September 28, 2015 Kīlauea
Scattered breakouts remain active northeast of Puʻu ʻŌʻō
The June 27th lava flow remains active with scattered breakouts northeast of Puʻu ʻŌʻō. The farthest active breakout today was about 6.5 km (4 miles) from Puʻu ʻŌʻō. This photograph shows activity along the northern flow boundary, where breakouts continue to burn vegetation.
Left: This view looks west towards Puʻu ʻŌʻō, which can be seen in the upper left. The most distant active breakouts today were located near the center of the photograph, at a spot roughly 6.5 km (4 miles) from Puʻu ʻŌʻō. Right: HVO geologists hike through thick fume and fog to reach the lava pond in the western portion of Puʻu ʻŌʻō crater.
No major changes in the lava lake at Halemaʻumaʻu Crater
Left: This wide view shows the lava lake active within the Overlook crater, which is set within the larger Halemaʻumaʻu Crater. There have been no major changes in the lake in recent weeks. This morning the lava lake was roughly 60 meters (200 feet) below the rim of the Overlook crater. The dark region surrounding the Overlook crater is lava that spilled out onto the floor of Halemaʻumaʻu Crater in April and May of this year, when the lake level was much higher. Right: A closer look at the lava lake in the Overlook crater.
September 11, 2015 Kīlauea
There has been no significant change on the flow field northeast of Puʻu ʻŌʻō, and some of the active flows continue to creep into the forest along the north edge of the flow field, as seen here, looking roughly northwest. Activity has been remarkably stable and consistent, with no overall advancement of the flows, for the last several weeks.
Left: View of Puʻu ʻŌʻō crater, looking northwest. The floor of the crater was paved in late August by lava that erupted from a vent at the northeast edge of the crater, which is the heavily fuming area to the right. There are also vents at the southeast edge of the crater (note the incandescent vent just left of center) and at the northwest edge (hidden by fume just above center). A western pit, outside the left edge of the crater (hard to see in this photo), hosts a small sluggish lava pond. The vent supplying the June 27th lava flow is on the flank of Puʻu ʻŌʻō beyond the right edge of the photo. Right: Photo of Puʻu ʻŌʻō west of the crater, looking north-northwest. The west edge of the crater is to the right. The western pit, with the lava pond, is just above and left of center. Notice the vaguely arcuate line of fume that wraps from the south edge of the crater, around the western pit, and back to the northwest edge of the crater in the background. This fuming arc corresponds closely to the rim of the crater that was present in 2011. The surface of the crescent-shaped area bounded by this arc is sulfur stained and, when on the ground there, is found to be very hot, suggesting that there may be pockets of magma below the ground there. In time, other pits may form in this area, or the western pit may continue to widen, and eventually the entire crescent-shaped area could collapse and become part of the crater again.
August 28, 2015 Kīlauea
New lava flows at Puʻu ʻŌʻō
Left: View of Puʻu ʻŌʻō crater, looking south. The floor of the crater was resurfaced yesterday (August 27) by lava flows erupting from a vent at the northeast edge of the crater (fuming area to the left). Right: View of Puʻu ʻŌʻō from the south side, looking north. The current crater in Puʻu ʻŌʻō is only about half the diameter of Puʻu ʻŌʻō's previous crater, which is defined by the rim of the tephra cone remnants in the foreground and background. That older crater's western edge extended to about the left edge of the photograph. The current crater is 25–30 m (~80–100 ft) deep.
Left: A tiny lava pond, about 10 m (33 ft) across, was visible within a vent near the south edge of Puʻu ʻŌʻō's crater. Can you spot it? It's near the center of the photograph. Right: Yesterday's lava flows in Puʻu ʻŌʻō erupted from a vent at the northeast edge of the crater and added a new layer to the crater floor. This photograph looks northeast across the relatively smooth crater floor toward the vent that erupted, which is a spatter cone that appears as a faintly visible mound in the fume in the background.
Left: A piece of the new flow on the crater floor was collected for chemical analysis. Can you spot the USGS geologist collecting the sample? He is just below the center of the photograph. The small lava pond is just above center, partly hidden by a small spatter mound. Right: This photo is from within the crater, looking back at the USGS scientist who took the adjacent photo.
Left: USGS scientists make observations from the edge of Puʻu ʻŌʻō's current crater. Puʻu ʻŌʻō's high point – the northwestern remnant of the original cone that formed in the 1980's – is in the background. This higher ground provides a good perch for some of HVO's webcams, near upper right. Right: A large breakout from the lava tube on the north side of Puʻu ʻŌʻō yesterday (August 27) formed a large channelized flow, but it did not last long. The activity died in the evening, the same day, and traveled only about 500 m (about 550 yards). The recent flow is the lighter colored lava mostly left of center in the photograph, with its most distant tip approaching lower right. The photograph looks south toward Puʻu ʻŌʻō.
