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Home » News » Innovation » Indian Scientists Solve Mystery of Indian Ocean’s ‘Gravity Hole’

Indian Scientists Solve Mystery of Indian Ocean’s ‘Gravity Hole’

Amit GuptaBy Amit GuptaMarch 12, 2025Updated:March 12, 2025No Comments2 Mins Read
Indian Scientists Solve Mystery of Indian Ocean’s ‘Gravity Hole’
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For decades, scientists have been puzzled by a peculiar gravitational anomaly in the Indian Ocean, known as the Indian Ocean Geoid Low (IOGL). This region experiences a significant dip in sea level—up to 106 meters lower than the global average—due to an unusually weak gravitational pull. Now, Indian researchers have uncovered the reason behind this mysterious phenomenon.

What is the Indian Ocean Geoid Low?

A geoid represents the shape of the Earth if it were covered entirely by oceans, responding only to gravity and rotation. Normally, the Earth’s gravity causes water levels to remain relatively even. However, in the Indian Ocean, an unexpected low-pressure zone has created a depression in sea level, forming what is known as a ‘gravity hole.’

Breakthrough Findings: Why Does This Happen?

Recent research suggests that the IOGL is caused by complex mantle dynamics deep within the Earth. Using advanced computer simulations, scientists have identified two key factors contributing to this gravitational anomaly:

1. Mantle Plumes: The Rising Heat from Earth’s Core

Deep beneath the Indian Ocean, hot, low-density magma plumes are rising from Earth’s mantle. These plumes create areas of lower mass, reducing the gravitational pull in this region and causing the ocean’s surface to dip.

2. India’s Ancient Tectonic Movements

Millions of years ago, the Indian subcontinent moved rapidly northward—faster than any other landmass in Earth’s history. This motion forced massive slabs of oceanic crust deep into the mantle beneath Southeast Asia. These sinking slabs disturbed the African Large Low Shear Velocity Province (LLSVP)—a vast, slow-moving zone of hot rock beneath Africa. This disruption caused the rise of hot material under the Indian Ocean, further weakening gravity in the region.

Why This Discovery is Important

Understanding the IOGL is more than just solving a mystery—it helps scientists:

✔ Improve models of Earth’s internal structure and heat flow
✔ Understand how ancient tectonic shifts continue to shape our planet today
✔ Predict gravitational variations that could impact climate and sea levels

This research is a major breakthrough in geophysics and Earth sciences, offering new insights into the hidden forces shaping our planet.

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Amit Gupta
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Amit Gupta, co-founder and Editor-in-Chief of Indian.Community, is based in Atlanta, USA. Passionate about connecting and uplifting the Indian diaspora, he balances his time between family, community initiatives, and storytelling.Reach out to him at press@indian.community.

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