Why Do Glaciers Emit Low-Frequency Rumbles Before Calving Events?
为什么冰川在崩解前会发出低频轰鸣声?
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Before large ice chunks break off glaciers, microfractures spread rapidly through stressed ice layers deep below the surface.
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These fractures generate seismic waves below 20 Hz—inaudible to humans but detectable by geophones and infrasound arrays.
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