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Visual observations have been a backbone in studies of volcanoes, from 2,000 years ago to now. They remain fundamental to understanding how volcanoes...

Episode 42 of lava fountaining in Halemaʻumaʻu at the summit of Kīlauea lasted for just under 10 hours on February 15, 2026. These maps show lava flow...

Episode 42 of lava fountaining in Halemaʻumaʻu at the summit of Kīlauea lasted for just under 10 hours on February 15, 2026. Both the north and south...

USGS Hawaiian Volcano Observatory scientists use tiny features within crystals in erupted lava to answer big questions about the underlying plumbing...

USGS Hawaiian Volcano Observatory staff participated in a monitoring overflight of Kīlauea summit caldera, Kaluapele, the morning of February 4, 2026.

During Kīlauea summit lava fountaining episode 41, residents and visitors shared their observations of tephra falling via email, phone calls, and on...

Large lava fountains streamed from both the north and south vents reaching heights of at least 1475 feet (450 meters) during episode 41 of Kīlauea’s...

During episode 41 on January 24, lava fountains from the north and south vents in Halemaʻumaʻu at the summit of Kīlauea reached up at least 450 m...

Episode 41 of lava fountaining at the summit of Kīlauea was active for 8 hours and 18 minutes on January 24, 2026. Weak surface winds in combination...

“Volcano Watch” articles over the past two weeks have described past episodic lava fountaining eruptions at Kīlauea Iki (1959) and Maunaulu (1969)...