1. Aerial view of the northeast rift zone of Mauna Loa Volcano, Hawaii.

2. Atmospheric Baseline Observatories Observatory Operations Barrow, Alaska Mauna Loa, Hawaii American Samoa South Pole

3. The observatory monitored four active Hawaiian volcanoes: Kīlauea, Mauna Loa, Hualālai, and Haleakalā.

4. There are five distinct volcanoes on the island —Mauna Loa, Mauna Kea, Kilauea, Kohala, and Hualalai.

5. Mauna Loa and Kilauea have proved to be among the most active volcanoes in the world.

6. Today Olympus Mons is 1 00 times the volume of Earth's largest volcano, Mauna Loa, located on the Big Island of Hawaii.

7. Mauna Loa should experience about 200 eruptions over the next 1,000 years, and the Old Faithful Geyser will likely cease to operate.

8. The dormant volcano Mauna Kea, at 13,796 feet [4,205 m], is the island’s tallest mountain, just topping Mauna Loa, which rises 13,679 feet [4,169 m].