Time-lapse movie of Halemaumau Overlook Vent. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse thermal image movie of Halemaumau Overlook Vent. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Crater from the south rim. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Overlook Vent from the West Rim of Halemaumau Crater. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Halemaumau Crater looking Southwest. July 23-30, 2015. Images courtesy of Hawaii Volcanoes National Park

Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. July 23-30, 2015. Images courtesy of USGS/HVO

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

KÄ«lauea’s summit lava lake level fluctuated this past week between about 50 and 70 m (164 – 230 ft) below the vent rim.

KÄ«lauea’s East Rift Zone “June 27th lava flow” continues to feed widespread breakouts northeast of PuÊ»u ʻŌʻō. All active lava remains within about 8 km (5 mi) of PuÊ»u ʻŌʻō. The most distant breakouts are evident by the smoke plumes produced by burning vegetation along the edge of the flow field.

No felt earthquakes were reported on the Island of Hawai‘i this past week.

Please visit the HVO website (http://hvo.wr.usgs.gov) for past Volcano Watch articles, KÄ«lauea daily eruption updates and other volcano status reports, current volcano photos, recent earthquakes, and more; call (808) 967-8862 for a KÄ«lauea summary update; email questions to askHVO@usgs.gov

Views into PuÊ»u ʻŌʻō’s current crater are often hampered by fume. To overcome this, HVO uses thermal cameras that detect heat and are better able to ‘see’ through the fume. This image mosaic compares the PuÊ»u ʻŌʻō thermal webcamera’s view with an oblique aerial photograph to show what the thermal camera is looking at. The thermal webcamera is looking approximately toward the east and commonly shows several hot spots, which are outgassing vents. Three such hot vents were in view of the thermal camera on July 19, the date that the thermal camera captured the image on the left. The arrowed letters show how those vents match up between the thermal image and the aerial photograph. The thermal camera does not have a view of a pit which formed west of the current crater in late March and which contains a small lava pond.

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. July 30, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Pu’u ‘O’o Crater North Flank from the North Rim. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse multi-image movie of Pu’u ‘O’o Crater. July 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse multi-image movie of Mokuʻāweoweo Caldera from the Northwest Rim on Mauna Loa. July 23-30, 2015. Images courtesy of USGS/HVO