Several vents have opened on PuÊ»u ʻŌʻō’s northeast flank since last December. A spatter cone grew over one of the vents in mid-May and is visible at the center of the photo emitting bluish fume. In recent weeks, a vent opened upslope from (to the left of) the spatter cone, revealing bright incandescence. The northeast edge of PuÊ»u ʻŌʻō’s crater, filled with white fume, is to the left of this vent. Photo taken Thursday, June 16, 2016 courtesy of USGS/HVO

Though difficult to photograph, aerial views showed that this open vent was but a small window into a large, hot cavity beneath PuÊ»u ʻŌʻō’s northeast flank. Inside, streams of lava from an unseen source (or sources) closer to the crater rim (visible at lower right) were cascading toward the upper left into unknown depths. This view, looking almost straight down, shows the surface of one of these lava streams through the open vent. The ground around this entire area is sunken, corroded, and unstable, and may someday collapse to form a pit. Photo taken Thursday, June 16, 2016 courtesy of USGS/HVO

June 16, 2016 Flowing Toward Pali from Mick Kalber on Vimeo.

Video courtesy of Tropical Visions Video with air transportation by Paradise Helicopters.

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Time-lapse thermal image movie of Halemaumau Overlook Vent. June 9-16, 2016. Images courtesy of USGS/HVO

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Time-lapse movie of Halemaumau Overlook Vent. June 9-16, 2016. Images courtesy of USGS/HVO

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Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. June 9-16, 2016. Images courtesy of USGS/HVO

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Time-lapse movie of Halemaumau Crater looking Southwest. June 9-16, 2016. Images courtesy of Hawaii Volcanoes National Park

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Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. June 9-16, 2016. Images courtesy of USGS/HVO

(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

Kīlauea continues to erupt at its summit and East Rift Zone. During the past week, the summit lava lake level varied between about 30 m and 37 m (100–120 ft) below the vent rim within Halema‘uma‘u Crater. On the East Rift Zone, the June 27th lava flow is inactive. The eastern Pu‘u ‘Ō‘ō breakout remained active, producing a lava flow (informally called the “61g flow”) that continued to advance to the southeast. As of June 16, 2016, the flow was about 4.4 km (2.7 mi) long. No lava flows were threatening nearby communities.

Mauna Loa is not erupting. Seismicity rates have decreased since the earthquake activity recorded in late May, but remain above background levels. Deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone continues, with inflation recently occurring mainly in the southwestern part of Mauna Loa’s magma storage complex.

No earthquakes were reported felt on the Island of Hawaiʻi this past week.

Please visit the HVO website (http://hvo.wr.usgs.gov) for past Volcano Watch articles, KÄ«lauea daily eruption updates, Mauna Loa weekly updates, volcano photos, recent earthquakes info, and more; call for summary updates at 808-967-8862 (KÄ«lauea) or 808-967-8866 (Mauna Loa); email questions to askHVO@usgs.gov

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Time-lapse movie from images gathered from a temporary thermal camera looking into Pu’u ‘O’o Crater. The temperature scale is in degrees Celsius up to a maximum of 500 Celsius (932 Fahrenheit) for this camera model, and scales based on the maximum and minimum temperatures within the frame. Thick fume, image pixel size and other factors often result in image temperatures being lower than actual surface temperatures. June 9-16, 2016. Images courtesy of USGS/HVO

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Time-lapse multi-image movie of Pu’u ‘O’o Crater. June 9-16, 2016. Images courtesy of USGS/HVO