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Color graphic showing lava flow map and images of eruption
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.

Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach. The eruption started at the summit (top right of main map) on April 10.

Color photograph of the Kaoiki
May 22, 2026 — View of Kaoiki fault on Mauna Loa
May 22, 2026 — View of Kaoiki fault on Mauna Loa
May 22, 2026 — View of Kaoiki fault on Mauna Loa

An aerial view of the Kaoiki fault on the south flank of Mauna Loa. Grassy slopes mark this fault, with Mauna Loa lava flows in the foreground and the slope of Mauna Loa in the background. This fault is prominently visible while driving Highway 11 in the Kaʻū Desert area of Hawaiʻi Volcanoes National Park. USGS photo by K. Mulliken. 

An aerial view of the Kaoiki fault on the south flank of Mauna Loa. Grassy slopes mark this fault, with Mauna Loa lava flows in the foreground and the slope of Mauna Loa in the background. This fault is prominently visible while driving Highway 11 in the Kaʻū Desert area of Hawaiʻi Volcanoes National Park. USGS photo by K. Mulliken. 

Black and white photograph of lava flow
1926 Mauna Loa ‘a‘ā flow headed for Ho‘ōpūloa village
1926 Mauna Loa ‘a‘ā flow headed for Ho‘ōpūloa village
1926 Mauna Loa ‘a‘ā flow headed for Ho‘ōpūloa village

During the 1926 Mauna Loa eruption, an ‘a‘ā flow about 457 m (1500 ft) wide and 9 m (30 ft) high headed straight for the village of Ho‘ōpūloa on April 17, as shown here. By the next day, the lava flow had destroyed a dozen houses, a church, and the wharf, and had nearly obliterated the bay. 

During the 1926 Mauna Loa eruption, an ‘a‘ā flow about 457 m (1500 ft) wide and 9 m (30 ft) high headed straight for the village of Ho‘ōpūloa on April 17, as shown here. By the next day, the lava flow had destroyed a dozen houses, a church, and the wharf, and had nearly obliterated the bay. 

Color photograph of volcano summit
December 23, 2025 — Mauna Loa summit and Mauna Kea
December 23, 2025 — Mauna Loa summit and Mauna Kea
December 23, 2025 — Mauna Loa summit and Mauna Kea

At the end of their Mauna Loa summit overflight on December 23, USGS Hawaiian Volcano Observatory geologists passed the 2022 Northeast Rift Zone eruption site. In this photo, an older vent known as Steaming Cone is visible in the lower-left of the frame (red and white colors), with the 2022 fissure 3 cone just to the right of it (black and brown colors).

At the end of their Mauna Loa summit overflight on December 23, USGS Hawaiian Volcano Observatory geologists passed the 2022 Northeast Rift Zone eruption site. In this photo, an older vent known as Steaming Cone is visible in the lower-left of the frame (red and white colors), with the 2022 fissure 3 cone just to the right of it (black and brown colors).

Color photograph of volcanic landscape
December 2, 2025—Kīlauea, Mauna Loa, and Mauna Kea
December 2, 2025—Kīlauea, Mauna Loa, and Mauna Kea
December 2, 2025—Kīlauea, Mauna Loa, and Mauna Kea

This aerial photograph shows Kīlauea, Mauna Loa and Mauna Kea. In the foreground is the forested area just north of Kīlauea caldera; the slope of Mauna Loa's Northeast Rift Zone rises to the left side of the image, while Mauna Kea is visible in the background. USGS photo by K. Mulliken. 

This aerial photograph shows Kīlauea, Mauna Loa and Mauna Kea. In the foreground is the forested area just north of Kīlauea caldera; the slope of Mauna Loa's Northeast Rift Zone rises to the left side of the image, while Mauna Kea is visible in the background. USGS photo by K. Mulliken. 

Videos

Color photograph of volcano Color photograph of volcano
Mauna Loa 2022 Eruption Anniversary
Mauna Loa 2022 Eruption Anniversary

Mauna Loa 2022 eruption anniversary video. Mauna Loa is Earth's largest active volcano and covers just over half of the Island of Hawaiʻi. It erupted most recently in November-December 2022, and it will erupt again.

Mauna Loa 2022 eruption anniversary video. Mauna Loa is Earth's largest active volcano and covers just over half of the Island of Hawaiʻi. It erupted most recently in November-December 2022, and it will erupt again.

