Un flujo de magma oculto provocó terremotos bajo una isla de las Azores

Una enorme masa de magma ascendió bajo la isla de São Jorge, en el archipiélago portugués de las Azores, en marzo de 2022, lo que desencadenó miles de terremotos antes de detenerse bajo tierra. El suceso, detallado en un nuevo estudio, representó una erupción fallida que aumentó, pero finalmente disipó, los temores sobre actividad volcánica.

El magma se originó a más de 20 kilómetros bajo la superficie y ascendió rápidamente en tan solo unos días. Contenía suficiente roca fundida como para llenar aproximadamente 32,000 piscinas olímpicas, pero se detuvo a una profundidad de 1.6 kilómetros, lo que provocó que la superficie de la isla se elevara cerca de seis centímetros. La mayoría de los terremotos ocurrieron después de que el magma dejara de ascender, concentrándose la actividad a lo largo de la zona de falla del Pico do Carvão.

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