Clear skies and sunshine provided a spectacular view of KÄ«lauea Volcano’s summit lava lake Wednesday morning. Spattering on the north side and center of the lake surface—a departure from its more common location on the southeast side of the lake—occasionally happens when the surface flow direction reverses. Spattering occurs when gas bubbles within the lava lake burst. Video taken Wednesday, April 4, 2018 courtesy of U.S. Geological Survey

Time-lapse thermal image movie of Halemaumau Overlook Vent. March 29, 2018 to April 5, 2018. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Overlook Vent. March 29, 2018 to April 5, 2018. Images courtesy of USGS/HVO

Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. March 29, 2018 to April 5, 2018. Images courtesy of USGS/HVO

Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. March 29, 2018 to April 5, 2018. Images courtesy of USGS/HVO

(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

This past week, KÄ«lauea Volcano’s summit lava lake level fluctuated with summit inflation and deflation, ranging about 24–30 m (79–98 ft) below the vent rim. On the East Rift Zone, the 61g lava flow remained active with breakouts on the upper part of the flow field, closer to Pu‘u ‘Ō‘ō. There were no active lava flows on the pali, coastal plain, or entering the ocean. The 61g flows do not pose an immediate threat to nearby communities.

Mauna Loa is not erupting. Rates of deformation and seismicity have not changed significantly over the past week, but persist above long-term background levels. Only a few small-magnitude earthquakes occurred beneath the volcano, primarily 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.

No earthquakes were reported felt in Hawaii this past week.

Time-lapse movie of Pu’u ‘O’o Crater. March 29, 2018 to April 5, 2018. Images courtesy of USGS/HVO

Time-lapse movie from images gathered from a temporary thermal camera looking into Pu’u ‘O’o Crater. The temperature scale is in degrees Celsius up to a maximum of 500 Celsius (932 Fahrenheit) for this camera model, and scales based on the maximum and minimum temperatures within the frame. Thick fume, image pixel size and other factors often result in image temperatures being lower than actual surface temperatures. March 29, 2018 to April 5, 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. March 29, 2018 to April 5, 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. March 29, 2018 to April 5, 2018. Images courtesy of USGS/HVO