2022年3月、ポルトガル領アゾレス諸島のサン・ジョルジェ島直下で大規模なマグマの上昇が発生し、数千回に及ぶ地震を引き起こした末に地下で停止した。新たな研究で詳細が明らかになったこの事象は、噴火には至らなかったものの、火山活動への懸念を一時的に高め、その後沈静化した経緯を示すものとなった。
マグマは地下20キロメートル以深から発生し、わずか数日間で急速に上昇した。オリンピックサイズのプール約3万2000杯分に相当する溶岩が含まれていたが、地表から1.6キロメートルの深さで停止し、その影響で島の地表は約6センチメートル隆起した。地震の大部分はマグマの上昇が停止した後に発生し、その活動はピコ・ド・カルヴァン断層帯に集中していた。
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Storm Therese caused precautionary evacuations in Gran Canaria, home flooding in Tenerife, and flight cancellations at Canary Islands airports on Saturday. Prime Minister Pedro Sánchez urged caution and avoiding unnecessary travel. Authorities activated alerts for flooding and rockfalls across several islands.
A massive influx of magma beneath Santorini caused over 28,000 earthquakes in early 2025, according to a new study. Researchers used advanced AI and seafloor sensors to track the molten rock's movement. The findings reveal a previously unknown connection between Santorini and the nearby underwater volcano Kolumbo.
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Researchers have found that the magma reservoir beneath Japan's Kikai caldera, site of the Holocene's largest eruption 7,300 years ago, is refilling with newly injected magma. Using underwater seismic imaging, a team led by Kobe University's Nobukazu Seama mapped the reservoir and linked it to the ancient event. The discovery offers insights into how such systems rebuild after massive eruptions.
A new study reveals that a volcano south of Pavonis Mons on Mars formed through multiple eruptive phases powered by an evolving magma system, challenging earlier assumptions of a single eruption. Researchers used orbital imaging and mineral data to trace the volcano's development. The findings indicate Mars's interior was more active than previously thought.
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Chile's National Seismological Center recorded several earthquakes on Saturday, April 4, with magnitudes from 3.0 to 4.7. The tremors struck northern and southern regions at varying depths. No damage or major alerts have been reported.
The Puracé volcano in Colombia's Cauca department continues to emit ash, leading authorities to keep the alert level at yellow. This status indicates changes in volcanic activity without an imminent eruption. Residents in nearby areas, including Popayán, reported ash fall since May 7.
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Researchers have created the first global map showing how Earth's deepest mantle is deformed, primarily in regions where ancient subducted tectonic slabs reside. Using over 16 million seismograms, the team confirmed patterns predicted by geodynamic models. The findings, published in The Seismic Record, offer new insights into mantle flow near the core-mantle boundary.