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Annual Review of Earth and Planetary Sciences

Volume 52, 2024

The 2018 Eruption of Kīlauea: Insights, Puzzles, and Opportunities for Volcano Science

Abstract

The science of volcanology advances disproportionately during exceptionally large or well-observed eruptions. The 2018 eruption of Kīlauea Volcano (Hawai‘i) was its most impactful in centuries, involving an outpouring of more than one cubic kilometer of basalt, a magnitude 7 flank earthquake, and the volcano's largest summit collapse since at least the nineteenth century. Eruptive activity was documented in detail, yielding new insights into large caldera-rift eruptions; the geometry of a shallow magma storage-transport system and its interaction with rift zone tectonics; mechanisms of basaltic tephra-producing explosions; caldera collapse mechanics; and the dynamics of fissure eruptions and high-volume lava flows. Insights are broadly applicable to a range of volcanic systems and should reduce risk from future eruptions. Multidisciplinary collaboration will be required to fully leverage the diversity of monitoring data to address many of the most important outstanding questions.

  • ▪  Unprecedented observations of a caldera collapse and coupled rift zone eruption yield new opportunities for advancing volcano science.
  • ▪  Magma flow to a low-elevation rift zone vent triggered quasi-periodic step-like collapse of a summit caldera, which pressurized the magma system and sustained the eruption.
  • ▪  Kīlauea's magmatic-tectonic system is tightly interconnected over tens of kilometers, with complex feedback mechanisms and interrelated hazards over widely varying timescales.
  • ▪  The eruption revealed magma stored in diverse locations, volumes, and compositions, not only beneath the summit but also within the volcano's most active rift zone.

Keyword(s): basaltic volcanism, caldera collapse, Hawai‘i volcano, magma system, rift zone, tephra eruption
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2024-07-23
2024-10-15
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The 2018 Eruption of Kīlauea: Insights, Puzzles, and Opportunities for Volcano Science
Annual Review of Earth and Planetary Sciences 52, 21 (2024); https://doi.org/10.1146/annurev-earth-031621-075925
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