Strange Gravity Anomaly Discovered Near Africa May Be The First of Its Kind
Rapid Deep Earth Gravity Anomaly Points to Mineral Phase Change
Understand how twin satellites measured a massive, decade-old gravity signal originating from 3,000 km deep. Learn why this rapid deep-Earth event challenges previous assumptions about mantle stability and links to the magnetic field.
Short Summary
- [00:05:59] Scientists analyzed an unexpected, large-scale gravity signal from 2006-2008 that standard surface models could not explain.
- [00:07:10] The source points to a rapid mineral phase transition, likely of bridgmanite, near the core-mantle boundary (D layer).
- [00:09:16] This deep mass redistribution appears temporally linked to a sudden shift in the Earth’s magnetic field (geomagnetic jerk).
- [00:12:31] Comparing Earth data to the Moon's static anomalies (Mascons) highlights Earth’s highly dynamic interior processes.
This discussion details the discovery of a massive gravitational event missed for years. We explore the technology used to measure these subtle shifts and explain how scientists traced the signal back to extreme density changes within the solid mantle, offering a rare glimpse into rapid deep-Earth dynamics.
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Top Comments (10)
If there is a national award for science communication I would vote for you to receive it!
Don’t tell me it’s not aliens anton. Just for once just, let’s pretend it’s aliens. Let me have this one bro. P.s you are a wonderful person to. edit: I’d just like to add that these measurements are also used to build a geoid model of earth and is essential for measuring height above the ocean with gps. Like anton says these forces aren’t big, but they will affect the ocean level. This gravity difference actually leads to a delta of 200 meters between the geoid highest point and its lowest!!
No Anton, you are a wonderful person. Really.
I'm NOT a wonderful person. I just hid behind my house for 5 minutes to avoid greeting the neighbor.
I didn’t even understand the gravity of the situation. Thank you 🙏🏻 ❤
I'm 64 and still learning new things about the world. Thank you for what you do.
Funny coincidence there are Rivers named Katanga that flow into both the Tunguska Magnetic Anomaly in Siberia and also flow into the Bangui Anomaly in Africa.
Thanks for providing us daily existential crises.
You are a wonderful person, truly
What da math :D Been here 8 years now
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Top Comments (10)
If there is a national award for science communication I would vote for you to receive it!
Don’t tell me it’s not aliens anton. Just for once just, let’s pretend it’s aliens. Let me have this one bro. P.s you are a wonderful person to. edit: I’d just like to add that these measurements are also used to build a geoid model of earth and is essential for measuring height above the ocean with gps. Like anton says these forces aren’t big, but they will affect the ocean level. This gravity difference actually leads to a delta of 200 meters between the geoid highest point and its lowest!!
No Anton, you are a wonderful person. Really.
I'm NOT a wonderful person. I just hid behind my house for 5 minutes to avoid greeting the neighbor.
I didn’t even understand the gravity of the situation. Thank you 🙏🏻 ❤
I'm 64 and still learning new things about the world. Thank you for what you do.
Funny coincidence there are Rivers named Katanga that flow into both the Tunguska Magnetic Anomaly in Siberia and also flow into the Bangui Anomaly in Africa.
Thanks for providing us daily existential crises.
You are a wonderful person, truly
What da math :D Been here 8 years now