Katana VentraIP

Indian Ocean Geoid Low

The Indian Ocean Geoid Low (IOGL) is a gravity anomaly in the Indian Ocean. A circular geoid low situated just south of the Indian peninsula, it is the region with Earth's largest gravity anomaly.[1][2] It forms a depression in the sea level covering an area of about 3 million km2 (1.2 million sq mi), almost the size of India itself. Discovered in 1948 by Dutch geophysicist Felix Andries Vening Meinesz as a result of a ship's gravity survey, it remained largely a mystery until May 2023, when the weak local gravity was empirically explained using computer simulations and seismic data.[3]

Gravity anomalies of Britain and Ireland

Ghosh, A., Thyagarajulu, G., Steinberger, B. (2017). "The importance of upper mantle heterogeneity in generating the Indian Ocean geoid low". Geophysical Research Letters, 44, doi:10.1002/2017GL075392.

Singh, S., Agrawal, S., Ghosh, A. (2017). "Understanding deep earth dynamics: A numerical modelling approach". Current Science (Invited Review), 112, 1463–1473.

Ghosh, A., Holt, W. E. (2012). "Plate Motions and Stresses from Global Dynamic Models". Science, 335, 839–843.