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December 5, 2022 — Mauna Loa Eruption Map

December 5, 2022
Color map of eruption
The Northeast Rift Zone eruption of Mauna Loa has continued into its eigth full day. One active fissure, fissure 3, is feeding a lava flow downslope to the north. HVO field crews and USGS analysts have accurately mapped some of the most active flows, displayed in red here, along with older flows further uprift, in part of Mokuʻāweoweo Caldera, and in the upper summit region southwest of the caldera. Lava flow length was measured by tracing an active channel from the December 2, 2022, thermal map and then extending the measurement to the distal lava flow extent measured on this morning's overflight.