Color photograph of volcano Color photograph of volcano
Mauna Loa 2022 Eruption Anniversary (AD)
Mauna Loa 2022 Eruption Anniversary (AD)

Mauna Loa 2022 eruption anniversary video. Mauna Loa is Earth's largest active volcano and covers just over half of the Island of Hawaiʻi. It erupted most recently in November-December 2022, and it will erupt again.

Mauna Loa 2022 eruption anniversary video. Mauna Loa is Earth's largest active volcano and covers just over half of the Island of Hawaiʻi. It erupted most recently in November-December 2022, and it will erupt again.

Color photograph of volcanic vent and channel Color photograph of volcanic vent and channel
December 8, 2022 — Mauna Loa Fissure 3
December 8, 2022 — Mauna Loa Fissure 3

During a morning overflight on December 9, 2022, Hawaiian Volcano Observatory geologists noted a reduced output of lava at fissure 3 on the Northeast Rift Zone of Mauna Loa. The lava fountain is much lower than yesterday and the lava in the channel is much lower than the levees. USGS video by M. Patrick. 

During a morning overflight on December 9, 2022, Hawaiian Volcano Observatory geologists noted a reduced output of lava at fissure 3 on the Northeast Rift Zone of Mauna Loa. The lava fountain is much lower than yesterday and the lava in the channel is much lower than the levees. USGS video by M. Patrick. 

Color photograph of lava channel Color photograph of lava channel
December 9, 2022 — Mauna Loa Fissure 3 Lava Channel
December 9, 2022 — Mauna Loa Fissure 3 Lava Channel

Aerial view of the upper lava channel from fissure 3 on the Northeast Rift Zone of Mauna Loa. On December 9, 2022, Hawaiian Volcano Observatory geologists noted a reduced output of lava at fissure 3 and this photo shows that the level of lava in the channel is the lowest it has been since the eruption started. USGS video by M. Patrick. 

Aerial view of the upper lava channel from fissure 3 on the Northeast Rift Zone of Mauna Loa. On December 9, 2022, Hawaiian Volcano Observatory geologists noted a reduced output of lava at fissure 3 and this photo shows that the level of lava in the channel is the lowest it has been since the eruption started. USGS video by M. Patrick. 

Color photograph of volcanic vent Color photograph of volcanic vent
December 9, 2022 — Mauna Loa Fissure 3
December 9, 2022 — Mauna Loa Fissure 3

Aerial view of fissure 3 erupting on the Northeast Rift Zone of Mauna Loa on December 9, 2022. The eruption continues but the vigor has greatly reduced over the past 24 hours. USGS video by M. Patrick. 

Aerial view of fissure 3 erupting on the Northeast Rift Zone of Mauna Loa on December 9, 2022. The eruption continues but the vigor has greatly reduced over the past 24 hours. USGS video by M. Patrick. 

Color photograph of volcanic vent Color photograph of volcanic vent
December 8, 2022 — Mauna Loa Fissure 3
December 8, 2022 — Mauna Loa Fissure 3

The Northeast Rift Zone eruption of Mauna Loa continues with a major change overnight. The fissure 3 (F3) vent continues to erupt but the supply of lava appears to be much reduced this morning. Lava is overtopping channels near the vent with flows extending no farther than 2.5 mi (4 km) from the vent.

The Northeast Rift Zone eruption of Mauna Loa continues with a major change overnight. The fissure 3 (F3) vent continues to erupt but the supply of lava appears to be much reduced this morning. Lava is overtopping channels near the vent with flows extending no farther than 2.5 mi (4 km) from the vent.

Audio

Color graphic showing lava flow map and images of eruption
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.
Volcano Minute — The 1926 eruption of Mauna Loa occurred 100 years ago this year
Volcano Minute — The 1926 eruption of Mauna Loa occurred 100 years ago this year
Color graphic showing lava flow map and images of eruption
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.
Map of the 1926 Mauna Loa lava flows (red), with all Mauna Loa lava flows since 1843 shown in peach.
Volcano Minute — The 1926 eruption of Mauna Loa occurred 100 years ago this year

The Volcano Minute is a brief audio update about eruptions, earthquakes, or ongoing volcano science in Hawaii, brought to you by scientists and affiliates of the U.S. Geological Survey Hawaiian Volcano Observatory.


 

The Volcano Minute is a brief audio update about eruptions, earthquakes, or ongoing volcano science in Hawaii, brought to you by scientists and affiliates of the U.S. Geological Survey Hawaiian Volcano Observatory.


