Lonjakan magma memicu 28.000 gempa bumi dekat Santorini

Inflow magma besar di bawah Santorini menyebabkan lebih dari 28.000 gempa bumi pada awal 2025, menurut studi baru. Peneliti menggunakan AI canggih dan sensor dasar laut untuk melacak pergerakan batuan leleh. Temuan mengungkap hubungan sebelumnya tidak diketahui antara Santorini dan gunung berapi bawah air Kolumbo di dekatnya.

Pada akhir Januari 2025, pulau Santorini dan wilayah sekitarnya di Laut Aegean mengalami aktivitas seismik intens, dengan lebih dari 28.000 gempa bumi tercatat, beberapa melebihi magnitudo 5.0. Ilmuwan dari GFZ Helmholtz Centre for Geosciences dan GEOMAR Helmholtz Centre for Ocean Research Kiel, bersama mitra internasional, merinci penyebabnya dalam studi yang diterbitkan di Nature.

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

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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.

A massive body of magma surged upward beneath São Jorge Island in Portugal's Azores archipelago in March 2022, triggering thousands of earthquakes before stalling underground. The event, detailed in a new study, represented a failed eruption that raised but ultimately eased fears of volcanic activity.

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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.

The National Disaster Management Agency reported one resident killed by a magnitude 6.7 earthquake that struck Central Sulawesi on Tuesday, June 16, 2026.

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A seismic wave that reached Earth's core and bounced back caused a nationwide eastward shift in Japan 15 minutes after the 2011 Tohoku earthquake.

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