Which Is the Largest Active Volcano in the World?

Largest Active Volcano: When we think of volcanoes, we often imagine fiery explosions and towering mountains. But the largest active volcano on Earth is not only massive—it’s also still alive. Located in Hawaii, Mauna Loa is the largest active volcano in the world. Its name means “Long Mountain” in Hawaiian, and that’s a perfect description. It stretches across nearly 50% of the Big Island of Hawaii, rising gradually from the ocean floor to form a gentle, shield-shaped giant.

Where Is the Largest Active Volcano?

Mauna Loa is found in the U.S. state of Hawaii, on the Big Island. Although it stands about 13,681 feet (4,170 meters) above sea level, when measured from its base on the ocean floor, it reaches over 33,500 feet (10,210 meters)—making it taller than Mount Everest! This massive shield volcano covers around 5,271 square kilometers, which is about half of the Big Island.

Is Mauna Loa Still Active?

Yes, Mauna Loa is still active. In fact, it last erupted in November 2022, reminding the world of its powerful presence. Though its eruptions are usually not explosive, they involve fast-moving lava flows that can travel long distances. Scientists closely monitor it because of the potential risks to nearby communities and air traffic.

What Type of Volcano Is It?

Mauna Loa is a shield volcano, which means it has broad, gentle slopes formed by lava that flows easily and spreads widely. Unlike cone-shaped stratovolcanoes (like Mount Fuji), shield volcanoes erupt with lower-viscosity lava that builds up layer by layer, creating enormous landmasses over time.

Fun Facts About Mauna Loa

One of the Most Closely Monitored Volcanoes

Mauna Loa is one of the most studied volcanoes in the world.Scientists use a network of instruments to track its movements and warn of possible eruptions, making it a model for volcanic monitoring worldwide.

Eruption History Goes Back Centuries

Mauna Loa has erupted 33 times since 1843. Its lava flows have shaped much of Hawaii’s landscape and occasionally reached the ocean, creating new land and altering coastlines.

Home to Diverse Ecosystems

From rainforests to barren alpine zones, Mauna Loa’s slopes support many unique habitats. As you climb higher, the climate and vegetation change dramatically, making it a hotspot for biodiversity.

Part of a World Heritage Site

Mauna Loa lies within Hawaiʻi Volcanoes National Park, a UNESCO World Heritage Site. This protected area attracts visitors from around the world to witness its volcanic landscapes and cultural importance.

Taller Than Mount Everest 

Measured from its underwater base, Mauna Loa is over 33,500 feet (10,210 meters) tall. That makes it technically taller than Mount Everest, which only rises about 29,000 feet above sea level.