Shield volcanoes are big, broad volcanoes made up of oozy lava flows that erupt from multiple vents. Hawaii's Mauna Loa and Kilauea are both shield volcanoes. Though they don't form a classic cone ...

Yellowstone and Hawaiʻi. These systems a well known for producing large volumes of magma through time and leaving chains of volcanic features in their wake, although they do so in very different ways.

Mauna Loa is the largest volcano on Earth in terms ... of the area of all the other Hawaiian Islands combined. It’s a shield volcano, determined by its broad, sloping sides formed by the ...

one of Hawaii's largest volcano. Aerial view of Mauna Kea and Mauna Loa shield volcanoes at sunset, Hawaii. Aerial view of Mauna Kea and Mauna Loa shield volcanoes at sunset, Kamuela, Hawaii, United ...

From Acadia to Zion, the U.S. has some pretty majestic national parks. Here’s one fun fact about every single one—plus a map so you can see where they all are.

It was one of those perfect late summer days in Alaska. The sun hung high in the sky and cast a warm golden light over the sprawling Kenai Peninsula. Days like that made you forget about the long, ...

The NOAA office in Hilo that supports that carbon dioxide sampling has been flagged for a possible lease cancellation.

The observatory, established in 1956 on the northern flank of the Mauna Loa, is recognized as the birthplace of global carbon ...

The observatory, established in 1956 on the northern flank of the Mauna Loa volcano, is recognized as the birthplace of global carbon dioxide monitoring and maintains the world’s longest record ...

By the end of the day, about 7 p.m. Pacific Standard Time, data from 16 crystals was collected and analyzed. The data, which ...

Several past eruptions were characterized by similar lava fountaining episodes, including at the start of the Puʻuʻōʻō ...

Consider a can of soda. When the can is closed (pressurized), the soda contains dissolved carbon dioxide (CO2). When you open ...