An underwater volcanic eruption has been recorded as creating the highest-ever recorded plume. A new study has found the eruption, which occurred in the South Pacific, reached 35.4 miles to become the first to break through the mesosphere, a layer of atmosphere 30 to 50 miles above Earth.Hunga Tonga-Hunga Ha'apai's explosion on 15 January of this year is among the most powerful ever observed. This video shows the eruption, which triggered devastating tsunamis leaving thousands homeless. SWNS