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

A breakout that started June 26 on the upper pali is now advancing across the coastal plain. The flow front has advanced approximately 500 m (0.3 miles) from the base of the pali, and was about 2.7 km (1.7 miles) from the emergency road this morning. The pāhoehoe flow front, visible in the center of the photo, was very fluid and active when mapped today by geologists. Active and recently active surface flows are silver in appearance, like the flow front; also note the silver appearance on the steep part of the pali to the right of the kipuka. The main tube system for the episode 61g flow is degassing higher up on the pali (left-center). Photo taken Thursday, July 6, 2017 courtesy of USGS/HVO

A closer look at the pāhoehoe flow on the coastal plain with pali in background. As the flow spread across the ground, its surface cooled and developed a hardened crust. Continued addition of new lava into the interior of the flow eventually raised and broke through the rigid crust, allowing molten lava from the interior to escape through the new openings and spread forward. Note the rigid crust on top of the red, molten lava. Photo taken Thursday, July 6, 2017 courtesy of USGS/HVO

Time-lapse thermal image movie of Halemaumau Overlook Vent. June 29-July 6, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Overlook Vent. June 29-July 6, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. June 29-July 6, 2017. Images courtesy of USGS/HVO

Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. June 29-July 6, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Crater looking Southwest. June 29-July 6, 2017. Images courtesy of Hawaii Volcanoes National Park

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

This past week, Kīlauea Volcano’s summit lava lake fluctuated in concert with summit inflation and deflation, with levels ranging 21–41 m (69–135 ft) below the vent rim. On the East Rift Zone, the 61g flow remained active, with lava entering the ocean near Kamokuna and surface flows downslope of Pu‘u ‘Ō‘ō. The 61g flows do not pose an immediate threat to nearby communities.

Mauna Loa is not erupting. During the past week, small-magnitude earthquakes occurred beneath the volcano, primarily in the south caldera and upper Southwest Rift Zone, at depths less than 5 km (3 mi). GPS measurements continue to show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone. No significant changes in volcanic gas emissions were measured.

No earthquakes were reported felt in Hawaii during the past week.

Please visit the HVO website (https://volcanoes.usgs.gov/hvo) 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.

Time-lapse movie of Pu’u ‘O’o Crater. June 29-July 6, 2017. Images courtesy of USGS/HVO

Time-lapse image movie from a research camera positioned on Holei Pali, looking east towards Lava Flow 61G and Kalapana. June 29-July 6, 2017. Images courtesy of USGS/HVO