Restless Seamounts

While the spectacular Mauna Loa lava flows have been getting all the attention in the last couple of weeks, another volcano is making noise 3,800 miles west of Hawaii. Ahyi, a submarine volcano in the US territory of the Northern Mariana Islands, began erupting underwater in mid-October. Hydroacoustic sensors on Wake Island, 1400 miles away, were the first to pick up the sounds of activity, and data from seismic stations on Guam and a Japanese...

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