August 4, 2015 Kīlauea
High view of Puʻu ʻŌʻō; West pit in Puʻu ʻŌʻō
Left: High aerial view of Puʻu ʻŌʻō, looking south-southwest. The current crater at Puʻu ʻŌʻō is about 280 m (~920 ft) long and 230 m (~755 ft) wide, with a depth of about 25 m (~82 ft). To the west of the crater is another pit 49 m (~161 ft) across that contains a small lava pond. Right: The pit west of the Puʻu ʻŌʻō crater, shown here, is overhung on most sides and may continue to widen with time. The lava pond inside is relatively placid, appearing as a black surface, usually with a few tiny spattering areas along the edge.
View of the active flow field; Scientist collects lava sample
Left: Lava flows are scattered across a broad area extending from about 3 to 8 km (2–5 mi) northeast of Puʻu ʻŌʻō. The active flows start just above the horizontal mid-line of the photo, but cannot be picked out easily within the broader inactive flow field due to their distance away in this photo. The most distant active lava is burning forest, and the bluish smoke from this can be seen in a few areas in the distance, partly shrouded by clouds. Right: An HVO scientist collects a molten lava sample using a rock hammer. Molten lava on the flow field for the last several months has had a temperature usually around 1,140 ºC, or just under 2,100 ºF, when collected and can blister exposed skin when this close.
July 27, 2015 Kīlauea
Puʻu ʻŌʻō thermal camera viewing geometry
Views into Puʻu ʻŌʻō's current crater are often hampered by fume. To overcome this, HVO uses thermal cameras that detect heat and are better able to 'see' through the fume. This image mosaic compares the Puʻu ʻŌʻō thermal webcamera's view with an oblique aerial photograph to show what the thermal camera is looking at. The thermal webcamera is looking approximately toward the east and commonly shows several hot spots, which are outgassing vents. Three such hot vents were in view of the thermal camera on July 19, the date that the thermal camera captured the image on the left. The arrowed letters show how those vents match up between the thermal image and the aerial photograph. The thermal camera does not have a view of a pit which formed west of the current crater in late March and which contains a small lava pond.
July 23, 2015 Kīlauea
Breakouts active northeast of Puʻu ʻŌʻō, no recent overall advancement
Breakouts remain active northeast of Puʻu ʻŌʻō, but on today's overflight we observed a decrease in overall activity. In particular, breakouts that had been active closer to Puʻu ʻŌʻō on previous days, around Puʻu Kahaualeʻa, were inactive today. The active breakouts began about 4 km (2.5 miles) northeast of Puʻu ʻŌʻō and reached nearly 8 km (5 miles). This farthest distance has not changed significantly in recent weeks.
This photograph looks west along the East Rift Zone, towards Puʻu ʻŌʻō and Kīlauea's summit. Puʻu ʻŌʻō can be seen near the horizon, on the left side of the image. The farthest active lava today was near the smokey area in the left side of the image. Kīlauea's summit plume can be seen in the distance in the upper right portion of the photograph.
Left: A closer look at the north margin of the June 27th lava flow, where breakouts are active at the forest boundary. Right: Breakouts have further buried Puʻu Kahaualeʻa in recent weeks. The cone was originally covered in thick vegetation, but today only a single dead tree stands on the remnants of the cone rim.
An HVO geologist collects a sample of lava, quenching it in a bucket of water. Chemical analysis of the lava provides insight into changes in the magma plumbing system.
Summit lava lake at Halemaʻumaʻu at relatively low level
Left: The summit lava lake today was at a relatively low level, about 65 meters (210 feet) below the Overlook crater rim, associated with summit deflation. Spattering was active along the lake margins. This photograph shows overflows from April and May (dark lava in bottom portion of photograph) covering the floor of Halemaʻumaʻu Crater. Right: Pele's hair covers the roadside along Crater Rim Drive, next to the Halemaʻumaʻu parking lot, in an area of Hawaiʻi Volcanoes National Park closed to the public due to proximity to the summit lava lake. The Pele's hair (long strand of volcanic glass) is emitted from the lava lake and carried upwards by the rising gas plume, and then drifts downwind.
