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Haleakalā, the volcano that forms East Maui, had higher summit elevations in its glorious past. Today the volcano's highest point is 10,023 feet, but...

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

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

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

On Friday, March 27, 1868, at 5:30 a.m., several whaling ships anchored in Kawaihae Harbor noticed a dense column of fume reflected by a bright light...

Many readers know that the island of Hawai`i is made of five volcanoes—Kīlauea, Mauna Loa, Hualālai, Mauna Kea, and Kohala. 

After an earthquake felt by residents of Hawai`i County, we at the U S Geological Survey's Hawaiian Volcano Observatory are often asked what the...

Earth scientists know a lot about Mauna Loa above sea level but much less about it under water. Studies have naturally focused on the easily...

Among the many tools earth scientists use, the measurement of gravity variations over the earth's surface is one of the most useful for studying...

Imagine this scene: the crew at the Hilo Fire Department receives a call telling them to stand by because an arsonist is setting a fire. If the blaze...