Hawai'i Volcano Blog
Volcano Watch: Mapping Kīlauea’s Gas Emissions
Over the summer of 2021, USGS Hawaiian Volcano Observatory (HVO) scientists conducted a detailed gas survey of the caldera floor and rim in order to understand the distribution of current emissions.
Eruption? Intrusion? What’s the difference?
HVO explains the difference between an intrusion and eruption following a flurry of activity south of the Kīlauea caldera a week ago.
Volcano Watch: New Kīlauea Summit Intrusion Draws Comparison to Past Activity
Late Monday afternoon, earthquake activity picked up at Kīlauea’s summit.
Kīlauea Update: Earthquake Swarm has Waned
The earthquake swarm that began beneath the south part of Kīlauea caldera, within Hawaiʻi Volcanoes National Park has waned.
Volcano Watch: ‘Ailā‘au—the Largest Subaerial Kīlauea Lava Flow
Kīlauea volcano alternates between periods dominated by lava flows, such as the one we are currently in, and periods of explosive activity.
Volcano Watch: 1790 Was a Bad Year at Kīlauea
More people were probably killed by the 1790 eruption of Kīlauea than by any other eruption in what is now the United States.
Spaceborne Sentinel Keeps Watch Over Hawaiian Volcanoes
Many imaging satellites are polar orbiting, staying closer to Earth’s surface in a low orbit.
VOLCANO WATCH, Under the Radar: Using Weather Stations to Study Kīlauea’s Plume
The water lake in Halema‘uma‘u was 164 feet deep and growing when Kīlauea summit erupted on Dec. 20.
Volcano Watch: Hawaiian Volcanoes are Heavy
As Hawaiian volcanoes erupt and grow, they add more and more weight to the Earth’s surface.
Remembering Mauna Loa’s Eruption in July 1975
Mauna Loa erupted 46 years ago this week, on July 5–6, 1975, in a 20-hour event.
Volcanoes in Canada, Eh?
Happy Canada Day/Bonne Fête du Canada! While some past “Volcano Watch” articles have had a July 4th theme for the USA, this year we’re taking the opportunity to ensure readers know that our neighbors to the north have volcanoes, too — including potentially active ones.
Volcano Watch: Seismic Halfalogues; Earthquakes Only Part of the Conversation
The journey from volcanic repose to a climactic eruption is like a mystery movie that keeps you at the edge of your seat.
New Instrument Measures Lava Lake with Laser
This newly-developed instrument monitors lava lake dynamics with unprecedented resolution.
Campaign season is here! Another Way HVO Tracks Changes on Hawaiian Volcanoes
These yearly campaign surveys help supplement the continuously recording GPS receivers that blanket the Island of Hawai‘i.
Volcano Watch: What Defines an Eruption Pause?
Kīlauea’s recent volcano alert-level change, from Watch to Advisory, has attracted some attention.
VOLCANO WATCH: Pau or Paused? What’s the Difference?
The Halemaʻumaʻu lava lake celebrated its five-month anniversary by doing what we all like to do on our special day, taking a break.
Earthquake Rumbles Under Kīlauea’s South Flank
An earthquake struck beneath the south flank of Kīlauea on Sunday, May 23.
VOLCANO WATCH: New Research Sheds Light on Recent Pāhala Earthquake Swarms
Many people in Kaʻū have noticed the swarm of earthquakes taking place during the past few years.
How Are Lava Levels, Volumes Measured at Kīlauea Summit Lava Lake?
Kīlauea’s summit lava lake in Halemaʻumaʻu is approaching its five-month anniversary on Thursday, May 20, while the water lake that occupied the crater for the previous seventeen months seems like a distant memory.
Volcanoes National Park to Reopen Two Trails Thursday
The Kahuku Visitor Contact Station (VSC) will also reopen Thursday to visitors who recreate responsibly and follow COVID safety guidelines.
