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Images related to natural hazards.
Visual-thermal comparison of Pu‘u ‘Ō‘ō crater, looking west. In the normal photograph on the left, large portions of the crater floor are obscured by thick volcanic fume. The thermal image on the right can "see" through this fume, revealing features in the crater. Over the past month, a large portion of the crater floor has subsided.
Visual-thermal comparison of Pu‘u ‘Ō‘ō crater, looking west. In the normal photograph on the left, large portions of the crater floor are obscured by thick volcanic fume. The thermal image on the right can "see" through this fume, revealing features in the crater. Over the past month, a large portion of the crater floor has subsided.
A time-lapse camera on the rim of Pu‘u ‘Ō‘ō crater captured this image at dawn. The view is towards the southeast, and shows two glowing pits in the southern portion of the crater floor. Our overflight the next day showed that these pits are filled with small lava ponds.
A time-lapse camera on the rim of Pu‘u ‘Ō‘ō crater captured this image at dawn. The view is towards the southeast, and shows two glowing pits in the southern portion of the crater floor. Our overflight the next day showed that these pits are filled with small lava ponds.
Educators express enthusiasm for learning about Mount Rainier during a 2014 Cascades Volcano Observatory led teacher training.
Educators express enthusiasm for learning about Mount Rainier during a 2014 Cascades Volcano Observatory led teacher training.
Movie from a webcam positioned in the observation tower at the Hawaiian Volcano Observatory, next to Jaggar Museum, near the summit of Kīlauea, showing the July 23 explosive event. The movie images were captured at 2 frame/second, and the playback speed is 12 frames/second.
Movie from a webcam positioned in the observation tower at the Hawaiian Volcano Observatory, next to Jaggar Museum, near the summit of Kīlauea, showing the July 23 explosive event. The movie images were captured at 2 frame/second, and the playback speed is 12 frames/second.
Glowing skylights and points of fume just right of center mark the trace of a new lava tube on the northeast side of Pu‘u ‘Ō‘ō (upper right), Kīlauea Volcano. The tube began forming when lava broke out last week near the right side of the perched lava pond (circular, bowl-shaped feature left of center).
Glowing skylights and points of fume just right of center mark the trace of a new lava tube on the northeast side of Pu‘u ‘Ō‘ō (upper right), Kīlauea Volcano. The tube began forming when lava broke out last week near the right side of the perched lava pond (circular, bowl-shaped feature left of center).
Thermocouple temperature measurement of a lava breakout from the June 27th lava flow, Kīlauea Volcano, Hawai‘i. Bulk calculated temp 1100ºC (2012ºF) 3 km (1.9 mi) from Pu‘u ‘Ō‘ō source vent.
Thermocouple temperature measurement of a lava breakout from the June 27th lava flow, Kīlauea Volcano, Hawai‘i. Bulk calculated temp 1100ºC (2012ºF) 3 km (1.9 mi) from Pu‘u ‘Ō‘ō source vent.
Movie from a webcam positioned on the rim of Halema‘uma‘u, directly above the summit lava lake, showing the July 23 explosive event. The movie images were captured at 1 frame/second, and the playback speed is 12 frames/second.
Movie from a webcam positioned on the rim of Halema‘uma‘u, directly above the summit lava lake, showing the July 23 explosive event. The movie images were captured at 1 frame/second, and the playback speed is 12 frames/second.
Composite false-color Landsat-8 satellite image of Semisopochnoi Island on July 14, 2014, produced by combining the shortwave infrared, near infrared, and visible wavelength data. This color combination enhances the visualization of vegetation, exposed rocks, and snow (light blue).
Composite false-color Landsat-8 satellite image of Semisopochnoi Island on July 14, 2014, produced by combining the shortwave infrared, near infrared, and visible wavelength data. This color combination enhances the visualization of vegetation, exposed rocks, and snow (light blue).
The lava fragments ejected ranged in size from dust-sized particles up to spatter bombs about 70 cm (~30 inches) across. The larger clasts - the bombs - dotted the ground around the tourist overlook and webcam, giving the area a look reminiscent of a cow pasture.
The lava fragments ejected ranged in size from dust-sized particles up to spatter bombs about 70 cm (~30 inches) across. The larger clasts - the bombs - dotted the ground around the tourist overlook and webcam, giving the area a look reminiscent of a cow pasture.
