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Date published: July 13, 2018

Volcano Watch - Many forms of sulfur are found on Kīlauea Volcano

For many Hawaii residents, interactions with Kīlauea Volcano's eruptions is through vog—a hazy mixture of sulfur dioxide gas and sulfate particles. However, sulfur on Kīlauea is not limited to vog components.

Date published: July 5, 2018

Volcano Watch - How does the current activity at Kīlauea caldera stack up against those of other volcanoes worldwide?

We are currently witnessing extraordinary events at the summit of Kīlauea Volcano. For weeks the summit has subsided both in a continuous fashion and in incremental and jolting drops. As Kīlauea is being reshaped before our eyes, how does the current activity compare to similar collapses at other volcanoes in the world, or even to previous collapses at Kīlauea.

Date published: July 5, 2018

29 June 2018 - Volcanic Hazard at the Summit of Kīlauea Update

A guide for understanding current activity and hazards at and around the summit of Kīlauea Volcano, summarizing activity from late April through June 29, 2018, and possible future outcomes.

Date published: June 28, 2018

Volcano Watch - What causes the collapse/explosion events at Kīlauea’s summit?

At the summit of Kīlauea Volcano, Halema‘uma‘u has changed dramatically since early May 2018. As the crater walls and inner caldera slump inward, the depth of Halema‘uma‘u has more than tripled and the diameter has more than doubled.

Date published: June 28, 2018

Frequently Asked Questions about Kīlauea Volcano's summit earthquakes.

These FAQs will help answer some of the most commonly asked questions about the nature of Kīlauea's summit activity and the numerous earthquakes occurring in the area.

Date published: June 27, 2018

29 March 2017—Preliminary Analysis of Hazards at the Kamokuna Ocean Entry

This "Cooperator Report to the U.S. Coast Guard" addresses hazards associated with the Kamokuna ocean entry, active July 2016—November 2017, on KILAUEA's south flank

Date published: June 25, 2018

Saying "goodbye" to one GPS station and "hello" to two more.

On June 18, Hawaiian Volcano Observatory staff said a sad goodbye to a GPS instrument that had faithfully recorded over 95 m (310 ft) of downward motion of the floor of Kīlauea caldera before losing radio contact.

Date published: June 22, 2018

Volcano Watch - Mauna Loa Back to Normal

For more than six months, earthquakes at Mauna Loa have diminished and deformation has slowed, indicating that the volcano is no longer at an elevated level of unrest. On June 21, 2018, the Hawaiian Volcano Observatory (HVO) lowered the alert level from ADVISORY to NORMAL, and lowered the color code from YELLOW to GREEN.

Date published: June 17, 2018

Volcano Watch - Colorful plumes – can we see volcanic gases?

When volcanic gases are released into the atmosphere, resulting plumes sometimes appear to have a faint color. Is this color indicative of a certain gas present? Answering this question requires describing what makes a plume visible in the first place.

Date published: June 7, 2018

Volcano Watch - How to protect yourself from volcanic ash produced by Halema‘uma‘u explosions

Small explosions that produce ashfall from Kīlauea Volcano's summit are not new. However, the mechanism, vigor, ...

Date published: June 1, 2018

Volcano Watch - Kīlauea Volcano: What's new and what's not

With the current activity at the volcano's lower East Rift Zone and summit, it's an understatement to say that Kīlauea has been making worldwide headlines the past month.