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The eastern portion of the lava lake in Halema‘uma‘u remains solidified at the surface. Numerous islands, previously drifting in the lake currents, are now locked in place. The remnants of a section of Crater Rim Drive, from the 2018 summit collapse, is visible in the lower right corner of the photo. USGS photo taken by M. Patrick on March 2, 2021.

The lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, remains active. Lava is entering the lake at a small inlet along the western lake margin, at the site of the western fissure. Active surface lava remains limited to the western portion of the lake. Scattered crustal foundering and small overflows were present on Tuesday, March 2, 2021. USGS photo by M.

The western fissure in Halema‘uma‘u remains active, with incandescence visible in two small vent openings. The northeastern incandescent vent opening (right) has a narrow, drained lava channel extending down the flank of the cone. USGS photo taken by M. Patrick on March 2, 2021.

Another close-up view of the western fissure in Halema‘uma‘u, showing the incandescent lava upwelling at the inlet zone along the western lake margin. This photo was taken on March 2, 2021, in an area of Hawai‘i Volcanoes National Park that remains closed to the public due to safety reasons. USGS photo by M. Patrick.

Dr. Mark Buckley of the USGS St. Petersburg Coastal and Marine Science Center holds a new Sofar Smart Mooring and Spotter Buoy that will be used to deliver high-fidelity, real-time wave, water level, and wind data.

Photo Contest Winner | March 2021 | Honorable Mention
03363500 Flatrock River at St. Paul, IN; established 1930

Photograph of the Lake Tahoe lakebed near Dollar Point, in March 2021.

Photo of a recently retrieved frost tube during the Snow Depth and Snow Water Equivalent (SWE) measurement. Sleepers River Research Watershed, Danville, Vermont.

Photo Contest Winner | March 2021 | USGS at Work
GEMSC supply distribution day

Woods Hole Coastal and Marine Science Center technicians programming remote field camera installations on Marconi Beach, Cape Cod National Seashore.

Seafloor tripod equipped with oceanographic equipment to be deployed offshore of Sandwich, MA , March 2021

Photo Contest Winner | March 2021 | People
USGS employees on boat

Kent Smith Installing a crest stage gage (CSG) on the Genesee River. (Credit: John Wernly, USGS NY WSC Public domain.)

Adrian Garcia with the effective stress cell in the USGS Hydrate Pressure Core Analysis Laboratory in Woods Hole Coastal and Marine Science Center

On the afternoon of Friday February 26, 2021, the active west side of the lava lake at Halema‘uma‘u, Kīlauea Volcano, Hawaii, had numerous surface breakouts and foundering crust amid vigorous steaming due to the heavy rainfall. This view is looking to the east from the west side of the crater.

Heavy rains at the summit of Kīlauea Volcano (Hawaii) cleared on the afternoon of Friday, February 26, 2021, to show the steaming surface of the lava lake at Halema‘uma‘u viewed from the west.

This map of Halema‘uma‘u at the summit of Kīlauea shows 20 m (66 ft) contour lines (dark gray) that mark locations of equal elevation above sea level (asl). The map shows that the lava lake has filled 218 m (715 ft) of the crater, to an elevation of 735 m (2411 ft) asl since the eruption began at approximately 9:30 p.m. HST on December 20, 2020.

Randy Host preparing to sample discharge and collect water quality samples on an icy Alsek River in winter.