Just after 10 AM this morning, the southeastern wall of the Overlook crater, in Halema‘uma‘u, collapsed and fell into the summit lava lake. This triggered a small explosive event that threw spatter bombs onto the rim of Halema‘uma‘u at the site of the tourist overlook, closed since 2008.
Just after 10 AM this morning, the southeastern wall of the Overlook crater, in Halema‘uma‘u, collapsed and fell into the summit lava lake. This triggered a small explosive event that threw spatter bombs onto the rim of Halema‘uma‘u at the site of the tourist overlook, closed since 2008.
The lava fragments ejected ranged in size from dust-sized particles up to spatter bombs about 70 cm (~30 inches) across. The larger clasts - the bombs - dotted the ground around the tourist overlook and webcam, giving the area a look reminiscent of a cow pasture.
The lava fragments ejected ranged in size from dust-sized particles up to spatter bombs about 70 cm (~30 inches) across. The larger clasts - the bombs - dotted the ground around the tourist overlook and webcam, giving the area a look reminiscent of a cow pasture.
As has been seen with almost all previous explosive events at Halema‘uma‘u since 2008, the spatter that was ejected was coated in dust and filled with small lithic fragments - clear evidence of the involvement of lithic wall rock. The knife is 12 cm (4.5 in) long.
As has been seen with almost all previous explosive events at Halema‘uma‘u since 2008, the spatter that was ejected was coated in dust and filled with small lithic fragments - clear evidence of the involvement of lithic wall rock. The knife is 12 cm (4.5 in) long.
Spatter landed on wooden fencing laying on the ground at the closed tourist overlook, igniting it in a few places.
Spatter landed on wooden fencing laying on the ground at the closed tourist overlook, igniting it in a few places.
USGS hydrologist Craig Brown installs a sensor pipe for the SWaTH Network.
USGS hydrologist Craig Brown installs a sensor pipe for the SWaTH Network.
Spatter landed on wooden fencing laying on the ground at the closed tourist overlook, igniting it in a few places.
Spatter landed on wooden fencing laying on the ground at the closed tourist overlook, igniting it in a few places.
Tim Sargent, a hydrology tech at the New England Water Science Center, is checking to make sure that the bracket he installed is level.
Tim Sargent, a hydrology tech at the New England Water Science Center, is checking to make sure that the bracket he installed is level.
The part of the Overlook crater wall that collapsed is evident in the center of this photo by its white color.
The part of the Overlook crater wall that collapsed is evident in the center of this photo by its white color.
The part of the Overlook crater wall that collapsed is evident in the center of this photo by its white color.
The part of the Overlook crater wall that collapsed is evident in the center of this photo by its white color.
Marinna Martini prepares to deploy a NIMBBLE from the R/V Connecticut south of Martha's Vineyard
Marinna Martini prepares to deploy a NIMBBLE from the R/V Connecticut south of Martha's Vineyard
Perhaps the most interesting feature in the new crater at Pu‘u ‘Ō‘ō is the pit formed on the southern side of the crater floor. There, a small lava pond roughly 10 m (~30 ft) across has been sporadically overflowing and sending lava toward the deeper central part of the crater. View is to the south.
Perhaps the most interesting feature in the new crater at Pu‘u ‘Ō‘ō is the pit formed on the southern side of the crater floor. There, a small lava pond roughly 10 m (~30 ft) across has been sporadically overflowing and sending lava toward the deeper central part of the crater. View is to the south.
The front of the "June 27 breakout" flow, seen here as the silvery lava at lower right, is about 2.0 km (~1.2 miles) northeast from its vent (as measured in a straight line), and surrounds what little remains of Pu‘u Kahauale‘a, a forested cone several hundred years old. View is toward the southwest, and Pu‘u ‘Ō‘ō is at upper right.
The front of the "June 27 breakout" flow, seen here as the silvery lava at lower right, is about 2.0 km (~1.2 miles) northeast from its vent (as measured in a straight line), and surrounds what little remains of Pu‘u Kahauale‘a, a forested cone several hundred years old. View is toward the southwest, and Pu‘u ‘Ō‘ō is at upper right.