August 22, 2025 — USGS staff monitor episode 31 of the eruption at the summit of Kīlauea

With permission from Hawaiʻi Volcanoes National Park, USGS Hawaiian Volcano Observatory staff monitor and document episode 31 of the ongoing eruption at the summit of Kīlauea volcano, which began on August 22. USGS staff use a laser rangefinder to measure the distances lava flows have travelled on Halemaʻumaʻu crater floor, and how and far the lava fountains are extending. USGS photo by M. Patrick.