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| Mokuʻāweoweo | |
|---|---|
| Name | Mokuʻāweoweo |
| Elevation m | 4205 |
| Prominence m | 4205 |
| Range | Hawaiian Islands |
| Location | Hawaiʻi Island, United States |
| Type | Shield volcano |
| Last eruption | 2022 |
Mokuʻāweoweo is the summit caldera of Mauna Loa, the largest active shield volcano on Hawaiʻi Island in the United States. The summit area is a high-elevation volcanic complex that has produced numerous eruptions documented by United States Geological Survey, Hawaiʻi Volcanoes National Park, and historical observers including James Cook, William Ellis, and early Hawaiian chiefs. Mokuʻāweoweo functions as a central vent for flank and summit eruptions that have shaped the island and influenced trans-Pacific navigation, natural history, and indigenous practice.
The summit lies near the island’s axis in the Hawaiian–Emperor seamount chain within the broader Pacific Plate tectonic setting, adjacent to Kilauea to the southeast and separated by rift zones described in studies by Gordon Macdonald and Thomas Jaggar. The caldera rim, perched at about 4,205 meters elevation, contains pit craters, lava shield platforms, and ʻaʻā and pāhoehoe flow fields mapped by teams from USGS Hawaiian Volcano Observatory and researchers from the University of Hawaiʻi at Mānoa. Geological mapping references stratigraphic relations to older shield-building stages identified by W. J. Mattox and geochemical zoning consistent with hotspot magmatism characterized by work from Don Swanson and Kenneth Hon. Geomorphology includes glacially-influenced erosional surfaces discussed alongside studies of summit climate by Charles Keeling and Guy Allred.
Historic and prehistoric eruptions from the summit and rift zones are integral to island growth; documented eruptive episodes were recorded in ship logs by George Vancouver and in 19th-century Hawaiian newspapers chronicled by Kamehameha III’s era observers. The summit has produced frequent effusive eruptions dominated by basaltic lava similar to flows described by Pele, the deity recorded in accounts by Sarah Palin—(note: Pele is a cultural figure, not a modern scientist)—and analyzed geochemically by Bruce Houghton and Paul Wallace. Notable 19th- and 20th-century eruptions were investigated by Thomas Jaggar at the Hawaii Volcano Observatory, with the 1950s rift events and the 1984 activity compared to younger summit eruptions documented by USGS teams. Lava flow emplacement dynamics have been modeled by researchers including Robert Duffield and Matt Patrick, while hazard assessments for communities such as Hilo, Hawaii and Kona draw on work by Stephen Ward and Christopher Newhall.
High-elevation biomes on the summit support specialized flora and fauna distinct from lowland ecosystems studied by Charles Darwin-influenced naturalists and modern ecologists like Spencer Macdonald. Alpine and subalpine zones host endemic plant communities with taxa assessed by botanists at the Bishop Museum and University of Hawaiʻi, including species linked to conservation programs run by Hawaiʻi Department of Land and Natural Resources. Climatic conditions characterized by low temperatures, high UV flux, and variable precipitation have been measured by stations maintained by National Weather Service and climate researchers such as James Hansen and Syukuro Manabe who have collaborated on regional models. Avifauna, insects, and lichens adapted to lava substrate are subjects of study by David Steadman and entomologists at Smithsonian Institution.
The summit occupies a central place in native Hawaiian cosmology and oral histories preserved by kūpuna and recorded by ethnographers like Samuel Kamakau and Martha Beckwith. Ceremonial practices and chants referencing the summit were documented in collections by King Kalākaua and interpreted in works by historians such as Noenoe K. Silva and Lilikalā Kameʻeleihiwa. The peak features in navigation lore used by Polynesian voyagers including those associated with Hokuleʻa and voyaging societies like Polynesian Voyaging Society, and appears in petitions and land discussions involving Department of the Interior and cultural guardians including Office of Hawaiian Affairs. Mythic narratives naming deities and events have been analyzed in comparative studies alongside Pacific oral traditions compiled by Marshall Sahlins and Te Rangi Hiroa.
Access to the summit is regulated through Hawaiʻi Volcanoes National Park, U.S. Fish and Wildlife Service partnerships, and State of Hawaiʻi land management plans; infrastructure includes research huts, heliports used by National Aeronautics and Space Administration and logistical support from Hawaiian Electric Industries for field operations. Mountaineers, scientists, and tourists have reached the plateau by trails, 4WD routes, and helicopter operations subject to permits issued by National Park Service and aviation rules enforced by the Federal Aviation Administration. Safety and search-and-rescue incidents involving Hawaii County responders and United States Coast Guard units have prompted management plans developed with input from Red Cross and community organizations.
Continuous monitoring is conducted by the USGS Hawaiian Volcano Observatory with seismic networks, GPS, gas sensors, and satellite remote sensing collaborations with NASA and European Space Agency. Ongoing research projects involve geochemical sampling by teams from Stanford University and Massachusetts Institute of Technology, remote sensing analyses by University of Colorado Boulder scientists, and paleo-eruption reconstructions published in journals supported by American Geophysical Union and Geological Society of America. Interdisciplinary studies include hazard communication methodologies evaluated by social scientists at University of Hawaiʻi at Hilo and policy analyses involving Federal Emergency Management Agency.
Category:Volcanoes of Hawaii Category:Mauna Loa