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A concrete-lined stretch of the Los Angeles River that runs near Sepulveda Dam.  USGS streamgage 11092450 can be seen in the lower left along the river wall. Restoration is planned for this stretch of the river that runs through the San Fernando Valley.

On February 4, HVO geologists observed brief heavy rainfall on the lava lake within Halema‘uma‘u crater at the summit of Kīlauea. The rain flashed to thick white steam as it hit the hot lava surface. The western vent, visible in the lower left, continued to supply lava to the western active portion of the lava lake. USGS photo taken by J.

The GeoEel is a multichannel digital streamer system, with hydrophones in a long, green hose. The streamer is towed in the water from a vessel like a long snake, and the hydrophones "listen" for and record the signals from the seismic sound source.

The Helikite in action, being walked by USGS scientist Chris Sherwood and WHOI scientist Peter Traykovski, the helium powered balloon kite will be used to survey the DUNEX experiment site.

View of the lava lake in Halema‘uma‘u from the western rim of the crater, looking eastward. Volcanic gases emitted from the western fissure obscure the built-up spatter cone. The active western portion of the lake (lower) has a silvery grey color, while the stagnant eastern portion of the lake (upper) is a dark duller grey.

The 26th annual Mineral Commodity Summaries report from the U.S. Geological Survey National Minerals Information Center is the earliest comprehensive source of 2020 mineral production data for the world.

A closer view of the lava lake in Halema‘uma‘u crater from the helicopter. Most of the lake surface in the foreground (east) is solidified on the surface, with active lava limited to the western end of the lake, in the distance. Rockfall debris can be seen on the southern margin of the lake (left side of photo). USGS photo by M. Patrick.

The USGS landslide team monitors and continues to update the hazard map models based on data collected in burn areas. This information improves future models and provides better hazard assessments used by officials for emergency response and decision making. Many of the steep hillsides burned and denuded in California fires repel water rather than soak it in.

Cape Cod National Seashore beach grass

In February of 2021, scientists from the USGS Woods Hole Coastal and Marine Science Center and Woods Hole Oceanographic Institution (WHOI) conducted near-shore bathymetric surveys on Cape Cod National Seashore. Bathymetry is the study of underwater depth of ocean floors or lake floors.

Scientists from the USGS Woods Hole Coastal and Marine Science Center using a helium powered kite-balloon at Head of the Meadow Beach and Marconi Beach, Cape Cod National Seashore in Massachusetts.

Cape Cod National Seashore shoreline

In February of 2021, scientists from the USGS Woods Hole Coastal and Marine Science Center and Woods Hole Oceanographic Institution (WHOI) conducted near-shore bathymetric surveys on Cape Cod National Seashore. 

No major changes were observed at the lava lake in Halema‘uma‘u crater during yesterday's helicopter overflight. Eruptive activity continues from the western fissure, with active surface lava largely confined to the western half of the lake. USGS photo by M. Patrick.

The lava lake within Halema‘uma‘u crater, at the summit of Kīlauea, remains active. An HVO geologist uses a laser rangefinder to measure the elevation of various spots on the lava lake surface. Today (February 2), the active, western portion of the lake was about 213 m (699 ft) deep.

In February of 2021, scientists from the USGS Woods Hole Coastal and Marine Science Center and Woods Hole Oceanographic Institution (WHOI) conducted near-shore bathymetric surveys on Cape Cod National Seashore. Bathymetry is the study of underwater depth of ocean floors or lake floors.

In February of 2021, scientists from the USGS Woods Hole Coastal and Marine Science Center and Woods Hole Oceanographic Institution (WHOI) conducted near-shore bathymetric surveys on Cape Cod National Seashore. Bathymetry is the study of underwater depth of ocean floors or lake floors.