Afflux de magma provoque 28 000 séismes près de Santorin

18 février 2026

Rapporté par l'IA

Un important afflux de magma sous Santorin a causé plus de 28 000 séismes début 2025, selon une nouvelle étude. Les chercheurs ont utilisé une IA avancée et des capteurs de fond marin pour suivre le mouvement de la roche fondue. Les résultats révèlent un lien auparavant inconnu entre Santorin et le volcan sous-marin proche Kolumbo.

Fin janvier 2025, l'île de Santorin et les zones environnantes en mer Égée ont connu une intense activité sismique, avec plus de 28 000 séismes enregistrés, certains dépassant 5,0. Des scientifiques du GFZ Helmholtz Centre for Geosciences et du GEOMAR Helmholtz Centre for Ocean Research Kiel, avec des partenaires internationaux, ont détaillé la cause dans une étude publiée dans Nature.

Articles connexes

Illustration of 7.6 magnitude earthquake aftermath near Bitung, with shaking buildings in Manado, evacuating residents, and rising tsunami waves.

Magnitude 7.6 earthquake hits near Bitung, tsunami warning issued

1 avril 2026 Rapporté par l'IA Image générée par IA

A magnitude 7.6 earthquake struck waters near Bitung, North Sulawesi, on Thursday morning at 06:48 Wita, triggering an early tsunami warning for North Sulawesi and North Maluku. Strong shaking was felt as far as Manado and Gorontalo, resulting in two casualties in Manado. BMKG confirmed the location at 1.25 N, 126.27 E, depth 62 km.

Kikai caldera supervolcano shows signs of magma recharge

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.

Stanford scientists create first global map of mantle earthquakes

20 février 2026 Rapporté par l'IA

Researchers at Stanford University have developed the first worldwide map of rare earthquakes occurring deep in Earth's mantle, rather than the crust. These elusive events cluster in regions like the Himalayas and near the Bering Strait. The study, published on February 5 in Science, identifies hundreds of such quakes and introduces a new method to detect them using seismic waves.

Asie

A 5.7 magnitude earthquake strikes near Java, Indonesia

Science

Mantle plume shaped massive Atlantic underwater canyon

Afrique

Lava flow decreases at Hawaii's Kilauea volcano

Several low-magnitude earthquakes strike Chile on March 23

Chile's National Seismological Center at the University of Chile recorded four earthquakes with magnitudes from 4.1 to 4.5 on Monday, March 23, across various regions. Most were imperceptible due to their depth and Chile's position at the Nazca and South American plates boundary. Senapred recalled basic safety guidelines for earthquakes.

Study uncovers complex magma system under young Mars volcano

23 février 2026 Rapporté par l'IA

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.

Scientists confirm asteroid impact formed Silverpit Crater

New research has resolved a long-standing debate, confirming that the Silverpit Crater beneath the North Sea resulted from an asteroid strike about 43 to 46 million years ago. The impact generated a tsunami over 100 meters high. Led by Dr. Uisdean Nicholson of Heriot-Watt University, the study used seismic imaging and shocked minerals to provide definitive evidence.

Scientists uncover deep-Earth structures shaping magnetic field

5 février 2026 Rapporté par l'IA

Researchers have identified two massive hot rock formations at the base of Earth's mantle that have influenced the planet's magnetic field for millions of years. Located about 2,900 kilometers beneath Africa and the Pacific Ocean, these structures create uneven heat at the core-mantle boundary. The discovery, based on ancient magnetic data and simulations, reveals variations in magnetic stability over vast timescales.

samedi 04 avril 2026 04h18

Afflux de magma provoque 28 000 séismes près de Santorin

Articles connexes

Magnitude 7.6 earthquake hits near Bitung, tsunami warning issued

Kikai caldera supervolcano shows signs of magma recharge

Stanford scientists create first global map of mantle earthquakes

A 5.7 magnitude earthquake strikes near Java, Indonesia

Mantle plume shaped massive Atlantic underwater canyon

Lava flow decreases at Hawaii's Kilauea volcano

Several low-magnitude earthquakes strike Chile on March 23

Study uncovers complex magma system under young Mars volcano

Scientists confirm asteroid impact formed Silverpit Crater

Scientists uncover deep-Earth structures shaping magnetic field

Earthquakes up to 4.7 magnitude strike various parts of Chile on April 4

Phivolcs raises Bulusan Volcano alert to level 1

Scientists develop Jerk signal for early volcano eruption warnings

Magnitude 4.7 earthquake shakes Valle del Cauca

Scientists uncover origins of Antarctica's gravity anomaly

Hektoria Glacier collapses rapidly in Antarctica

Scientists propose solar storms may trigger earthquakes

Moon's contraction uncovers new tectonic ridges

Study debunks overdue earthquake myth in Himalayas

Synchronized volcanic eruptions on Io suggest spongy interior

Ce site utilise des cookies