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USGS HVO Information Statement—Magnitude-4.5 Earthquake beneath northwest flank of Mauna Kea, Island of Hawai‘i

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.5 earthquake located beneath Mauna Kea's northwest flank on...

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Volcano Watch — Something new from something old: A new Geologic Map of the State of Hawaiʻi

The original purpose of geologic mapping in Hawaiʻi was to understand the distribution of groundwater and soils to support agriculture. But as...

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2021: A year of earthquake activity on the Island of Hawai‘i — Volcano Awareness Month 2022 Seismology Update

The third in a series of recorded talks by HVO staff that will be posted on our website throughout the month of January. These talks are presented as...

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Volcano Watch — How measuring gravity on Mauna Kea helps us monitor Mauna Loa

Gravimeters, essentially extremely precise pendulums, can measure a change in the force of gravity to one-in-one billionth of the force you feel every...

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USGS HVO Information Statement — Magnitude-4.4 Earthquake beneath northwest flank of Mauna Kea, Hawai‘i

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.4 earthquake located beneath Mauna Kea's northwest flank on...

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Volcano Watch — Deep repeating earthquakes beneath Mauna Kea

Mauna Kea volcano hasn't erupted in over 4,500 years, but that doesn't mean it's quiet. In fact, for decades it has been hiding one of the most unique...

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Volcano Watch — Looking for maps? GIS data? Try the HVO publications page!

Many messages to AskHVO (askHVO@usgs.gov) request resources relating to geologic maps and geographic information systems (GIS) data. "Is there a map...

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Volcano Watch — HVO's geological sample collections are an important resource

In the past, HVO would occasionally post images of people collecting lava samples on our website. These photos usually featured a person (with little...

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Volcano Watch — Mauna Loa Volcano's 1935 lava flow seen in current media coverage of Mauna Kea

In ongoing media coverage of demonstrations at the base of Mauna Kea, many hundreds of people can be seen standing on a black lava flow that surrounds...

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How to stay informed about Hawaiian volcanoes

Information about how to stay informed about Hawaiian volcanoes.

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Volcano Awareness Month

January 2019 is Hawaiʻi Island's 10th annual Volcano Awareness Month.

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Volcano Watch - Why do some Hawaii earthquakes occur so far offshore?

Earthquakes in Hawaii are intimately related to the volcanoes. In addition to helping scientists track moving magma, sometimes they happen simply...

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