Time-lapse thermal image movie of Halemaumau Overlook Vent. September 17-24, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Overlook Vent. September 17-24, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Crater from the south rim. September 17-24, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Overlook Vent from the West Rim of Halemaumau Crater. September 17-24, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. September 17-24, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Crater looking Southwest. September 17-24, 2015. Images courtesy of Hawaii Volcanoes National Park

Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. September 17-24, 2015. Images courtesy of USGS/HVO

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

Kīlauea continues to erupt at its summit and East Rift Zone with no significant changes this past week. The summit lava lake level varied between about 52 and 65 m (170–215 ft) below the vent rim within Halema‘uma‘u Crater. On the East Rift Zone, scattered lava flow activity remained within 8 km (5 mi) of Puʻu ʻŌʻō.

Mauna Loa is not erupting. On September 17, 2015, the Volcano Alert Level and Aviation Color Code for Mauna Loa were elevated to Advisory/Yellow based on long-term trends in monitoring data. During the past week, earthquake rates continued to be elevated, though at a lower rate than the previous week, and deformation data continued to indicate slight inflation.

There were no earthquakes reported felt on the Island of Hawai‘i during the past week.

Please visit the HVO website (http://hvo.wr.usgs.gov) for past Volcano Watch articles, KÄ«lauea daily eruption updates, Mauna Loa weekly updates, volcano photos, recent earthquakes info, and more; call for summary updates at 808-967-8862 (KÄ«lauea) or 808-967-8866 (Mauna Loa); email questions to askHVO@usgs.gov

Time-lapse movie of Pu’u ‘O’o Crater North Flank from the North Rim. September 17-24, 2015. Images courtesy of USGS/HVO

An HVO geologist performs a routine check of the thermal camera and webcam at the summit of Mauna Loa. Photo taken Saturday, September 19, 2015 courtesy of USGS/HVO

This panorama is from the north rim of Mauna Loa’s summit caldera, Mokuʻāweoweo, and shows the thermal camera watching for changes on the caldera floor. Photo taken Saturday, September 19, 2015 courtesy of USGS/HVO