Lonjakan magma tersembunyi memicu gempa bumi di bawah pulau Azores

Kamis, 14 Mei 2026

Dilaporkan oleh AI

Sebuah massa magma dalam jumlah besar melonjak ke atas di bawah Pulau São Jorge di kepulauan Azores, Portugal, pada Maret 2022, memicu ribuan gempa bumi sebelum terhenti di bawah permukaan tanah. Peristiwa yang dirinci dalam sebuah studi baru ini merupakan erupsi yang gagal, yang sempat meningkatkan namun akhirnya meredakan kekhawatiran akan aktivitas vulkanik.

Magma tersebut berasal dari kedalaman lebih dari 20 kilometer di bawah permukaan dan naik dengan cepat hanya dalam beberapa hari. Magma ini mengandung cukup banyak batuan cair untuk mengisi sekitar 32.000 kolam renang berukuran Olimpiade, namun terhenti di kedalaman 1,6 kilometer, yang menyebabkan permukaan pulau naik sekitar enam sentimeter. Sebagian besar gempa bumi terjadi setelah magma berhenti bergerak ke atas, dengan aktivitas terkonsentrasi di sepanjang Zona Patahan Pico do Carvão.

6.9 magnitude earthquake affects northern Chile with epicenter near Calama

Senin, 25 Mei 2026 Dilaporkan oleh AI Gambar dihasilkan oleh AI

A 6.9 magnitude earthquake struck on Monday, May 25 at 17:52 with its epicenter 20 kilometers northeast of Calama. The quake was felt across four northern regions and caused power outages and mining halts.

Scientists confirm deep Utah earthquake from 1979

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.

Scientists discover hidden brakes on pacific fault earthquakes

Sabtu, 16 Mei 2026 Dilaporkan oleh AI

Researchers have identified natural barrier zones on an underwater fault that act as brakes to stop earthquakes from growing larger. The findings come from detailed studies of the Gofar transform fault off Ecuador.

America

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

Asia

Magnitude 5.3 quake jolts Cagayan; aftershocks expected

Asia

6.1 magnitude earthquake strikes off Iwate coast

New model reveals mantle wind fueling Yellowstone supervolcano

Researchers have developed a three-dimensional model showing that a broad eastward-moving mantle wind supplies magma to Yellowstone rather than a deep plume from Earth's core.

California faults reach highest stress in 1,000 years

Kamis, 18 Juni 2026 Dilaporkan oleh AI

A new study finds that tectonic stress along Southern California's San Andreas and San Jacinto faults has reached levels unseen in the past millennium. Researchers identified Cajon Pass as an earthquake gate that could allow a rupture to spread across both systems. The findings, based on a physics-based model, highlight conditions that historically preceded major multi-fault events.

Scientists observe Juan de Fuca plate tearing in Cascadia subduction zone

Scientists have captured the first clear images of a subduction zone breaking apart beneath the Pacific Northwest. The Juan de Fuca plate is splitting into fragments as it sinks under the North American plate. The findings, from a 2021 seismic experiment, reveal a gradual tearing process.

27 Juni 2026 01.49