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

Time-lapse movie of Halemaumau Overlook Vent. May 11-18, 2017. Images courtesy of USGS/HVO

Time-lapse thermal image movie of Halemaumau Overlook Vent. May 11-18, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. May 11-18, 2017. Images courtesy of USGS/HVO

Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. May 11-18, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Crater looking Southwest. May 11-18, 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 around 15–28 m (49–92 ft) below the vent rim. On the East Rift Zone, the 61g flow remained active, with lava entering the ocean near Kamokuna and surface breakouts downslope of Pu‘u ‘Ō‘ō. These flows do not pose an immediate threat to nearby communities.

Mauna Loa is not erupting. During the past week, small-magnitude earthquakes were recorded mostly beneath the summit caldera and upper Southwest Rift Zone at depths up to 5 km (3 mi). Microearthquakes also occurred on the east flank of the volcano at depths of 5-13 km (3-8 mi). GPS measurements continue to show deformation consistent with inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone. No significant changes in volcanic gas emissions were measured.

Two earthquakes were reported felt on the Island of Hawaiʻi during the past week. On May 15, at 2:53 p.m. HST, a magnitude-2.6 earthquake occurred 16 km (10 mi) west of Waikoloa Village at a depth of 42 km (26 mi). On May 11, 4:47 p.m. HST, a magnitude-3.5 earthquake occurred 8 km (5 mi) northeast of Pāhala at a depth of 34 km (21 mi).

Please visit the HVO website (https://volcanoes.usgs.gov/observatories/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. May 11-18, 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. May 11-18, 2017. Images courtesy of USGS/HVO