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■ Hidden Earth Part 4 - The Night It Rained Volcanically, Jeju Suwolbong is not well known, but it is included in world geology textbooks. This is because the unique and neatly stacked volcanic ash deposits vividly testify to the day of the volcanic eruption in each time period. When magma meets water, the explosive power increases and volcanic ash flows like smoke and piles up in layers. How big was the explosion? Where is the hydrovolcanic crater? Did the Jeju Saengsu-gwi Paleolithic people 18,000 years ago witness the birth of Suwolbong? Seongsan Ilchulbong, a representative Jeju island, is also a hydrovolcanic volcano that erupted under the sea 6,000 years ago. The little-known secret of the creation of hydrovolcanoes and the day of the volcanic eruption left in the strata. ※ This video is [KBS Grand Project Hidden Earth Korean Peninsula 3 Billion Years - The Night It Rained Volcanically] that aired on March 16, 2023. #Environment #Documentary #KBS