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Volcano Watch: Kilauea activity update for April 20, 2017

The ocean entry at Kamokuna remains active, with a small lava delta. Views of the lava streams entering the water were obscured by the thick plume. Very weak littoral explosions were occurring. Photo taken Saturday, April 15, 2017 courtesy of USGS/HVO

The ocean entry at Kamokuna remains active, with a small lava delta. Views of the lava streams entering the water were obscured by the thick plume. Very weak littoral explosions were occurring. Photo taken Saturday, April 15, 2017 courtesy of USGS/HVO


Time-lapse movie of Halemaumau Overlook Vent. April 13-20, 2017. Images courtesy of USGS/HVO


Time-lapse thermal image movie of Halemaumau Overlook Vent. April 13-20, 2017. Images courtesy of USGS/HVO


Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. April 13-20, 2017. Images courtesy of USGS/HVO


Time-lapse movie of Kīlauea Caldera from Hawaiian Volcano Observatory. April 13-20, 2017. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Crater looking Southwest. April 13-20, 2017. 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 continued to rise and fall in concert with summit inflation and deflation. On the East Rift Zone, the 61g flow was still active, with lava entering the ocean near Kamokuna and surface breakouts downslope of Pu‘u ‘Ō‘ō. These flows do not pose an immediate threat to nearby communities.

Mauna Loa is not erupting. During the past week, small-magnitude earthquakes were recorded primarily beneath the upper west flank of the volcano, with most 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 in the past week. On April 14, at 12:16 a.m. HST a magnitude-2.8 earthquake occurred 5.3 km (3.3 mi) southeast of Kīlauea Volcano’s summit at 2.7 km (1.7 mi) depth.

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 movie of Pu’u ‘O’o Crater. April 13-20, 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. April 13-20, 2017. Images courtesy of USGS/HVO

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Apr 28, 2017 / 5:15 pm

 

 

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