograph with WiFi antenna and power cord attached (pencil shows scale).
A NetQuakes digital seismograph with WiFi antenna and power cord attached (pencil shows scale).
Lava advances in "two steps forward, one step backward" style
Aerial view of Kīlauea Volcano's south flank shows new lava flows in Royal Gardens subdivision (center) and the coastal plain (bottom center). Blue smoke (center right) is from burning vegetation caused by active lava flows. The developing lava-tube sys
Aerial view of Kīlauea Volcano's south flank shows new lava flows in Royal Gardens subdivision (center) and the coastal plain (bottom center). Blue smoke (center right) is from burning vegetation caused by active lava flows. The developing lava-tube sys