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September 25, 2020

Kauaʻi Rapid Response Team Identifies New Rapid ʻŌhiʻa Death

The Kauaʻi Rapid Response Team's recent helicopter surveys detected the presence of virulent fungal pathogens that cause the rapid killing of ‘ōhi‘a trees in two new areas on Kaua'i. The recent Rapid ʻŌhiʻa Death discoveries were along the upper Hanalei valley and along the north side of Powerline Trail.
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May 31, 2020

Scientists Gain ʻStartlingʻ Insight Into 2018 Kīlauea Eruption

Early in the eruption, HVO reported SO2 emission rates of 15,000 t/d (tonnes/day) of SO2- three times the average of the past few years.
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February 19, 2020

Endangered Plant Survives Volcanic Hotspot, But is Challenged by Invasive Species

From the U.S. Geological Survey Hawaiian Volcano Observatory Volcano Watch, a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates.
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January 07, 2020

Scientists Look to Hawaiian Chants For Mention of Past Crater Lakes 

Volcano Watch is a weekly article and activity update written by U.S. Geological Survey’s Hawaiian Volcano Observatory scientists and affiliates.
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December 23, 2019

USGS: Kīlauea, Mauna Loa Activity Remains Normal

Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates. This week’s article was written by HVO geophysicist Sarah Conway. 
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December 13, 2019

Scientists: Volcano Alert Level at Normal

"Neither Kīlauea nor Mauna Loa erupted in 2019, but this period of relative quiet must not lead to complacency about Hawaii’s two most active volcanoes. Both will eventually erupt again."
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November 30, 2019

Geologist Discusses ʻDisturbing Lack of Diversity in Scienceʻ

Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates. Today’s article is by HVO geophysicist Jefferson Chang.
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February 28, 2019

How Do Lava Flows Cool & How Long Does It Take?

This is a difficult question to answer, because the initial eruptive temperatures along with many different factors can influence the rate of cooling.
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December 21, 2018

Volcano Watch: A Field Trip to the Mountain of Water

U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates write about their trip to a restricted area of Hawai'i Volcanoes National Park.
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December 10, 2018

Ninety Days with No Lava, A Milestone for Kīlauea

One of the most frequently asked questions of USGS Hawaiian Volcano Observatory (HVO) scientists over the last several months has been, “Is the eruption over?”
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November 30, 2018

Now is an Exciting Time at Kīlauea

This is, without a doubt, the most intellectually exciting time to be a volcanologist at the USGS Hawaiian Volcano Observatory.
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November 25, 2018

Hawaii Island’s Air Quality Improves

Since the sharp drop in Kīlauea’s volcanic activity and gas emissions in early August 2018, there has been dramatic improvement in the Island’s air quality.
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November 16, 2018

Kīlauea Summit Collapses Have Similarities

U.S. Geological Survey Hawaiian Volcano Observatory scientists discuss historic similarities of Kīlauea summit collapses
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July 05, 2018

What Causes the Collapses/Explosions at the Kīlauea Summit?

The collapse/explosion events generate plumes that have become progressively more ash-poor and now rise only a few thousand feet above the crater. This is in contrast to the eruptive sequence from May 16-26, when the vent within Halemaʻumaʻu crater was open.
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January 13, 2018

Scientists Explain Halema‘uma‘u’s Lava Lake Levels

The lake level is constantly changing, and it fluctuates over many different timescales, from minutes to months.
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