Hawaii Volcano Blog

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.
Friday, May 14, 2021

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.
Tuesday, May 11, 2021

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.
Friday, May 07, 2021

Tiny Changes at Mauna Loa Summit Holds Big Clues

Although Mauna Loa is Earth’s largest active volcano, it has lived in the shadow of Kīlauea since it last erupted in 1984.
Thursday, May 06, 2021

A Look Back: 3 Years Since Kīlauea Eruption Changed Hawai`i Forever

The Puʻu ʻŌʻō collapse marked what scientists at the USGS have since determined was the end of a 35-year eruption that began in 1983.
Friday, April 30, 2021

Volcano Watch: The Rise and Fall of Lava Lakes

May 3 marks three years since the start of the devastating lower East Rift Zone eruption of Kīlauea.
Saturday, April 24, 2021

Volcano Watch: How Measuring Gravity on Maunakea Helps Monitor Mauna Loa

The opportunity to calibrate HVO gravimeters on Mauna Kea provides the ability to design a gravity monitoring program to help understand volcanic unrest at Mauna Loa.
Friday, April 16, 2021

Volcano Watch: Young Activity in Kīlauea’s Southwest Rift Zone

It is no secret that the Island of Hawaiʻi is home to fantastic volcanic features, many of which have been created during eruptions of Kīlauea, Mauna Loa, and Hualalai since 1800.
Friday, April 09, 2021

What’s That (Seismic) Noise?

The USGS Hawaiian Volcano Observatory (HVO) uses dozens of seismometers to locate individual earthquakes and identify signals that are related to faulting and magma movement within our volcanoes.
Saturday, April 03, 2021

Back-to-Back Quakes Shake Same Spot Under Mauna Loa Saturday

The USGS “Did you feel it?” service received over 130 felt reports within the first hour of the earthquake, including one report from Kaua‘i.
Thursday, April 01, 2021

Volcano Watch: The Lava Lakes of Kīlauea Then and Now

One of the most interesting aspects of the current activity in Halemaʻumaʻu is the occasional oozing of lava around the edges of the entire crater while the lava surface is rising.
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