West vent in Halema‘uma‘u crater—Kīlauea summit eruption

A zoomed-in aerial view of the active west vent in Halema‘uma‘u crater taken during the helicopter overflight on February 9. Lava erupted from the west vent continues to enter the active lava lake through an inlet at the base of the cone. SO₂ emission rates remain elevated and were measured at 2,200 t/d on February 1. USGS photo taken by B. Carr.