 

CVO Seismologist Wes Thelen pointing out a small earthquake at Mount Adams.
CVO Seismologist Wes Thelen pointing out a small earthquake at Mount Adams.
CVO Seismologist Wes Thelen pointing out a small earthquake at Mount Adams.
Volcano Minute — Magnitude-4.8 deep beneath Pāhala on November 5, 2024
Volcano Minute — Magnitude-4.8 deep beneath Pāhala on November 5, 2024

Webcams

webcam image of flank of volcano
[MSTcam] South Pit and Upper Southwest Rift Zone - thermal image from Moku‘āweoweo south rim
[MSTcam] South Pit and Upper Southwest Rift Zone - thermal image from Moku‘āweoweo south rim
[MSTcam] South Pit and Upper Southwest Rift Zone - thermal image from Moku‘āweoweo south rim

This image is from a research camera positioned on the south rim of Mokuʻāweoweo, Mauna Loa's summit caldera, in Hawaiʻi Volcanoes National Park. The camera looks west-southwest, across South Pit, focusing on the south part of Mauna Loa's summit region and upper Southwest Rift Zone.

This image is from a research camera positioned on the south rim of Mokuʻāweoweo, Mauna Loa's summit caldera, in Hawaiʻi Volcanoes National Park. The camera looks west-southwest, across South Pit, focusing on the south part of Mauna Loa's summit region and upper Southwest Rift Zone.

Color webcam image showing rift zone of volcano
[MDLcam] The Upper and Middle Parts of Mauna Loa's Southwest Rift Zone
[MDLcam] The Upper and Middle Parts of Mauna Loa's Southwest Rift Zone
[MDLcam] The Upper and Middle Parts of Mauna Loa's Southwest Rift Zone

Live image of Mauna Loa's upper and middle Southwest Rift Zone from Dandelion Cone along the middle part of the rift zone [MDLcam]. This camera is a pan-tilt-zoom model and the view may change depending on activity.

 

Disclaimer

Live image of Mauna Loa's upper and middle Southwest Rift Zone from Dandelion Cone along the middle part of the rift zone [MDLcam]. This camera is a pan-tilt-zoom model and the view may change depending on activity.

 

Disclaimer

Color webcam image showing flank of volcano
[MSPcam] Mauna Loa's Southwest Rift Zone from the South Point area
[MSPcam] Mauna Loa's Southwest Rift Zone from the South Point area
[MSPcam] Mauna Loa's Southwest Rift Zone from the South Point area

Live image of Mauna Loa's Southwest Rift Zone from the South Point area [MSPcam]. This camera is a pan-tilt-zoom model and the view may change depending on activity.

 

Disclaimer

Live image of Mauna Loa's Southwest Rift Zone from the South Point area [MSPcam]. This camera is a pan-tilt-zoom model and the view may change depending on activity.

 

Disclaimer

Webcam image view of volcano flank
[HLcam] Live Image of Mauna Loa's northwest flank from Hualālai volcano
[HLcam] Live Image of Mauna Loa's northwest flank from Hualālai volcano
[HLcam] Live Image of Mauna Loa's northwest flank from Hualālai volcano

Live view of the northwest flank of Mauna Loa; the view is from the southeast flank of Hualālai [HLcam]. This camera is a pan-tilt-zoom model and the view may change depending on activity.

Live webcam view of lava erupting from Mauna Loa volcano
[MK2cam] Mauna Loa's Summit and Northeast Rift Zone from Mauna Kea
[MK2cam] Mauna Loa's Summit and Northeast Rift Zone from Mauna Kea
[MK2cam] Mauna Loa's Summit and Northeast Rift Zone from Mauna Kea

Live Image of Mauna Loa's Summit and Northeast Rift Zone from Mauna Kea [MK2cam]. This camera is a pan-tilt-zoom model and the view may change depending on activity.

This image is from a temporary research camera positioned just south of Puʻu ʻŌʻō, looking north at the southern flank of Puʻ
[PScam] Puʻu ʻŌʻō South Flank from the South Rim
[PScam] Puʻu ʻŌʻō South Flank from the South Rim
[PScam] Puʻu ʻŌʻō South Flank from the South Rim

This image is from a temporary research camera positioned just south of Puʻu ʻŌʻō, looking north at the southern flank of Puʻu ʻŌʻō's cone.



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