Roundup of Global Volcanic Activity

Ahyi submarine volcano (Marianas): possible new volcanic activity

USGS raised the alert level for the submarine volcano due to abnormal seismicity detected in the area by hydroacoustic devices and land-based network devices on neighboring islands. However, the latter are relatively distant, such as Pagan located 270 km south. The source of the unusual signals that appreaed on 24 April can only be located approximately, and could originate from other seamounts near Ahyi volcano. For the time being, no other indications of possible volcanic submarine activity have been detected.

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