Introduction

A uncommon depression namely ' Gravity Hole' which give very low gravity in that region than the rest of our planet is found in Indian Ocean. It is probably due to plumes of magma under the Earth’s "SIAL" layer. Scientist have come to a decession using some supercomputers simulation of 140 million years.

In our planet there are so many low density Gravity Holes. Some of them are recognised and some of them are not well recognised. But the Indian Ocean Geoid Low (IOGL) is the most intense one— It is expanded in over 1.1 million Sq. Miles causing a 328-foot dip in sea level of this great ocean.

A recent study at IISC Bangalore and German Research Centre for Geoscience found the reason. They told that the crust plumes very close to the masses of earth's mantle which are generating the Volcanos may be the reason of this Indian Ocean Low Geoid.

The researchers operated over 19 simulations projects using fastest multidimensional and capable super computers to regenerate the formation look of the seismic of the Earth way back to140 million years, most of them had led to the formation of the IOGL and all of the result suggested that magma plumes exist within the mantle.

These plumes were created by the drifting and the collision of India’s subcontinent with Asian subcontinent started over 20 million years ago as per the source news.

The finding agencies also assumed that this Geoid low was created at about 20 million years ago.

KEY Notes

Earth’s surface is not a smooth Geoid. It is not a perfect sphere too. So there are places with different gravitational pull. Magma outcomes can not create lower gravity automatically.

In the case of the IOGL, the plumes caused a depression in the geoid, which causes a lower gravity. There are few areas in our planet with high gravity like : the Philippines, and the Bahamas.

Unlike other gravitational ambiguity, the IOGL has become unexplained since its discovery in 1948. Although smaller abnormalities can sometimes be traced by thickening or thinning of the Earth’s crust, but in this case there is no such remarks .

The study on the IOGL was influnced and started in 2017, to find the reason and find the roots of the density anomaly. And finally it came from the shifting movement of India’s plate. This research also concludes that there are at least 18 magma plumes in the Earth’s SIAL,. Some of them may be located in Tahiti, East Africa, and the Canary Islands.

Conclusion

Top research institutes in the world found two prolific problems in their study. They were unable to study beyond 65 million years ago where the Indian subcontinent would have been formed, and also this study result clearly shows that the Geoid is different from Earth’s real surface shape.
They also expected that the geoid may disappear or shift in the next few million years.