Images

Photographs from a mallard duck (Anas platyrhynchos) found dead in Idaho, USA.  (A) The lungs are dark red and have multifocal 1-3 mm diameter white to tan nodules disseminated throughout (arrows).  (B) Cut section of the lung showing the nodules within the parenchyma (arrows).

Photomicrographs from a mallard duck (Anas platyrhynchos) found dead in Idaho, USA.  (A) Multiple granulomas (*) with eosinophilic necrotic centers efface the lung. H&E stain.  (B) Granulomas contain many degenerate heterophils and a few multinucleated giant cells (arrows). H&E stain.

This photo, taken at just after 6 p.m. HST on January 19, shows that the western fissure continues to send lava into Halemʻaumaʻu crater through an open channel into the lava lake. The western side of the lava lake has an incandescent surface, while the eastern portion is more crusted over.

The western fissure at Kīlauea's summit continues to send lava into Halemʻaumaʻu crater through an open channel into the lava lake. Around sunset on the evening of January 19, field crews observed a minor collapse event of the spatter rampart on its northern rim and the channel margins at 5:46 p.m. HST.

A close up of the southwest portion of the lava lake within Halema‘uma‘u, just south of the west fissure. The lava lake at Kīlauea's summit is perched, and is contained by a steep levee 2-3 meters (yards) high. USGS photo by M. Patrick.

On the evening of January 17, the vent on the north side of the western fissure in Halema‘uma‘u at Kīlauea's summit activated and seemed to become the dominant vent overnight. This vent is the one on the right in this photo. The vent on the left, which was the dominant vent over the past week, seemed less energetic today. USGS photo by M. Patrick.

A close up of the vent area at the western fissure within Halema‘uma‘u at Kīlauea's summit. The two main vents were exhibiting low fountaining while a small vent in the middle had sporadic, weak spattering. USGS photo by M. Patrick.

Sunlight interacts with volcanic gas from Kīlauea's summit lava lake and western fissure in this late afternoon view. The western fissure has built a spatter cone on the steep walls of Halema‘uma‘u, with lava spilling into the active lake, which forms the lower right portion of the photo.

A closer view of the low fountaining at the western fissure in  Halema‘uma‘u at Kīlauea's summit. The rim of the cone is built from accumulated deposits of spatter, and large chunks of the cone rim were observed to collapse from time to time. USGS photo by M. Patrick

Low fountaining continues at the western fissure, supplying lava to the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea. The vent has formed a spatter cone around the fountaining, with lava spilling into an open channel that plunges into the lake.

Drilling through ice on the Green River.

Mudpot located in the Mud Volcano thermal area of Yellowstone National Park.  This type of thermal feature indicates an acid-sulfate system.

Steam vents along the Yellowstone River near Mud Volcano thermal area, Yellowstone National Park.

Structure 77 (S-77) on the Caloosahatchee River at Moore Haven, Florida.

Hydrologic Technician Alan Cressler holding a bottle containing a sediment sample. Photo taken on the Caloosahatchee River below Structure 77, Moore Haven, Florida.

Hydrologic Technician Alan Cressler loading a bottle into a DH-95 water-quality sampler. Photo taken on the Caloosahatchee River below Structure 77, Moore Haven, Florida

The west vent in Halemaʻumaʻu erupting and building a spatter cone complex, with lava cascades feeding a growing lava lake at Kīlauea summit. USGS photograph from January 11, 2021, by B. Carr.

Around sunset on Saturday (January 9, 2021), a break in the rain allowed HVO scientists to visit and monitor the ongoing eruption in Halema‘uma‘u. The west vent is still actively effusing lava, but outflow into the lava lake is increasingly sluggish, as evidenced by slow-moving crustal plates near the once-vigorous vent outlet.

The arrival of nightfall at Halema‘uma‘u on January 9, 2021, provided a clearer view of ongoing eruptive activity for USGS scientists monitoring the eruption this Saturday evening.

This animated GIF was created from a clip within the original video showing crustal overturning at Kīlauea Volcano in Hawaii. The original video was at 20x the speed of the event, and this animation 4x faster. 

This animated GIF was created from a clip within the original video showing crustal overturning at Kīlauea Volcano in Hawaii. The original video was at 20x the speed of the event, and this animation 4x faster.