Time-lapse thermal image movie of Halemaumau Overlook Vent. November 2-9, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Overlook Vent. November 2-9, 2017. Images courtesy of USGS/HVO

Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. November2- 9, 2017. Images courtesy of USGS/HVO

Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. November 2-9, 2017. Images courtesy of USGS/HVO

(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 level fluctuated with summit inflation and deflation, ranging about 28–34 m (92–112 ft) below the vent rim. On the East Rift Zone, the 61g flow remained active, with lava reaching the Kamokuna delta and surface breakouts downslope of Pu‘u ‘Ō‘ō. The 61g flows do not pose an immediate threat to nearby communities.

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

No earthquakes were reported felt on the Island of Hawaiʻi during the past week:

Please visit the HVO website (https://volcanoes.usgs.gov/hvo) for past Volcano Watch articles, volcano updates and photos, recent earthquake 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. November 2-9, 2017. Images courtesy of USGS/HVO

Time-lapse movie from a camera positioned on the southeast flank of Puʻu ʻŌʻō, looking toward the active flow advancing to the southeast. The breakout point is at the left edge of the image, and the mid-field skyline at the right is roughly coincident with the top of the pali. November 2-9, 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. November 2-9, 2017. Images courtesy of USGS/HVO

This map shows recent changes to KÄ«lauea’s East Rift Zone lava flow field. The area of the active flow field as of October 12 is shown in pink, while widening and advancement of the active flow as of November 1 is shown in red. Older Pu‘u ‘Ō‘ō lava flows (1983–2016) are shown in gray. The yellow line is the trace of the active lava tube.

The blue lines over the Pu‘u ‘Ō‘ō flow field are steepest-descent paths calculated from a 2013 digital elevation model (DEM), while the blue lines on the rest of the map are steepest-descent paths calculated from a 1983 DEM (for calculation details, see http://pubs.usgs.gov/of/2007/1264/). Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth’s surface. DEMs, however, are not perfect, so the blue lines on this map can be used to infer only approximate flow paths. The base map is a partly transparent 1:24,000-scale USGS digital topographic map draped over the 1983 10-m digital elevation model (DEM)