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Volcano Watch: Kilauea activity update for November 23, 2017


This video shows typical spattering in the summit lava lake in Halema‘uma‘u Crater. Spattering is driven by the bursting of large gas bubbles. The surface crust tends to flow into the spattering sites, where the crust is shredded and sinks. Video taken Monday, November 20, 2017 courtesy of USGS/HVO


Time-lapse thermal image movie of Halemaumau Overlook Vent. November 16-22, 2017. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Overlook Vent. November 16-22, 2017. Images courtesy of USGS/HVO


Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. November 16-22, 2017. Images courtesy of USGS/HVO


Time-lapse movie of Kīlauea Caldera from Hawaiian Volcano Observatory. November 16-22, 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 31–41 m (102–135 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 the coastal plain. The 61g flows do not pose an immediate threat to nearby communities.

Mauna Loa is not erupting. A few small-magnitude earthquakes occurred beneath the summit caldera and upper Southwest Rift Zone at depths less than 5 km (3 mi), with a few deeper earthquakes scattered beneath the volcano’s southeast and west flanks at depths of 5-13 km (3-8 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.

One earthquake was reported felt on the Island of Hawaiʻi this past week. On November 22, at 3:33 a.m. HST, a magnitude-3.4 earthquake occurred at 6 km (3.7 mi) depth, 6.4 km (3.9 mi) west of Kīlauea’s summit.

Please visit the HVO website (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 (Kīlauea) or 808-967-8866 (Mauna Loa). Email questions to askHVO@usgs.gov.


Time-lapse movie of Pu’u ‘O’o Crater. November 16-22, 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 16-22, 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 16-22, 2017. Images courtesy of USGS/HVO

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