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Photograph of fissure 3 erupting on Mauna Loa's Northeast Rift Zone the morning of November 29, 2022. The longest and largest lava flow is issuing from fissure 3. This lava flow crossed the Mauna Loa Weather Observatory Road at approximately 8 p.m.

Aerial view of the lava flows on the northeast flank of Mauna Loa, taken during a morning overflight on November 29, 2022. These lava flows are moving in a northeast direction, being fed by fissure vents on the Northeast Rift Zone. USGS photo by M. Patrick. 

A Hawaiian Volcano Observatory geologist documents a lava flow from the Northeast Rift Zone of Mauna Loa the morning of November 29, 2022. The ‘a‘ā lava flow, on the northeast flank of Mauna Loa, is several feet thick. 'A'ā flows have a rough rubbly surface composed of broken lava blocks called clinkers.

Aerial photos taken at 7:15 AM local time (HST) from Civil Air Patrol flight. Northeast rift zone eruption of Mauna Loa.

Aerial photos taken at 7:15 AM local time (HST) from Civil Air Patrol flight. Northeast rift zone eruption of Mauna Loa.

Aerial photos taken at 7:15 AM local time (HST) from Civil Air Patrol flight. Northeast rift zone eruption of Mauna Loa.

Aerial photos taken at 7:15 AM local time (HST) from Civil Air Patrol flight. Northeast rift zone eruption of Mauna Loa.

Aerial photo of a fissure and lava flows on Mauna Loa's Northeast Rift Zone at approximately 9:30 a.m. HST on November 28, 2022. The photo view is to the NW, with Mauna Kea on the right hand side of the image. USGS photo by K. Lynn.

Aerial photo of a fissure and lava flows on Mauna Loa's Northeast Rift Zone at approximately 9:30 a.m. HST on November 28, 2022. The photo view is to the NW, with Mauna Kea on the right hand side of the image. USGS photo by K. Lynn.

Lava fountains along a fissure on Mauna Loa's Northeast Rift Zone at approximately 9:30 a.m. HST on November 28, 2022. The photo was taken looking toward the north. USGS photo by K. Lynn.

Aerial view of Mauna Loa summit with Lua Hou in the foreground followed by Lua Hohonu, South Pit, and Mokuʻāweoweo summit caldera. A small dusting of snow covers the ground east of the summit. The steaming fissure was active during the beginning of the eruption, but this morning the lava in the summit caldera had already cooled to a black color.

Aerial photo of lava fountains along a fissure on Mauna Loa's northeast rift zone at approximately 9:30 a.m. HST on 28 November 2022. The photo was taken looking toward the north. USGS photo by K. Lynn.

Mauna Loa eruption as viewed from Waikoloa at about 1:25am local time (HST). The eruption is occurring from the summit of the volcano, though lava has overflowed the caldera.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo shows fissure vents erupting above 10,000 ft elevation on the Northeast Rift Zone of Mauna Loa and generating a lava flow on the northeast flank. Image courtesy of Civil Air Patrol.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo is looking at the line of fissure vents erupting above 10,000 ft elevation on the Northeast Rift Zone of Mauna Loa.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo is looking down on a section of the braided lava flow on the northeast flank.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo is looking down on a braided lava flow on the northeast flank.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo shows the line of fissure vents erupting above 10,000 ft elevation on the Northeast Rift Zone of Mauna Loa. Image courtesy of Civil Air Patrol.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo shows fissure vents erupting above 10,000 ft elevation on the Northeast Rift Zone of Mauna Loa. Image courtesy of Civil Air Patrol.

Aerial photo captured during an overflight of the Northeast Rift Zone eruption of Mauna Loa at approximately 5-6:30 p.m. HST on November 28, 2022. This photo shows fissure vents erupting above 10,000 ft elevation on the Northeast Rift Zone of Mauna Loa. Image courtesy of Civil Air Patrol.