南極のスウェイツ氷河で、東側の棚氷に大きな亀裂が広がり、分離が進んでいる。この事態は、氷河の流出速度を加速させ、今後数十年にわたって世界的な海面上昇を招く恐れがある。
スウェイツ氷河の東側棚氷は、面積約1500平方キロメートル、厚さ350メートルに及ぶ。衛星観測によると、この棚氷は固定点周辺および氷河が海と接する接地線に沿って急速に亀裂が生じている。氷河の流出速度は2020年1月から3倍に増加し、2026年1月には年間2000メートル強に達した。その後もさらなる加速が確認されている。
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Bright pink granite boulders on Antarctica's Hudson Mountains have unveiled a massive buried granite body beneath Pine Island Glacier. The structure measures nearly 100 km wide and 7 km thick. Researchers linked the rocks, dated to 175 million years ago, to this subglacial feature using gravity surveys.
Antarctica's Hektoria Glacier lost 15 miles of length in just 15 months, marking the fastest retreat of grounded ice observed in modern times. The collapse unfolded between early 2022 and spring 2023 on the eastern Antarctic Peninsula.
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In 2023, Hektoria Glacier on Antarctica's Eastern Peninsula retreated eight kilometers in just two months, marking the fastest such event recorded. Nearly half of the glacier broke apart due to its position over a flat underwater bedrock. The discovery, detailed in a new study, highlights vulnerabilities in other Antarctic ice features.
Gases from hot springs in central Zambia show signs of mantle fluids rising to the surface, suggesting an early-stage continental rift. Researchers say this could mark the start of a new tectonic plate boundary. The findings come from samples collected in the Kafue Rift.
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A major Atlantic Ocean current system that regulates global climate has been slowing down for nearly 20 years. New research provides direct evidence of the decline across a wide area of the North Atlantic.
New data from the European Space Agency's Swarm satellites reveal that the South Atlantic Anomaly, a weak spot in Earth's magnetic field, has grown by nearly half the size of continental Europe since 2014. A region southwest of Africa is weakening even faster in recent years. This expansion highlights unusual activity in Earth's molten outer core.
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A huge landslide in Alaska's Tracy Arm fjord on 10 August 2025 generated the second-largest tsunami ever recorded, with waves reaching 481 metres high. The event displaced 64 million cubic metres of rock and created a 5.4 magnitude seismic signal.