Mauna Loa, the world's largest active volcano, is the mighty giant of Hawaii that's still bubbling away, waiting to be explored.

Passing by a series of subterranean geological features named cave chocolate, cave bacon and cave popcorn, I start to wonder ...

A key site that monitors global carbon-dioxide emissions went offline for maintenance and will return later Wednesday, according to the National Oceanic and Atmospheric Administration.

With its beautiful beaches, rainforests, volcanic mountains, and lava deserts, the island of Hawaii is the perfect road trip ...

The Pliocene epoch, which lasted from 5.3 million to 2.6 million years ago, was a consequential time in Earth's history. The ...

November 29, 2022 Mauna Loa, the world’s largest active volcano, has started to erupt for the first time in nearly four ...

The colossal Axial Seamount, one of the most active and best-monitored underwater volcanoes in the world, could erupt in a ...

The USGS Hawaiian Volcano Observatory spearheads Volcano Awareness Month each January on the Island of Hawaii. This year, in ...

While severe weather alerts have eased for much of the state following a strong winter storm, the HNN First Alert Weather Team continues the First Alert Weather Day only for Hawaii Island. The Flash ...

Due to ongoing severe weather across Hawaii, numerous schools, businesses, events and parks have closed for the day.