An Ominous Signal Crossed Earth’s Surface 15 Minutes Before a Volcano Erupted: Imperceptible to Humans - The Daily Galaxy --Great Discoveries Channel

15 minutes before one of the most powerful volcanic eruptions in history, something strange happened. A mysterious wave, imperceptible to human senses, rippled silently across the Earth’s surface. Scientists only discovered it after the disaster struck, lAds Links by Easy Branches
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