Kilauea

Kilauea is an active shield volcano located on the southeastern part of Hawaii (island), within Hawaii Volcanoes National Park. It is the youngest and most active volcano on the Hawaiian Islands, having erupted nearly continuously from 1983 to 2018 and again from late 2020. As a prominent feature of the Hawaiian–Emperor seamount chain, it is considered one of the most studied and monitored volcanoes on Earth.

Geology and formation

Kilauea is a classic example of a hotspot volcano, formed as the Pacific Plate moves over a stationary mantle plume. It is situated on the southern flank of the much larger Mauna Loa, though it has its own independent magmatic plumbing system. The volcano is composed primarily of basaltic lava flows, characteristic of effusive eruptions that build its broad, low-profile shield shape. Its structure includes a summit caldera containing the active vent Halemaʻumaʻu, as well as two prominent rift zones, the East Rift Zone and the less active Southwest Rift Zone, which extend from the summit. The ongoing activity is fed by the Hawaiian hotspot, which has also created the rest of the Hawaiian archipelago.

Eruptive history

The documented eruptive history of Kilauea spans several centuries, with oral histories from Native Hawaiians describing long-term activity. The first written accounts by Westerners began with the missionary William Ellis in 1823. A major event in 1790 was a violent phreatomagmatic eruption that killed part of a Hawaiian army. The 20th century saw numerous significant eruptions, including the long-lived Mauna Ulu eruption from 1969 to 1974. The most destructive eruption in recent history began in 1983 from the Puʻu ʻŌʻō vent on the East Rift Zone, which continued for 35 years, devastating communities like Kalapana and Kapoho. This period ended in 2018 with a dramatic sequence of events in the Puna District that destroyed hundreds of homes. Renewed summit activity commenced in December 2020.

Volcanic activity and hazards

Typical activity at Kilauea includes the effusion of fluid pāhoehoe and ʻaʻā lava flows, lava fountain episodes, and persistent lava lake activity within Halemaʻumaʻu. Primary hazards include lava flows that can inundate infrastructure and property, as seen during the 2018 Leilani Estates eruption. Volcanic gas emissions, particularly sulfur dioxide, create vog (volcanic smog) that impacts air quality across the Hawaiian Islands. Other potential hazards include ground cracking and collapse, occasional explosive activity driven by water-magma interaction, and minor tsunami threats from coastal landslides. The volcano's frequent eruptions provide a natural laboratory for studying basaltic volcanism.

Cultural significance

In Hawaiian religion, Kilauea is considered the sacred home of Pele, the goddess of fire and volcanoes. The Halemaʻumaʻu crater is traditionally viewed as her primary residence. Numerous heiau (temples) and other cultural sites are located within its landscape, and the volcano features prominently in Hawaiian chants and oral histories. The area is managed with deep cultural sensitivity by the National Park Service in collaboration with kamaʻaina and cultural practitioners. Eruptions are interpreted by many as manifestations of Pele's activity, and the removal of volcanic rocks is considered culturally disrespectful.

Monitoring and research

Kilauea is one of the most intensively monitored volcanoes in the world, primarily by the United States Geological Survey's Hawaiian Volcano Observatory, founded at its rim in 1912 by Thomas Jaggar. The observatory employs a vast network of instruments including seismometers, GPS stations, tiltmeters, gas sensors, and satellite-based InSAR to track magma movement and deformation. This data is critical for hazard assessment and public warnings. Continuous research by institutions like the University of Hawaii at Manoa has fundamentally advanced the understanding of hotspot volcanism, eruption dynamics, and volcanic gas geochemistry.

Category:Volcanoes of Hawaii Category:Hawaii Volcanoes National Park Category:Active volcanoes