Volcano Watch — The Art and Science of Geologic Mapping
Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates. This week's article is by HVO geologist Drew Downs. Examples of Hawaii geologic maps. The lefthand map is a USGS Hawaiian Volcano Observatory map created on September 17, 2024, within hours of remote sensing (helicopter overflight) of the eruption that occurred from September 15–20, 2024. Several age ranges for lava flows of interest are noted by color changes, with those that erupted from 1790–2018 in purple (older lava flows are gray), those erupted on September 15 in pink, and those