March 10, 2023 — December 2020 island tephra at Kīlauea summit
Hawaiian Volcano Observatory geologists visiting Halema‘uma‘u crater floor on March 10, 2023. While there, they visited the island of tephra material that formed in December 2020. The island is a composite of red-yellow oxidized pieces that range from sand size to up to a few feet (about a meter) in diameter. USGS photo by D. Downs.