Volcano Watch: Kilauea activity update for March 1, 2018


Time-lapse thermal image movie of Halemaumau Overlook Vent. February 22, 2018 to March 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Overlook Vent. February 22, 2018 to March 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. February 22, 2018 to March 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Kīlauea Caldera from Hawaiian Volcano Observatory. February 22, 2018 to March 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Crater looking Southwest. February 22, 2018 to March 1, 2018. 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 level fluctuated between about 36 to 42 m (118 to 138 ft) below the vent rim. On the East Rift Zone, the 61g lava flow remained active downslope of Pu‘u ‘Ō‘ō, with scattered breakouts on Pulama pali. No lava is entering the ocean. The 61g flows do not pose an immediate threat to nearby communities.

Mauna Loa Volcano is not erupting. A few small-magnitude earthquakes occurred beneath the volcano, primarily on its west flank, at depths shallower than 13 km (8 mi). GPS and InSAR measurements continue to show slow deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone. Rates of inflation in the past few months have decreased compared to rates of the past year. It is uncertain if these lower rates will persist or pick up again in the near future. No significant changes in volcanic gas emissions were measured.

No earthquakes were reported felt in Hawai‘i this past week.


Time-lapse movie of Pu’u ‘O’o Crater. February 22, 2018 to March 1, 2018. 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. February 22, 2018 to March 1, 2018. 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. February 22, 2018 to March 1, 2018. 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 January 30, 2018 is shown in pink, while widening and advancement of the active flow as of February 20, 2018 is shown in red. Older Puʻu ʻŌʻō lava flows (1983–2016) are shown in gray. The yellow line is the trace of the active lava tubes. The Kamokuna ocean entry is inactive. 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 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)

This map shows recent changes to Kīlauea’s East Rift Zone lava flow field. The area of the active flow field as of January 30, 2018 is shown in pink, while widening and advancement of the active flow as of February 20, 2018 is shown in red. Older Puʻu ʻŌʻō lava flows (1983–2016) are shown in gray. The yellow line is the trace of the active lava tubes. The Kamokuna ocean entry is inactive. 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)

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