Mauna Loa’s Fissure 3 gas plume on November 29, 2022
Mauna Loa’s Fissure 3 gas plume, with rain clouds, as seen from the Saddle Road on November 29, 2022. The orange-brown tint near the vent is due to scattering by aerosols in the plume. The dark gray clouds are a mix of plume with what are called pyrocumulus clouds, or clouds that the volcano itself generated via the intense heating of the air by the erupting fissure. USGS photo by M. Warren.