Map showing Kīlauea south caldera seismicity August 23-25, 2021

Map showing the seismic activity beneath the south part of Kīlauea caldera, within Hawaiʻi Volcanoes National Park, from August 23, 2021, at noon through the same time on August 25, 2021. The earthquake swarm began in that region at around 4:30 p.m. HST on August 23 and continued until the morning of August 25, 2021. Almost 500 earthquakes were detected during this swarm. The map shows earthquake locations, with earthquakes colored by the time that they occurred and their magnitude (see key at bottom of figure). The plots above and below the map show earthquake depth below sea level (0) by longitude (bottom) and depth below sea level (0) by latitude (top), with longitude and latitude lines corresponding to the map. USGS map and plots.