A titanic underwater volcano erupted off Tonga in January 2022, sending shockwaves across the globe with ash plumes piercing the sky and tsunamis slamming coastlines worldwide. The Hunga Tonga-Hunga Haapai blast—heard thousands of miles away—was one of the largest volcanic events in a century, revealing unprecedented data on underwater eruptions. Villages were flattened, communication severed, and water supplies contaminated as Tonga struggled to recover. Scientists now analyze satellite and seismic data, uncovering how the caldera collapsed and injected massive water vapor into the stratosphere, possibly altering global weather. This eruption continues to rewrite our understanding of Earth’s raw, powerful forces.

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