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Tag: eruptions!

Volcano Watch — How have eruptions shaped Hawaii? Volcano Awareness Month 2025, with a twist
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Volcano Watch — How have eruptions shaped Hawaii? Volcano Awareness Month 2025, with a twist

Volcano Watch  is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates.  From Lēʻahi (Diamond Head) on Oʻahu to the changing caldera at the summit of Kīlauea volcano on the Island of Hawaiʻi, our landscape is shaped by volcanic processes and events. 2024 has been another year of dynamic volcanic activity on the Island of Hawaiʻi, with Kīlauea eruptions occurring outside of Kaluapele (the summit caldera) for the first time since 2018. Multiple intrusions into the upper portions of the Southwest Rift Zone and East Rift Zone culminated in a one-day eruption
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Using Distant Seismometers to Monitor and Analyze Volcanic Eruptions
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Using Distant Seismometers to Monitor and Analyze Volcanic Eruptions

(a) The three closest seismic stations (red inverted triangles) to the Tonga eruption are more than ~760 km (~472 mi) away. (b) The timeline of earthquakes (yellow circles) at the Tonga eruption site shows the increase of seismicity immediately after the M5.8 during the initial eruption, followed by decreasing seismicity after the first couple of weeks. (from Kintner et al., 2022) There are more than 1000 active volcanoes on the planet that are not locally monitored, and some of them are very near potentially impacted populations. One such location is the Tongan capital of Nukualofa, where the only warnings before
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Updated USGS Publication, “Eruptions of Hawaiian Volcanoes—Past, Present, and Future”
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Updated USGS Publication, “Eruptions of Hawaiian Volcanoes—Past, Present, and Future”

In January 1987, the U.S. Geological Survey Hawaiian Volcano Observatory (HVO), then located on the caldera rim of Kīlauea, celebrated its 75th anniversary. To honor this anniversary, the U.S. Geological Survey (USGS) published Professional Paper 1350, a comprehensive summary of the many studies on Hawaiian volcanism by USGS and other scientists through the mid-1980s. Drawing from the wealth of data contained in that volume, the USGS also published in 1987 the original edition of this general-interest booklet, focusing on selected aspects of the eruptive history, style, and products of two of the State of Hawaii’s active volcanoes—Kīlauea and Mauna Loa.
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