COURTESY USGS This map shows the location of a 4.8 magnitude earthquake on Hawaii island early Tuesday morning. A magnitude 4.8 earthquake shook the southeastern flank of Mauna Loa volcano on Hawaii ...

The Yellowstone Caldera poses a greater risk than Mauna Loa, however, it's not anticipated to erupt for thousands or even tens of thousands of years. The supervolcano, located in Wyoming ...

Geologic mapping has been one of the most fundamental mandates of the U.S. Geological Survey (USGS) since its establishment ...

Over the past century, technological advancements have vastly improved volcano monitoring. One key innovation was the ...

Tiltmeters are a crucial component of the volcanic monitoring network in Hawaii. By detecting subtle changes in ground ...

The U.S. Geological Survey says it has detected an increase seismic activity around Kamaʻehuakanaloa. The underwater volcano ...

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and two of the world's most active volcanoes (Kilauea and Mauna Loa). The best way to see these jaw-dropping sights is with a guided tour, especially if you want to visit more than one island.

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Kamaʻehuakanaloa is a shield volcano similar to the more notorious Kīlauea and Mauna Loa mountains on the Big Island. The underwater volcano rises about 10,200 feet above the ocean floor but ...