June 30, 2015 Kīlauea
Scattered breakouts northeast of Puʻu ʻŌʻō, but little forward progress
Active pāhoehoe lava is scattered over a broad area northeast of Puʻu ʻŌʻō, but has not advanced significantly over the past month. Today, the farthest active lava was about 7.5 km (4.7 miles) from the vent on Puʻu ʻŌʻō, with the leading tip of this breakout burning vegetation. Aerial view towards the southwest. Puʻu ʻŌʻō is in the upper left.
Left: A closer look at the upper June 27th flow field, where numerous breakouts were active. The active breakouts are visible as the light-colored areas near the bottom of the photo. In the lower right, the remains of Puʻu Kahaualeʻa can be seen. Puʻu ʻŌʻō is in the upper left. Right: A view of the southern portion of Puʻu ʻŌʻō crater, where two small incandescent vents have been active recently.
Left: A closer view of the one of the pāhoehoe breakouts near Puʻu Kahaualeʻa. The dark flakes on the surface are bits of crust from the underlying flow that get stuck to the front of the newer flow, and end up on the top surface as the nose of the new flow inflates. Right: A view of the breakouts active near Puʻu Kahaualeʻa.
June 19, 2015 Kīlauea
Scattered breakouts northeast of Puʻu ʻŌʻō, but little forward advancement
Scattered breakouts remain active northeast of Puʻu ʻŌʻō on the June 27th lava flow, but have not advanced significantly over the past month. This photo shows the farthest reach of active lava on the flow field today, which was about 8 km (5 miles) northeast of the vent on Puʻu ʻŌʻō. Minor brush fires were active where lava was entering forest.
Left: This photograph shows the south margin of the June 27th flow, northeast of Puʻu ʻŌʻō, where many small scattered breakouts were active. The active, and recently active, breakouts are visible at the light gray areas. Right: Little has changed in Puʻu ʻŌʻō over the past month, and a small lava pond still exists within the circular pit in the western portion of the crater. This pit can be seen through the fume in this photo, and a tiny area of incandescence at the edge of the active pond is barely visible.
June 9, 2015 Kīlauea
Summit lava lake well below Overlook crater rim
One month ago the summit lava lake was at the rim of the Overlook crater (the small crater in the center of the photo), spilling lava onto the floor of Halemaʻumaʻu Crater (the larger crater that fills much of the photo), creating the dark flows surrounding the Overlook crater. Since that time the lava lake has dropped, associated with summit deflation, and today the lake level was about 60 meters (200 feet) below the Overlook crater rim. The stack of recent overflows is visible on the wall of the Overlook crater as the layer of dark lava atop the older, light colored lava forming the majority of the Overlook crater wall.
The photo is taken from the southeast rim of Halemaʻumaʻu Crater. The closed Halemaʻumaʻu overlook is in the upper left corner of the photo. Jaggar Museum and HVO can be seen as a small bump on the horizon in the upper right portion of the photograph.
June 4, 2015 Kīlauea
Scattered breakouts northeast of Puʻu ʻŌʻō
Scattered breakouts remain active northeast of Puʻu ʻŌʻō. On today's overflight, breakouts were active as far as 8 km (5 miles) northeast of Puʻu ʻŌʻō. Some of this activity was at the forest boundary, burning vegetation. This narrow lobe, one of several active on the flow field today, traveled over earlier Puʻu ʻŌʻō lava (light brown) to reach the forest boundary.
Activity at Puʻu ʻŌʻō remains relatively steady. This photograph looks towards the southwest, and shows outgassing from numerous areas in Puʻu ʻŌʻō crater. On the far side of the crater, the small circular pit (right of center) had a small lava pond that was too deep to see from this angle.
Left: As shown in the May 21 field photos, the small forested cone of Puʻu Kahaualeʻa has been slowly buried by flows over the past several months. All that remains today are narrow portions of the rim standing above the lava. Right: Recent lava on the June 27th flow cascaded over the overhanging rim of this collapse pit on an earlier portion of the flow field.
Summit activity continues in Halemaʻumaʻu
Left: A wide view of the northern portion of Kīlauea Caldera, on an exceptionally clear day. HVO and Jaggar Museum can be seen as the light-colored spot on the caldera rim. Mauna Loa is in the distance. Right: Halemaʻumaʻu Crater, looking west. The dark area on the crater floor consists of recent overflows from the Overlook crater. The Overlook crater is near the left edge of the photo, and a portion of the active lava lake surface can be seen below the rim.
May 21, 2015 Kīlauea
Puʻu Kahaualeʻa nearly gone; lava flow intersects old tube
Puʻu Kahaualeʻa has been buried slowly by the Puʻu ʻŌʻō eruption over the years, and the ongoing June 27th flow has nearly finished the job. The image on the left shows Puʻu Kahaualeʻa on June 30, 2014, a few days after the June 27th flow started (the ʻaʻā flow just behind the cone is from the early stages of that flow); the image on the right shows Puʻu Kahaualeʻa today (May 21, 2015) from nearly the same perspective. Only the highest parts of Puʻu Kahaualeʻa's twin craters remain.
