Science Realm on Instagram: "The Indian Ocean Geoid Low (IOGL), or "gravity hole," is a major gravitational anomaly southwest of India, where Earth's gravity is weaker, causing sea levels to dip about 106 meters below average. Spanning 3.1 million square kilometers, it was discovered in 1948. The IOGL likely formed due to the subduction of the ancient Tethys Ocean's crust beneath the Eurasian plate around 20 million years ago, which led to rising low-density magma plumes, reducing the area's mas