Images

Hawaiian Volcano Observatory geophysicist Ingrid Johanson checks on a survey-mode GPS instrument deployed near the summit of Mauna Loa. This survey will supplement HVO's network of continuous GPS instruments and provide higher spatial density of measurements for how Mauna Loa deformed during the recent eruption.

January 2023 is the Island of Hawaiʻi's 14^th annual Volcano Awareness Month. Presentations about Hawaiian volcanoes will be offered around the Island of Hawaiʻi throughout January 2023. 

As of 7:00 a.m. on December 12, Hawaiian Volcano Observatory geologists observed only residual incandescence and no lava movement in the fissure 3 vent on the Northeast Rift Zone of Mauna Loa. The channels below the vent appear drained of lava and no longer feed the main flow front. USGS image by F. Trusdell. 

The Northeast Rift Zone eruption of Mauna Loa that began the evening of November 27, 2022, continues at greatly reduced levels as of December 12, 2022 (fifteenth full day). Only incandescence was observed within fissure 3 overnight. This morning, field crews heard small explosions accompanied by sprays of spatter from the west end of the fissure 3 vent.

The Northeast Rift Zone eruption of Mauna Loa that began the evening of November 27, 2022, continues at greatly reduced levels as of December 11, 2022 (fourteenth full day). Only incandescence was observed within fissure 3 overnight.

View of fissure 3 the morning of December 10, 2022. As of 7:00 a.m. on December 10, a lava pond replaced the fountains at the fissure 3 vent. The pond fed short lava flows that extended only 1.6 mi (2.6 km) from the vent but are already stagnating. USGS image by K. Mulliken. 

Geologists conducted a monitoring overflight of Kīlauea summit on the morning of December 10, 2022. They noted that the lava lake within Halemaʻumaʻu crater was mostly solidified, though incandescence was visible. USGS image by J. Bard. 

Aerial image of fissure 3 erupting on Mauna Loa's Northeast Rift Zone the morning of December 10, 2022. The eruption output has greatly decreased over the past two days and within the fissure 3 cone, geologists noted a small lava pond rather than a lava fountain. USGS image by K. Mulliken. 

Just days, ago, lava was full in the channels from the fissure 3 eruption on Mauna Loa's Northeast Rift Zone. Over the past two days, the eruption output has greatly reduced. A pond of lava in the fissure 3 cone feeds short lava flows that extended only 1.6 mi (2.6 km) from the vent.

Aerial image of fissure 3 erupting on the Northeast Rift Zone of Mauna Loa. As of 7:00 a.m. today, December 10, a lava pond replaced the fountains at the fissure 3 vent. USGS image by J. Bard. 

The Northeast Rift Zone eruption of Mauna Loa that began the evening of November 27, 2022, continues at reduced levels as of December 10, 2022 (thirteenth full day).

Just days, ago, lava was full in the channels from the fissure 3 eruption on Mauna Loa's Northeast Rift Zone. Over the past two days, the eruption output has greatly reduced. A pond of lava in the fissure 3 cone feeds short lava flows that extended only 1.6 mi (2.6 km) from the vent.

The Northeast Rift Zone eruption of Mauna Loa that began the evening of November 27, 2022, continues as of December 9, 2022 (twelfth full day). One active fissure, fissure 3, feeds lava flows downslope to the north.

Eruptive activity in Mauna Loa's Northeast Rift Zone fissure 3 was dominated by ponded lava inside the fissure that drained to the east into the lava channel system, as viewed here from a monitoring overflight around 10:30 a.m. HST on December 9, 2022. USGS photo by K. Lynn.

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 image by M. Patrick. 

Aerial image of the lava channel issuing from fissure 3, erupting high on the Northeast Rift Zone of Mauna Loa. The reduced lava output at fissure 3 is evident in the low level of lava in the channel. Mauna Kea is visible in the background of the image. USGS image by P. Dotray. 

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 image 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 image by M. Patrick. 

Eruptive activity in Mauna Loa's Northeast Rift Zone fissure 3 was diminished on the morning of December 9, 2022, around 8:20 a.m. HST. This view from a monitoring overflight shows little fountaining activity in the fissure and ponded lava flowing out of the fissure to the east. USGS photo by K. Lynn.

Aerial image of fissure 3 erupting on the Northeast Rift Zone of Mauna Loa on December 8, 2022. The eruption has built up a cone around the vent, which was 98 feet (30 meters) tall on December 7, 2022. USGS image by T. Orr. 

Aerial image of fissure 3 erupting on the Northeast Rift Zone of Mauna Loa on December 8, 2022. Lava fountain heights were very variable on December 8; the fountains were jet like, sometimes spraying at an angle just off vertical and with pulses of activity. USGS image by T. Orr.