The most distant active tip of the June 27th flow, visible at the left edge of the photo, was about 8.5 km (~5.3 miles) from Puʻu ʻŌʻō today. This lobe of the flow intersected an old lava tube earlier in the week that transported lava a short distance downslope, where it emerged from skylights to make several small isolated pads of lava (center of the photo). The view is to the southwest, so Puʻu ʻŌʻō is well off in the distance beyond the top of the photo.
May 15, 2015 Kīlauea
Kīlauea summit vent lava lake continues to drop
Kīlauea Volcano's summit lava lake continued to drop today (May 15, 2015). Measurements of the lake surface late this afternoon showed that it was 62 m (203 ft) below the top of the newly-created vent rim, a ridge (or levee) of solidified lava about 8 m (26 ft) thick that accumulated on top of the Halemaʻumaʻu Crater floor from multiple overflows of the vent during the past two weeks.
May 13, 2015 Kīlauea
Webcam images capture lava veneer falling into summit lava lake
This sequence of HVO webcam images of Kīlauea Volcano's summit vent, recorded between 1:28 and 1:32 p.m., HST, on May 12, 2015, captures the moment a section of the dark-colored "bathtub ring" (a veneer of fresh lava that coats the vent wall as the lava lake level drops) fell into the lava lake (center). The lava veneer collapse, which produced a visible cloud of rock and lava fragments, agitated the lava lake surface and exposed lighter-colored layers of older rock in the vent wall (right).
May 12, 2015 Kīlauea
Lava lake in Halemaʻumaʻu Crater drops with summit deflation
The summit lava lake in Halemaʻumaʻu Crater has dropped significantly over the past two days, as Kīlauea's summit has deflated. The dropping lava level has allowed lava veneer on the walls of the Overlook crater to fall away, clearly exposing the contact between the original rim of the Overlook crater (which is the original, pre-overflow floor of Halemaʻumaʻu Crater) and the stack of recent lava overflows. These overflows are roughly 8 meters (26 feet) thick in total.
May 7, 2015 Kīlauea
Summit lava lake in Halemaʻumaʻu Crater remains at high level
The lava lake in the Overlook crater, within Halemaʻumaʻu Crater at Kīlauea's summit, remains at a high level and close to the Overlook crater rim. Overflows onto the Halemaʻumaʻu Crater floor have built up the rim of the Overlook crater several meters, and recent overflows are visible in the right side of the photograph. The lake level this afternoon was about 7 meters (yards) above the original (pre-overflow) floor of Halemaʻumaʻu Crater. Spattering was vigorous today in the southern portion of the lake. From this view, the spattering was hidden behind a portion of the Halemaʻumaʻu Crater wall, but airborne spatter can be seen in the bottom left portion of the photo. The summit of Mauna Loa can be seen in the upper right.
This Quicktime movie shows spattering at the margin of the summit lava lake in Halemaʻumaʻu Crater. Spattering has been common at the lake, and when it occurs is easily visible from the public viewing area at Jaggar Museum. This video shows a closer view from the rim of Halemaʻumaʻu, which is closed to the public due to volcanic hazards.
May 5, 2015 Kīlauea
Breakouts continue northeast of Puʻu ʻŌʻō
The June 27th lava flow remains active, with breakouts focused in several areas northeast of Puʻu ʻŌʻō. The farthest downslope activity observed on today's overflight was roughly 8 km (5 miles) northeast of Puʻu ʻŌʻō. This photograph shows one of the active breakouts closer to Puʻu ʻŌʻō.
One of several lobes on the June 27th flow that was at the forest boundary today, burning vegetation northeast of Puʻu ʻŌʻō.
Summit lava lake in Halemaʻumaʻu Crater remains at high level
Over the past week, the summit lava lake in the Overlook crater rose and spilled out onto the floor of Halemaʻumaʻu Crater, creating the dark flows in the south part of Halemaʻumaʻu (left side of crater from this direction). The extent of the lake itself, set within the Overlook crater, is slightly difficult to distinguish from this view but the spattering at the lake margin is visible. The overflows onto the Halemaʻumaʻu Crater floor, not counting the area of the lake itself, total about 11 hectares (28 acres).
