Posted on January 12, 2017.
The November 21 breakout from the episode 61g lava flow remains active. The tip is 2.4 km (1.5 mi) straight-line from the vent, and the furthest active lava is roughly 600 m (660 yd) back from the tip. The breakout, extending to the lower right of the image, can be identified by its light silver color. Puʻu ʻŌʻō is visible in the upper left of the photo. Photo taken Thursday, January 12, 2017 courtesy of USGS/HVO
The Kamokuna ocean entry remains active. On December 31, approximately 21 acres of delta collapsed into the ocean. The remaining ~2.5 acres can be seen at the base of the sea cliff in long narrow sections. On the lower right of the photo, a scarp is visible where a portion of the old sea cliff collapsed. Degassing from the 61g lava tube is visible from the ocean entry to the upper right of the photo, and Puʻu ʻŌʻō is visible in the top middle of the photo. Photo taken Thursday, January 12, 2017 courtesy of USGS/HVO
A close up view of where approximately 4 acres of old sea cliff fell into the ocean during the delta collapse on December 31. The far eastern end of this collapse (right), is where the old public viewing area was located prior to the collapse. Photo taken Thursday, January 12, 2017 courtesy of USGS/HVO
On the left is a normal photograph of the ocean entry, which produces a robust steam plume and an area of discolored water extending out from the entry point. The thermal image on the right shows how this area of discolored water corresponds to scalding water temperatures. Photos taken Thursday, January 12, 2017 courtesy of USGS/HVO
Another view of the ocean entry, with the plume of hot water extending out from the ocean entry point. Photo taken Thursday, January 12, 2017 courtesy of USGS/HVO
January 12, 2017 61G Lava Update from Mick Kalber on Vimeo.
Video courtesy of Tropical Visions Video with air transportation by Paradise Helicopters.
Time-lapse thermal image movie of Halemaumau Overlook Vent. January 5-12, 2017. Images courtesy of USGS/HVO
Time-lapse movie of Halemaumau Overlook Vent. January 5-12, 2017. Images courtesy of USGS/HVO
Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. January 5-12, 2017. Images courtesy of USGS/HVO
Time-lapse movie of Kīlauea Caldera from Hawaiian Volcano Observatory. January 5-12, 2017. Images courtesy of USGS/HVO
Time-lapse movie of Halemaumau Crater looking Southwest. January 5-12, 2017. Images courtesy of Hawaii Volcanoes National Park
(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. This past week, the summit lava lake level varied between about 16.5 and 33.5 m (54–110 ft) below the vent rim. The 61g flow was still active, with lava entering the ocean near Kamokuna and surface breakouts near Pu‘u ‘Ō‘ō. The 61g flow does not pose an immediate threat to nearby communities.
Mauna Loa is not erupting. During the past week, small-magnitude earthquakes continued, primarily beneath the upper Southwest Rift Zone and summit caldera at depths less than 5 km (3 miles). GPS measurements continue to show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone, although rates appear to have slowed over the past month.
Two earthquakes were reported felt in Hawaii this past week. On January 9, at 2:20 p.m., HST, a magnitude-3.1 earthquake occurred 62 km (38.5 mi) southwest of Lāna‘i City, Lāna‘i, at a depth of 10 km (6.2 mi). On January 7, at 10:24 a.m., HST, a magnitude-3.5 earthquake occurred 16.0 km (9.9 mi) north of Pāhala, Hawaiʻi, at a depth of 9.4 km (5.8 mi).
Please visit the HVO website (hvo.wr.usgs.gov) for past Volcano Watch articles, Kīlauea daily eruption updates, Mauna Loa weekly updates, volcano photos, recent earthquakes info, and more; call for summary updates at 808-967-8862 (Kīlauea) or 808-967-8866 (Mauna Loa); email questions to askHVO@usgs.gov.
Time-lapse image movie from a research camera positioned on Holei Pali, looking east towards Lava Flow 61G and Kalapana. January 5-12, 2017. Images courtesy of USGS/HVO
This map shows recent changes to Kīlauea’s East Rift Zone lava flow field. The area of the active flow field as of December 14 is shown in pink, while widening and advancement of the active flow as of January 12 is shown in red. Older Puʻu ʻŌʻō lava flows (1983–2016) are shown in gray. Surface flows are focused on a branch of the flow east of Puʻu ʻŌʻō that has been active since late last year. The front of that flow branch has stalled, but there are weak scattered breakouts upslope along its length.
Disregard the area around the Kamokuna ocean entry, where the Kamokuna lava delta collapsed on New Year’s Eve. The lava flow polygons in these maps are layered to show additions to flow. As such, they do not show where material has been removed, such as by lava delta collapse.
The blue lines over the Puʻu ʻŌʻō 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 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).