Hawaii Volcano Blog

Friday, September 24, 2021

Observations and Impacts of the 2017–18 Ambae, Vanuatu Eruption

The island of Ambae, in Vanuatu, is a large basaltic shield volcano that lies along the subduction zone between Fiji and Papua New Guinea in the South Pacific.
Saturday, September 18, 2021

Volcano Watch: How Does HVO Determine Regions Most Threatened by Lava Flows?

Most residents of the Island of Hawaiʻi live on one of four potentially active volcanoes and probably have wondered about the threat of lava flows at one time or another. 
Sunday, September 12, 2021

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.
Saturday, September 04, 2021

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.
Friday, August 27, 2021

Volcano Watch: New Kīlauea Summit Intrusion Draws Comparison to Past Activity

Late Monday afternoon, earthquake activity picked up at Kīlauea’s summit.
Thursday, August 26, 2021

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.
Saturday, August 21, 2021

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.
Friday, August 13, 2021

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.
Friday, August 06, 2021

Spaceborne Sentinel Keeps Watch Over Hawaiian Volcanoes

Many imaging satellites are polar orbiting, staying closer to Earth’s surface in a low orbit.
Thursday, July 29, 2021

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.
Friday, July 23, 2021

Volcano Watch: Hawaiian Volcanoes are Heavy

As Hawaiian volcanoes erupt and grow, they add more and more weight to the Earth’s surface.
Friday, July 09, 2021

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.
Friday, July 02, 2021

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.
Thursday, June 24, 2021

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.
Friday, June 18, 2021

New Instrument Measures Lava Lake with Laser

This newly-developed instrument monitors lava lake dynamics with unprecedented resolution.
Friday, June 11, 2021

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.
Friday, June 04, 2021

Volcano Watch: What Defines an Eruption Pause?

Kīlauea’s recent volcano alert-level change, from Watch to Advisory, has attracted some attention.
Friday, May 28, 2021

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.
Sunday, May 23, 2021

Earthquake Rumbles Under Kīlauea’s South Flank

An earthquake struck beneath the south flank of Kīlauea on Sunday, May 23.
Thursday, May 20, 2021

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.
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