page_title: Hawaiʻi Volcanoes National Park
section_title: Recent events
hierarchical_section_title: Hawaiʻi Volcanoes National Park / Recent events
caption_attribution_description: English: sulfur dioxide emissions from the Halema`uma`u vent, Kīlauea. Français&#160;: Émissions de Dioxyde de soufre dans le cratère Halema`uma`u, sur le Kilauea.
context_page_description: Hawaiʻi Volcanoes National Park, established on August 1, 1916, as Hawaii National Park is an American national park located in the U.S. state of Hawaii on the island of Hawaii. The park encompasses two active volcanoes: Kīlauea, one of the world's most active volcanoes, and Mauna Loa, the world's most massive shield volcano. The park provides scientists with insight into the birth and development of the Hawaiian Islands, and ongoing studies into the processes of volcanism. For visitors, the park offers dramatic volcanic landscapes, as well as glimpses of rare flora and fauna.
  In recognition of its outstanding natural values, Hawaiʻi Volcanoes National Park was designated as an International Biosphere Reserve in 1980 and a World Heritage Site in 1987. In 2012, the park was depicted on the 14th quarter of the America the Beautiful Quarters series.
  On May 11, 2018, the park was closed to the public in the Kīlauea volcano summit area, including the visitor center and park headquarters, due to explosions and toxic ash clouds from Halemaʻumaʻu, as well as earthquakes and road damage. Portions of the park, including the visitor center, reopened to the public on September 22, 2018.
context_section_description: On March 19, 2008, there was a small explosion in Halemaʻumaʻu, the first explosive event since 1924 and the first eruption in the Kīlauea caldera since September 1982. Debris from the explosion was scattered over an area of 74 acres (300,000 m²). A small amount of ash was also reported at a nearby community. The explosion covered part of Crater Rim Drive and damaged Halemaʻumaʻu Overlook. The explosion did not release any lava, which suggests to scientists that it was driven by hydrothermal or gas sources.
  This explosion event followed the opening of a major sulfur dioxide gas vent, greatly increasing levels emitted from Halemaʻumaʻu. The dangerous increase of sulfur dioxide gas prompted closures of Crater Rim Drive between the Jaggar Museum south/southeast to Chain of Craters Road, Crater Rim Trail from Kīlauea Military Camp south/southeast to Chain of Craters Road, and all trails leading to Halemaʻumaʻu, including those from Byron Ledge, ʻIliahi (Sandalwood) Trail, and Kaʻū Desert Trail.
  In mid-May 2018, the Kīlauea District of the park was closed due to explosive eruptions at Halemaʻumaʻu, though the Kahuku District remained open. The Kīlauea District, including the visitor center, reopened to the public on September 22, 2018. Eruptive activity, ground collapses and explosions in the park had ceased in early August. At the summit, seismicity and deformation are negligible. Sulfur dioxide emission rates at both the summit and the Lower East Rift Zone are drastically reduced; the combined rate is lower than at any time since late 2007. Earthquake and deformation data show no net accumulation, withdrawal, or significant movement of subsurface magma or pressurization as would be expected if the system was building toward a resumption of activity.
  As of 2020, the lull in eruptive activity at Kīlauea continues and most of the park is open; however, some road segments and trails remain closed to visitors, while the Jaggar Museum of the Hawaiian Volcano Observatory is closed indefinitely. The Thurston Lava Tube (Nāhuku) was reopened to the public on February 21, 2020. Several large rockfalls were cleared and sensors were installed to monitor new cracks, along with improvements to water drainage and parking. The rockfalls and cracks had been caused by some of the 60,000 earthquakes recorded during the Kīlauea eruption.
caption: Sulfur dioxide emissions from the Halemaʻumaʻu vent, April 2008
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