<ul><li>The Hunga Tonga-Hunga Ha'apai (HTHH) volcano had a massive eruption in mid-January 2022, destroying an island, generating a tsunami, and covering Tonga in ash.</li><li>Researchers discovered that the HTHH eruption generated a surface-level seismic wave picked up by detectors 750 kilometers away approximately 15 minutes before the eruption.</li><li>The seismic wave suggests that the oceanic crust beneath the volcano fractured, allowing seawater and magma to mix, triggering the eruption.</li><li>Real-time monitoring of distant seismic signals could provide valuable early warning of future eruptions.</li></ul>

A Seismic Warning for the Tongan Eruption

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