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| Puu ʻŌʻō eruption (1983–2018) | |
|---|---|
| Name | Puu ʻŌʻō |
| Caption | Eruption at Puu ʻŌʻō, Kīlauea, 1983–2018 |
| Location | Kīlauea Hawaiʻi Island, Hawaiʻi County, United States |
| Coordinates | 19°22′N 155°10′W |
| Elevation | 305 m |
| Type | Cone, fissure vent |
| Last eruption | 1983–2018 |
Puu ʻŌʻō eruption (1983–2018) was a long-lived effusive eruption centered on the Puu ʻŌʻō cone on the east rift zone of Kīlauea. It produced voluminous pāhoehoe and ʻaʻā lava flows that repeatedly altered Hawaiian Islands landscapes, reshaped Kīlauea Caldera, and impacted communities such as Kalapana, Lower Puna, and Pāhoa. The eruption attracted international scientific attention from organizations including the United States Geological Survey, National Aeronautics and Space Administration, and universities such as the University of Hawaiʻi at Mānoa.
Puu ʻŌʻō formed on the east rift zone of Kīlauea during the eruption onset in 1983, part of the volcanic activity associated with the Hawaiian hotspot. The rift system connects to features like Māhukona, Puʻuʻōʻō, Mauna Loa, and the Kona District volcanic corridors. Prior eruptions at Kīlauea Iki and Halemaʻumaʻu provided precedent for sustained eruptive behavior studied by institutions including the Hawaiʻi Volcanoes National Park, Smithsonian Institution, American Geophysical Union, and the Geological Society of America.
The eruption initiated from a series of fissures near Napau Crater and evolved into the Puu ʻŌʻō cone, with eruptive phases documented by the United States Geological Survey Hawaiian Volcano Observatory, National Park Service, and researchers from California Institute of Technology. Major events included the 1986 lava channels toward Kalapana Seaview Estates, the 1992 vent migration described in Journal of Geophysical Research studies, and the 2014–2015 collapse episodes that altered summit–rift dynamics linked to Puʻu ʻŌʻō and Mokuʻāweoweo interactions. The 2018 sequence culminated in rift zone intrusion, summit collapse at Halemaʻumaʻu, and lava inundation of Leilani Estates.
Magma erupted from Puu ʻŌʻō represented tholeiitic basalt compositions characteristic of Hawaiian shield volcanism, with geochemical analyses by teams from the Scripps Institution of Oceanography, University of Cambridge, and Max Planck Institute for Chemistry documenting variations in trace elements and isotopes such as strontium and neodymium. Degassing processes monitored by the NOAA and Hawai‘i Department of Health showed high sulfur dioxide flux measured by instruments used by NASA satellites and ground-based spectrometers. Petrological studies cited by Royal Society publications revealed crystal fractionation and magma storage behavior in the Kīlauea summit magma chamber and along the east rift conduit.
Lava flows from Puu ʻŌʻō advanced across Puna District terrain, creating new land where flows entered the Pacific Ocean and generating littoral explosions observed by crews from United States Coast Guard and Hawaiʻi County Fire Department. The flows destroyed settlements including Kalapana and infrastructure such as sections of Chain of Craters Road inside Hawaiʻi Volcanoes National Park. High-resolution mapping by USGS and the National Geospatial-Intelligence Agency used aerial imagery from NOAA National Ocean Service and remote sensing from Landsat and MODIS platforms to quantify areal expansion, flow thickness, and topographic change.
The eruption displaced residents in communities like Kaimū, affected cultural sites significant to Native Hawaiian practitioners and ʻAumakua traditions, and posed public health concerns through vog distributed by prevailing trade winds impacting Hilo, Honolulu, and agricultural zones monitored by the University of Hawaiʻi at Hilo. Economic impacts involved losses in tourism revenues for Hawaiʻi Volcanoes National Park, agriculture in Puna and fisheries near lava entry zones regulated by Hawaii Department of Land and Natural Resources. Emergency responses coordinated with Federal Emergency Management Agency and Hawaiʻi Emergency Management Agency addressed evacuations, sheltering, and infrastructure repair.
Monitoring systems deployed included seismic networks operated by the USGS Hawaiian Volcano Observatory, Global Positioning System stations coordinated with NOAA and University of Hawaiʻi, and gas monitoring by International Volcanic Health Hazard Network protocols. Hazard maps used by Hawaiʻi County planners incorporated lava-flow probability models developed with input from the American Geophysical Union and National Academies of Sciences, Engineering, and Medicine. Public communication channels included alerts from the National Weather Service, advisories issued by the Department of the Interior, and outreach by the Hawaiʻi Volcanoes Observatory to communities, media outlets such as the Honolulu Star-Advertiser, and academic partners.
Puu ʻŌʻō's decades-long activity became a case study for effusive eruption dynamics, rift-zone plumbing, and long-term lava emplacement, informing research at institutions like California Institute of Technology, Massachusetts Institute of Technology, Imperial College London, and the University of Tokyo. The eruption influenced policies at Hawaiʻi County, conservation strategies within Hawaiʻi Volcanoes National Park, and volcanic hazard frameworks used by the International Association of Volcanology and Chemistry of the Earth's Interior. Puu ʻŌʻō remains central in literature published by entities such as the USGS Publications Warehouse, Nature (journal), and Science (journal), and it continues to inform volcanology curricula at the University of Hawaiʻi and research agendas at global observatories.
Category:Kīlauea Category:Volcanic eruptions in the United States Category:Geology of Hawaii