All articles tagged with #gravity anomaly
Scientists have uncovered new insights into the Indian Ocean Geoid Low, the largest gravity hole on Earth, linking it to mantle processes such as sinking slabs and rising plumes originating from deep within Earth's mantle, which have evolved over millions of years and are influenced by interactions with the African hotspot and mantle structures like the LLSVP.
Scientists have identified the cause of the Indian Ocean Geoid Low, a large gravity anomaly, as deep mantle processes involving ancient subducted slabs and buoyant plumes beneath Africa, which have reshaped Earth's gravity field over the past 20 million years.
This week's science news covers the potential ancient origins of interstellar comet 3I/ATLAS, a mysterious gravity anomaly beneath Africa linked to Earth's deep mantle, AI's capability to design new viruses with potential biosecurity risks, and the record-breaking damages caused by extreme weather events in 2025, highlighting significant advancements and concerns in astronomy, geology, AI, and climate science.
Researchers analyzing data from the GRACE satellites discovered a mysterious gravity signal off the coast of Africa that lasted for about two years, likely caused by a previously unknown geological process involving a phase transformation in Earth's lower mantle, revealing the planet's complex internal dynamics.
Researchers using NASA's GRACE data discovered a 7,000 km gravity anomaly over the Atlantic, potentially linked to a 'geomagnetic jerk' caused by rapid mass redistributions deep within Earth's mantle, possibly at the core-mantle boundary, indicating complex interactions between Earth's interior and magnetic field.
Scientists have been puzzled by the Indian Ocean Geoid Low (IOGL), also known as the "gravity hole," which is a gravity anomaly in the Indian Ocean. New research suggests that the anomaly may be caused by plumes of magma in the Earth's mantle, which were stirred up when the Tethys plate slipped under the Earth's surface and into the mantle as the Indian plate drifted towards Asia. The study provides insights into the origins of this peculiar phenomenon, although predicting the exact geological landscape of the Earth millions of years ago remains challenging.
Researchers from the Indian Institute of Science believe they have discovered the cause of a gravity anomaly in the Indian Ocean. By modeling tectonic plate and global mantle convection over millions of years, they suggest that ancient tectonic plates sinking beneath the ocean have created a plume of hot mantle, which is less dense than the sunken crust. This plume, along with the mantle structure, is responsible for the lower gravity observed in the area.
The Hudson Bay region in Canada has a gravity anomaly, causing people to weigh slightly less than they do anywhere else in the world. The anomaly is caused by missing mass, likely due to events during the last Ice Age, and activity well below the Earth's surface, such as the rising and falling of magma creating convection currents that can drag down continental plates.
The Puerto Rico Trench, the deepest in the Atlantic Ocean, has a gravity anomaly where an object falls faster than it should due to a large "hanging flap" of the Atlantic lithosphere. Geophysicist Peter Molnar proposed this explanation in 1977, estimating the mass and size of the object causing the anomaly. Gravity anomalies occur when an object in free fall accelerates at a rate different from what models of gravity predict for that location.