Volcano Watch: Kilauea activity update for February 1, 2018


Time-lapse thermal image movie of Halemaumau Overlook Vent. January 25, 2018 to February 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Overlook Vent. January 25, 2018 to February 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. January 25, 2018 to February 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Kīlauea Caldera from Hawaiian Volcano Observatory. January 25, 2018 to February 1, 2018. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Crater looking Southwest. January 25, 2018 to February 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 with summit inflation and deflation, ranging about 25–34 m (82–110 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 pali and coastal plain, but no ocean entry. The 61g flows do not pose an immediate threat to nearby communities.

Mauna Loa Volcano is not erupting. Rates of deformation and seismicity remain above long-term background levels. Small-magnitude earthquakes occurred beneath the summit caldera and upper Southwest Rift Zone at depths less than 5 km (3 mi). The rate of seismicity near the summit was slightly greater during the past week than in recent weeks. A few deeper earthquakes were scattered beneath the volcano’s flanks at depths less 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, but rates in the past few months have decreased compared to rates of the past year. No significant changes in volcanic gas emissions were measured.

No earthquakes were reported as felt in Hawaii this past week.

Please visit the HVO website (volcanoes.usgs.gov/hvo) for past Volcano Watch articles, Kīlauea daily eruption updates, Mauna Loa weekly updates, volcano photos, maps, 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 movie of Pu’u ‘O’o Crater. January 25, 2018 to February 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. January 25, 2018 to February 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. January 25, 2018 to February 1, 2018. Images courtesy of USGS/HVO

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