Map of the Mauna Loa summit region, showing caldera faults and 2022 eruption features

Map of the Mauna Loa 2022 eruptive fissures, shown as red lines. Red shaded area indicates lava flows produced during the eruption, around the fissure vent areas. Solid white line indicates mapped outer caldera boundary. White dotted line indicates inferred outer caldera boundary that is buried by historic Mauna Loa lava flows. Fissures on map were documented by C. Parcheta at USGS; lava flow polygons by USGS National Civil Applications Center.