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Coming soon—Volcano Awareness Month and the HVO's centennial celebr...

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The USGS Hawaiian Volcano Observatory (HVO), perched on the rim of Kīlauea Volcano's summit caldera next to the National Park's Jaggar Museum, overlooks the active fuming vent in Halema‘uma‘u Crater. HVO will celebrate its 100th anniversary with an Open House on January 21, 2012. USGS photo.