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Daily updates about ongoing eruptions, recent images and videos of summit and East Rift Zone volcanic activity, maps, and data about recent earthquakes in Hawaii are posted on the HVO website. 

Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and colleagues.

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Volcano Watch — Eruption Enters the 21st Century

Volcano Watch — Eruption Enters the 21st Century

Tomorrow, January 3, marks the 17th anniversary of the ongoing Pu`u `O`o - Kupaianaha eruption. Some readers are too young to remember the eruption in...

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Volcano Watch — Programs at the USGS

Volcano Watch — Programs at the USGS

The staff and associates of the U.S. Geological Survey's Hawaiian Volcano Observatory and Kīlauea Field Station extend a warm and cheerful holiday...

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Volcano Watch — A simple question leads to a big lava flow

Volcano Watch — A simple question leads to a big lava flow

An employee of the Hilo Hawaiian hotel recently called the U.S. Geological Survey's Hawaiian Volcano Observatory and asked about the origin of Coconut...

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Volcano Watch — 'Tis the season to say goodbye to yellowjacket wasps

Volcano Watch — 'Tis the season to say goodbye to yellowjacket wasps

Last week's heavy rains on the Big Island brought an end to one of the worst seasons for yellowjacket wasps around Mauna Loa in more than a decade.
 

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Volcano Watch — Does heavy rain influence eruptions? Maybe

Volcano Watch — Does heavy rain influence eruptions? Maybe

The heavy rain that East Hawai`i experienced this week, particularly on Wednesday night and Thursday morning, suggested the topic for this week's...

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Volcano Watch — A POHA of a different sort

Volcano Watch — A POHA of a different sort

The Saddle Road to Pohakuloa Training Area (PTA) might seem noticeably more worn this month.

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Volcano Watch — Quiet in Kīlauea's caldera, eruption on the east rift zone

Volcano Watch — Quiet in Kīlauea's caldera, eruption on the east rift zone

Here's a question for you trivia aficionados. Since written records began in 1823, what is the longest period of time without an eruption in Kīlauea's...

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Volcano Watch — Kīlauea's south shore is...steep

Volcano Watch — Kīlauea's south shore is...steep

Kīlauea's south slope presents a spectacular drive by motorcar because the highway descends steeply to reach the coastal plain.

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Volcano Watch — Is Mauna Loa older or younger than Kīlauea?

Volcano Watch — Is Mauna Loa older or younger than Kīlauea?

In 1916, Thomas Jaggar, renowned scientist and founder of HVO, wrote, in a foreword to "Hawaiian Legends of Volcanoes" by Westervelt, that "Everything...

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Volcano Watch — Kīlauea's caldera: more than just a hole in the ground

Volcano Watch — Kīlauea's caldera: more than just a hole in the ground

Many visitors come to the summit of Kīlauea, take a quick look into the caldera, say, "Hmmm, that's nice," shrug their shoulders, and move on. All...

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Volcano Watch — Is the world shaking more now than before?

Volcano Watch — Is the world shaking more now than before?

For the past two months, reports of large earthquakes and the havoc they cause seem to be constantly in the news. Earthquakes in Turkey, Taiwan...

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Volcano Watch — A glimpse into the structure of Haleakalā Crater

Volcano Watch — A glimpse into the structure of Haleakalā Crater

At the end of their shield-building stage, the summits of Hawaiian volcanoes commonly have large collapsed areas called calderas. Both Kīlauea and...

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