『Yellowstone Dominates USGS Top Geological Stories of 2025: Seismic Activity, Geyser Eruptions, and Hydrothermal Wonders Revealed』のカバーアート

Yellowstone Dominates USGS Top Geological Stories of 2025: Seismic Activity, Geyser Eruptions, and Hydrothermal Wonders Revealed

Yellowstone Dominates USGS Top Geological Stories of 2025: Seismic Activity, Geyser Eruptions, and Hydrothermal Wonders Revealed

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 The United States Geological Survey released its top five geological stories from 2025 this week, providing a comprehensive overview of dynamic activity across American volcanic regions. Yellowstone National Park dominated the report with several significant developments. The park experienced 1,136 earthquakes throughout 2025, keeping seismic activity at background levels. Most notably, ground deformation began occurring in July in an area south of Norris Geyser Basin along the north caldera rim, where satellite radar and GPS data detected uplift of two to three centimeters. Scientists note this deformation pattern persisted through the end of the year and may represent a transition to a new form of deformation in the region, similar to patterns observed from 1996 to 2004.

Steamboat Geyser, the world's tallest geyser located in Norris Geyser Basin, erupted only three times during 2025, with the final eruption occurring on December 31st just after ten PM Mountain Standard Time. This continues a declining trend from its peak activity between 2018 and 2020, when it erupted 48 times per year. Scientists expect this phase of activity to continue declining throughout 2026 as the geyser gradually returns to dormancy.

The report also highlighted significant hydrothermal activity across Yellowstone, with several new thermal features emerging throughout the year. In Biscuit Basin, where a hydrothermal explosion occurred in July 2024, new monitoring equipment captured multiple eruptions at Black Diamond Pool. At least three small eruptions were recorded in December alone on the eighth, eighteenth, and twentieth, detected through both camera monitoring and acoustic sensing technology. The USGS emphasized that Black Diamond Pool remains highly active despite its explosive history.

A notable rumor dispelled by the USGS concerned claims that animals were fleeing Yellowstone National Park. Scientists found no credible evidence supporting such migration patterns. The report stressed that Yellowstone remains a geologically dynamic region where features regularly turn on and off, creating natural variations that sometimes fuel unfounded speculation.

In Hawaii, the Hawaiian Volcano Observatory reported that 2025 was a historic year for volcanic activity on the Island of Hawaii. Thirty-eight episodes of lava fountaining occurred at Kīlauea's summit, underscoring the active volcanic landscape residents and visitors navigate throughout the islands. These developments highlight how American volcanic regions continue providing scientists with opportunities to monitor and understand critical geological processes shaping our landscape.

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