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Volcano Hazard Program images.
Wes Thelen began his new job as HVO's Seismic Network Manager amidst a flurry of volcanic and seismic activity during Kīlauea Volcano's recent Kamoamoa fissure eruption, shown here on March 9, 2011.
Wes Thelen began his new job as HVO's Seismic Network Manager amidst a flurry of volcanic and seismic activity during Kīlauea Volcano's recent Kamoamoa fissure eruption, shown here on March 9, 2011.
Sunset Crater, a basaltic cinder cone in the San Francisco Volcanic Field, Arizona, erupted in 1085 A.D.
Sunset Crater, a basaltic cinder cone in the San Francisco Volcanic Field, Arizona, erupted in 1085 A.D.
HVO staff and volunteers map run-up elevations and inundation distances of tsunami waves that reached the shores around Hawai‘i Island following the magnitude-9.0 earthquake in Japan.
HVO staff and volunteers map run-up elevations and inundation distances of tsunami waves that reached the shores around Hawai‘i Island following the magnitude-9.0 earthquake in Japan.
An early morning view of the fountaining we encountered at the western fissure on Sunday, March 6, at 7:20 a.m. Particles were thrown up to 15 m (50 ft) high at this point and the intensity and height increased over the next two hours.
An early morning view of the fountaining we encountered at the western fissure on Sunday, March 6, at 7:20 a.m. Particles were thrown up to 15 m (50 ft) high at this point and the intensity and height increased over the next two hours.
The channelized flow from the western vent complex advanced significantly downslope through forest within the Hawai‘i Volcanoes National Park.
The channelized flow from the western vent complex advanced significantly downslope through forest within the Hawai‘i Volcanoes National Park.
The front of the advancing ‘A‘ā flow is about 4 m (13 ft) thick.
The front of the advancing ‘A‘ā flow is about 4 m (13 ft) thick.
View looking down onto the northeastern vent.
View looking down onto the northeastern vent.
Views into the Halema‘uma‘u vent have been largely obscured by fume over the past several days, and the only consistent views have been with a thermal camera, which can "see" through the fume. This thermal image was taken at a nearly vertical angle from a helicopter, in order to see the bottom of the extremely deep and narrow vent cavity.
Views into the Halema‘uma‘u vent have been largely obscured by fume over the past several days, and the only consistent views have been with a thermal camera, which can "see" through the fume. This thermal image was taken at a nearly vertical angle from a helicopter, in order to see the bottom of the extremely deep and narrow vent cavity.
Lava was reaching heights above the tree line.
Measuring the flow thickness from another section of the ‘A‘ā flow, using a 1 m (3.2 ft) orange pole for scale.
Measuring the flow thickness from another section of the ‘A‘ā flow, using a 1 m (3.2 ft) orange pole for scale.
Lava fountains from the northeastern vent of the Kamoamoa eruption. Though it is an impressive sight, the Pu‘u ‘Ō‘ō cone in the background, and several hundred meters higher, puts the current activity into perspective.
Lava fountains from the northeastern vent of the Kamoamoa eruption. Though it is an impressive sight, the Pu‘u ‘Ō‘ō cone in the background, and several hundred meters higher, puts the current activity into perspective.
Lava, erupting from the southwestern vent of the Kamoamoa eruption, fountains above the surrounding forest.
Lava, erupting from the southwestern vent of the Kamoamoa eruption, fountains above the surrounding forest.
A piece of spatter ejected on March 7, 2011. Handheld GPS for scale
A piece of spatter ejected on March 7, 2011. Handheld GPS for scale
Lava from the erupting fissure produced a large flow that is moving southeast through the adjacent forest.
Lava from the erupting fissure produced a large flow that is moving southeast through the adjacent forest.
Ground cracks between the east and west Kamoamoa fissure segments. Geologist is about 6 ft tall.
Ground cracks between the east and west Kamoamoa fissure segments. Geologist is about 6 ft tall.
The eastern vent complex of the Kamoamoa eruption was inactive today, but it continues to emit a thick gas plume.
The eastern vent complex of the Kamoamoa eruption was inactive today, but it continues to emit a thick gas plume.
The western vent complex continues to erupt, and had been doing so for about 30 hours as of the time of this photo. Lava erupting from the vent complex is flowing into a channel with levees.
The western vent complex continues to erupt, and had been doing so for about 30 hours as of the time of this photo. Lava erupting from the vent complex is flowing into a channel with levees.
By early this morning, the front of the ‘A‘ā flow fed from the western vent had intercepted the edge of the Mother's Day flow, which was emplaced in 2002-2004. The flow advanced about 2.9 km (1.8 miles) in 30 hours.
By early this morning, the front of the ‘A‘ā flow fed from the western vent had intercepted the edge of the Mother's Day flow, which was emplaced in 2002-2004. The flow advanced about 2.9 km (1.8 miles) in 30 hours.
With lava retreating deeper into the Halema‘uma‘u vent cavity over the past two days, the cavity walls have experienced more frequent collapses. At 2:23pm today, a collapse from the upper portion of the vent cavity produced a robust brown plume, but did not eject any large particles.
With lava retreating deeper into the Halema‘uma‘u vent cavity over the past two days, the cavity walls have experienced more frequent collapses. At 2:23pm today, a collapse from the upper portion of the vent cavity produced a robust brown plume, but did not eject any large particles.
This thermal image was taken from a helicopter above the active fountains at the west end of the fissure system. There were two adjacent fountaining areas, with one situated within a spatter cone and the other bursting through a perched lava pond. The fountains were feeding a channelized flow that can be seen in the upper right portion of the image.
This thermal image was taken from a helicopter above the active fountains at the west end of the fissure system. There were two adjacent fountaining areas, with one situated within a spatter cone and the other bursting through a perched lava pond. The fountains were feeding a channelized flow that can be seen in the upper right portion of the image.
This thermal image shows the channelized ‘A‘ā flow that was being fed by the fountains at the west end of the fissure system today. Near the end of the flow, the channel empties into the delta-like flow front.
This thermal image shows the channelized ‘A‘ā flow that was being fed by the fountains at the west end of the fissure system today. Near the end of the flow, the channel empties into the delta-like flow front.