5+ hour, 28+ min ago  (322+ words) The Yellowstone Volcano Observatory is turning 25 years old!" Surprisingly, the seeds for the observatory were planted at Lassen Volcanic National Park, almost 1, 000 miles to the southwest. Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the…...

4+ day, 8+ hour ago  (152+ words) This annotated photo was taken at 6: 24 p. m. HST on May 14, 2026, from the south rim of Halema'uma'u crater and looks north during episode 47 of lava fountaining at the summit of K'lauea on May 14, 2026. Only north vent produced a lava fountain, and associated…...

1+ week, 8+ hour ago  (315+ words) In mid-to late April 2026, Michigan and Wisconsin faced one of the wettest springs on record, as rapid snowmelt combined with sustained, record'breaking rainfall produced widespread flooding across rivers and streams. As soon as conditions allowed, USGS field specialists mobilized to…...

3+ day, 15+ hour ago  (100+ words) During episode 47 of the K'lauea summit eruption that took place for 9 hours on Thursday May 14, the north vent fountains reached maximum heights of under 300 meters or 1, 000 feet. In this photograph, taken from U'kahuna overlook in Hawai'i Volcanoes National Park, a…...

4+ day, 12+ hour ago  (152+ words) USGS (. gov) Official websites use. gov Secure. gov websites use HTTPS Mount Baldy Wilderness sign, AZ - Reproduce up to 500, 000 copies of the asset in all media, including product packaging, printed marketing materials, digital documents, or software. - Include the asset in…...

6+ day, 8+ hour ago  (141+ words) USGS (. gov) Both surface water and groundwater provide critical water supplies across the United States. In surface-water limited regions, users turn to groundwater to meet water demand. But water above and below the ground can be closely connected. Is groundwater…...

5+ day, 15+ hour ago  (27+ words) USGS (. gov) Official websites use. gov Secure. gov websites use HTTPS May 12, 2026 " "nuenue in Halema'uma'u...

5+ day, 18+ hour ago  (124+ words) The USGS Hydrologic Imagery Visualization and Information System (HIVIS) now has more than 1, 000 active webcams providing remote visibility of current water conditions. This real-time imagery supports water science and public safety nationwide. Picture your favorite stream. What does a gage…...

1+ week, 10+ hour ago  (198+ words) Mike Stickney was a one-person earthquake hazards show in Montana for 45 years and a valuable contributor to the Yellowstone Volcano Observatory. "His retirement in 2025 is a good excuse to celebrate his understated yet impactful career. Yellowstone Caldera Chronicles is a…...

1+ week, 5+ day ago  (67+ words) USGS (. gov) This timelapse video shows K'lauea summit eruption lava fountaining episode 46 on May 5, 2026, captured by a USGS Hawaiian Volcano Observatory research camera on the south rim of the caldera. Although both vents erupted precursory lava flows, only the north…...