It’s classified as a shield volcano and is considered one of the most active volcanoes period. The name actually means spewing and has been almost constant since 1983.
It is said that Pele the Hawaiian Volcano Goddess also known as the creator and destroyer makes her eternal home at the Halema’uma’u Crater of the Volcano.
Having been designated a National Park in 1916 and a World Heritage Site in 1987 the area is a popular spot right now however please heed the local authorities if you have to travel into the area.
You can find more information at bigislandnow.com