『Groundbreaking US Geology Discoveries Uncover Hidden Faults, Shifting Plates, and Ancient Connections』のカバーアート

Groundbreaking US Geology Discoveries Uncover Hidden Faults, Shifting Plates, and Ancient Connections

Groundbreaking US Geology Discoveries Uncover Hidden Faults, Shifting Plates, and Ancient Connections

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概要

 In the past week, United States geology news highlights groundbreaking discoveries in tectonics, satellite monitoring, water trends, and ancient connections. Researchers at the University of Colorado Boulder and University of California Davis analyzed small low-frequency earthquakes in the Pacific Northwest, revealing hidden faults at the Mendocino Triple Junction off northern California. According to Science magazine, this hotspot where the North American, Gorda, and Pacific plates converge actually involves five moving pieces, not three. A chunk of the North American plate has broken off and is sinking with the Gorda plate, while the Pioneer fragment of older rock drags underneath. This shifts the plate boundary shallower than models predicted, explaining the 1992 magnitude 7.2 earthquake's unusual depth. Geophysicist Amanda Thomas notes that without understanding these processes, seismic hazard prediction remains challenging, especially near the San Andreas fault and Cascadia subduction zone.

The United States Geological Survey announced a new Landsat Science Team to advance satellite data for Earth surface changes. The USGS January 2026 Landsat newsletter reports that 2025 milestones included the data archive surpassing 200,000 terabytes and celebrations of Landsat 7's legacy, aiding industries in tracking geology worldwide through this NASA-USGS partnership.

USGS Water News from January 9 details thermoelectric power plants as top water users, with trends showing shifts, alongside a national nutrient study indicating progress against pollution despite population growth. The FireALT dataset baselines permafrost thaw post-wildfire in North America, revealing deeper thaw in the first two decades followed by recovery, threatening Arctic infrastructure as warming accelerates.

High Country News on January 23 links Arizona's Meteor Crater to the Grand Canyon, where driftwood high in caves suggests the ancient impact damming the river, uncovering deep time legacies in the West. Wyoming's 3.5 billion-year-old rocks remind us of Earth's constant change.

Worldwide, a G4 severe geomagnetic storm hit January 19 from a coronal mass ejection, per NOAA's Space Weather Prediction Center, while VolcanoDiscovery logged January's largest quake at magnitude 6.5 off Mexico. These events underscore emerging patterns of complex tectonics, climate-driven permafrost shifts, and vast data tools refining US geologic insights.[349 words]

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