Seismology
Researchers have verified a rare deep earthquake that struck beneath Utah in 1979 at a depth once thought impossible for such events under continents. New analysis of old data and a 2025 quake support the existence of continental mantle earthquakes.
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A 6.9 magnitude earthquake in Chile was felt by residents in São Paulo and Greater São Paulo on Monday evening (25). The tremor struck at 6:52 p.m. Brasília time at a depth of 101.3 km.
On November 20, 2025, three consecutive microearthquakes struck Naucalpan in Mexico state and were felt in parts of Mexico City. The tremors, with magnitudes between 1.6 and 2.5, occurred in the afternoon and led to evacuations in some offices. No major damage has been reported so far.
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Scientists have proposed a new model for two massive structures deep inside Earth, suggesting they formed from core material leaking into the mantle billions of years ago. This process may have influenced Earth's habitability by preventing strong chemical layering after its ancient magma ocean phase. The findings, published in Nature Geoscience, link these features to the planet's unique evolution compared to Venus and Mars.