March 4 overflight of Kīlauea summit and East Rift Zone

HVO scientists conducted an overflight of Kīlauea's summit the morning of March 4 to document the ongoing eruption. No significant changes were observed—the vent in the northwest wall of Halema‘uma‘u continues to erupt and lava continues to slowly fill the crater. Laser rangefinder measurements from the morning of March 4 indicate that lava has filled about 220 meters (772 ft) of Halema‘uma‘u. Thermal and visual imagery collected during the overflight will be used to derive eruption rates and generate maps which will be posted to the HVO website Kīlauea map page (https://www.usgs.gov/volcanoes/kilauea/maps). USGS image by K. Mulliken on March 4, 2021.