August 25, 2023 — GPS survey equipment deployed in Kīlauea south caldera
Scientists temporarily deployed a handful of temporary GPS instruments at established benchmarks in Kīlauea south caldera region to better measure ground deformation during the ongoing unrest there. Steady rates of earthquakes have persisted in this area since August 22. Most earthquakes have occurred at depths of 1–2 miles (2–3 kilometers) below the surface, with no upward migration detected. Summit tiltmeters have tracked slow inflation. USGS photo by A. Ellis.