Grumbling, rumbling volcanoes signal eruption

Thursday, May 10, 2012 - 11:01 in Earth & Climate

When volcanoes erupt, they create a stunning visual spectacle for anyone watching, but they also emit impressive noises that range from low rumbles to concussive blasts. Some of the sounds are below the range of human hearing, and a new study suggests they can be used to better understand and monitor eruptions.

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