Halemaʻumaʻu Crater is a located within the much larger summit caldera of Kīlauea in Hawaii Volcanoes National Park. Halemaʻumaʻu is home to Pele, goddess of fire and volcanoes. Halemaʻumaʻu means “house of the `ama`u fern”.

The crater is currently active, containing a lava lake. The current vent inside Halemaʻumaʻu crater first opened in 2008. Lava is present inside the vent and fluctuates from 20 to 150 meters below the crater floor.

Molten lava in the vent became directly visible for the first time from the Jaggar Museum overlook at the Hawaiian Volcano Observatory when the lava rose to an all-time high level in April of 2015. Lava even spilled over the rim of the Overlook Crater and onto the floor of Halemaʻumaʻu Crater, adding 30 feet (9 m) of fresh lava to the crater floor. The lava lake continues to be visible most days from Jaggar Museum Overlook.

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