“But the geoid low in the Indian Ocean is one of the most profound gravitational anomalies on our planet.” The gravity hole likely took its current shape about 20 million years ago and will ...

Officially known as “the Indian Ocean geoid low” (IOGL), it is informally referred to as the Indian Ocean gravity hole. At the IOGL, the sea level dips by a staggering 328 feet (100 meters ...

The Indian Ocean geoid low (IOGL) is a 1.2 million-square-mile (3 million square kilometers) depression found 746 miles (1,200 kilometers) southwest of India.