July 16, 2026 — Tephra-blanketed September 1971 spatter cone
July 16, 2026 — Tephra-blanketed September 1971 spatter coneDuring the USGS Hawaiian Volcano Observatory overflight on July 16, scientists flew across Kīlauea's Southwest Rift Zone for measurements of the gas plume drifting downwind of the Halema‘uma‘u eruptive vents.





