2. An ocean on fire. Entire islands that rise into the air. Billions of tons of seawater that pour in and out of every cove, bay, and sound all up and down the entire coast — not once a year, not once a month, but twice each day?
3. Seismic sounds are too low for us hear. The vibrations create frequencies that are too low and wavelengths that are too long to be recognized by our ears. Deep Earth Sounds Surface Waves This Bubbling Earth