Left: A closer look at the lava lake and overflows on the floor of Halemaʻumaʻu Crater. The outline of the Overlook crater, and the active lake, is easier to distinguish in this view. Right: From this angle, the extent of the lava lake within the Overlook crater is much easier to distinguish from the surrounding overflows. The closed Halemaʻumaʻu parking lot is in the right side of the photograph.
May 3, 2015 Kīlauea
Rockfall triggers small explosive event at summit lava lake
A portion of the Halemaʻumaʻu Crater wall collapsed at 1:20 pm today, impacting the lava lake and triggering a small explosion of spatter and a robust particle-laden plume. Fist-size clasts were deposited around the closed Halemaʻumaʻu visitor overlook.
A sequence of still images taken from the webcam positioned at the closed Halemaʻumaʻu overlook, spanning about six seconds. The collapse originated from a portion of the wall directly below the webcam, but just out of view. Large pieces of molten spatter can be seen flying through the air and being deposited on the crater walls below the camera.
This Quicktime movie shows a small explosive event that occurred at 1:20pm today at the summit lava lake. A collapse of a portion of the Halemaʻumaʻu Crater wall impacted the lake and triggered an explosion of spatter. Fist-size clasts were found scattered along the rim of Halemaʻumaʻu Crater near the closed visitor overlook.
April 30, 2015 Kīlauea
Summit lava lake level remains high
Following several episodes of lava overflowing onto the floor of Halemaʻumaʻu Crater, the lava lake level remains high, and close to the rim of the Overlook crater. This photograph was taken from the southern rim of Halemaʻumaʻu Crater, where a time-lapse camera keeps watch on the lava lake and overflow activity. The recent overflows are visible in the center of the photograph. HVO and Jaggar Museum are on the high point on the skyline near the top-center portion of the photograph. Mauna Loa is in the upper left portion of the photograph.
April 29, 2015 Kīlauea
Summit lava lake overflows vent rim
Photo from the rim of Halemaʻumaʻu showing the lava lake in the completely filled Overlook crater. Repeated overflows are beginning to construct levees around the lake, such that the level of the lake is now perched about 2 m (7 ft) above the original floor of Halemaʻumaʻu.
Left: Photo of the overflowing lava lake taken from the rim of Halemaʻumaʻu. Right: Identical to photo at left, but with labels. The dashed white line indicates the lava lake rim.
Kīlauea Volcano’s summit lava lake, which was about 12 m (40 ft) below the vent rim on April 25 (left), overflowed the vent rim for the first time at about 9:40 p.m., HST, on April 28. As of noon on April 29 (right), the lava lake had overflowed the vent rim several more times. These Webcam images capture the summit vent before and after the overflows.
April 28, 2015 Kīlauea
Lava lake level remains high, rockfall triggers explosive event
A rockfall from the wall of Halemaʻumaʻu Crater impacted the lava lake around 10:20 am, triggering an explosion of spatter and smaller particles. HVO geologists working on the far side of the crater captured the initial moments of the plume rising. The explosion deposited a large amount of spatter around the closed Halemaʻumaʻu visitor overlook.
Quicktime movie of the rockfall and subsequent explosion at 10:20 a.m., HST, on April 28, 2015. Rocks falling into the summit lava lake generated an explosion that threw large fragments of molten lava onto the rim of Halemaʻumaʻu Crater, 85 m (280 ft) above the lake. These fragments pose a significant hazard, and are one reason this area remains closed.
Left: A closer look at the Halemaʻumaʻu Crater overlook. The large boulders were ejected during the 1924 explosion, but today's explosive event carpeted the ground with many large pieces of brown spatter. Right: A close look at one of the large pieces of spatter thrown onto the rim of Halemaʻumaʻu Crater by today's explosion (keys are for scale). The spatter hit the ground in a semi-fluid state, deforming on impact. The small, multi-colored particles incorporated in the spatter are fragments of the altered crater wall that collapsed into the lake, while the brown spatter represents fresh lava from the lake.
Left: The explosion threw spatter that hit the remaining fencing on the Halemaʻumaʻu overlook, partly burning it. Keys for scale. Right: Portions of the Halemaʻumaʻu overlook fencing were knocked down by previous explosive events, and also by the wind over the past several years. The downed fencing, shown smoldering here, was then ignited by hot spatter from today's explosive event.
Left: Spatter from the explosion also landed on the Halemaʻumaʻu webcam, melting some of the wire insulation but not enough to interrupt its operation. Right: Gas in the lava lake was rapidly released during the 10:20 am explosive event, causing the lava lake surface to drop a few meters (yards). This photo was taken moments after the explosive event, and shows the overhanging ledge of lava along the rim that was exposed as the lava level dropped.