What is South Korea’s Jindo Miracle, and what happens to the sea during this time?

Twice a year, along the quiet southwestern coast of South Korea, the ocean performs a spectacle so rare and precise that it has earned comparisons with one of the oldest miracles in recorded history – the Biblical story of Moses and the parting of the Red Sea. For a brief window lasting less than an hour, the sea between Jindo Island and its neighbouring islets slowly pulls back, revealing a narrow ribbon of wet sand and rock where moments earlier there had only been water. The villagers, the pilgrims, and the visitors tread on this newly discovered route and walk on the seabed as if the ocean itself has given them temporary permission to do so.This phenomenon is known as the Jindo Miracle, a natural tidal event that turns an ordinary stretch of coastline into one of the most extraordinary walkways in the world.The Jindo Miracle takes place in the waters between Jindo Island and the small islands of Modo and Seodo, which are located off the southwest coast of South Korea in the province of South Jeolla. The distance between the islands is relatively short, about 2.8 kilometres long and 40 metres wide, but under normal conditions, this stretch remains completely submerged. When the tide recedes dramatically, however, a solid pathway emerges across the seabed, linking the islands for a short time before the ocean quietly returns and covers it again.Contrary to appearances, the sea does not “split” in the dramatic sense. Instead, it is triggered by the large tidal difference, which is created by the exact positioning of the sun, moon, and Earth.During certain full and new moon phases in spring and summer, the gravitational force is strong enough to produce low tides in this area. The topography of the Jindo coastline, with its shallow seabed, gentle slope, and narrow channels, enhances this process. As the water flows out of the channel separating the islands, the seabed rises above the water level, creating a land bridge.For 40 to 60 minutes, the sea is separated, leaving a muddy and shell-lined path across the water. When the tide turns, the water flows back in, slowly filling the path and separating the islands again.The accuracy of the process is so precise that it happens only two to three times a year.Legend has it that the villagers ran away from Jindo Island to protect themselves from tigers, leaving behind an elderly woman named Bbyong. She prayed fervently to the sea god, Yongwang, to be reunited with her family. Yongwang told her that the sea would open on a certain day. When that day came, the villagers were able to walk across the sea bed to safety, led by the prayers of the elderly woman. The Jindo Miracle had long been a local secret, known only to the fishing villages in the area, until the 1970s when it received international attention as a result of being mentioned by the French ambassador to South Korea. Shortly after, the government started promoting it as a cultural and natural heritage event.The event is currently marked by the annual Jindo Sea-Parting Festival, which takes place around the time when the tidal road is visible. There are performances of traditional music, folk dances, offerings, and seafood banquets that accompany the crossing, making a scientific wonder a cultural event.Visitors are encouraged to walk the route barefoot and to check out the tidal pools that form along the route before the water rushes back.Walking along the Jindo sea road has to be done at the right time. As soon as the tide starts to come in, the road becomes hidden. Safety officials take a close interest in the process, warning people to leave before the water traps them.The best time to observe the Jindo Miracle is usually between March and June, although this changes every year according to lunar patterns. The times of the tide are announced well in advance so that people can organize their visit accordingly.But aside from its beauty, the Jindo Miracle also offers a glimpse into the cycles that govern the oceans. It is a reminder that, even in the era of satellite imaging and supercomputers, nature still functions with a precision that is nothing short of breathtaking.For the people of Jindo, the Jindo Miracle is more than just a show. It is a tradition that weaves together science, myth, and religion, and is passed down from generation to generation with a quiet sense of pride.For those fortunate enough to be there at the right time, the experience of watching the tide recede and walking along a road that shouldn’t be there is like entering another world, if only for an hour.