Description

Earth’s inner core started doing something strange.
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Deep below your feet, Earth’s solid iron inner core spins differently to the rest of the planet. But scientists have noticed something strange in their measurements. Earth’s inner core came to a halt. Even stranger, it started spinning backwards. What’s going on at the heart of our planet? And what does it mean for us on the surface?



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0:00 Journey to the Centre of the Earth
4:03 Earth’s Missing Mass
6:09 Measuring Earthquakes
12:33 Earth’s Inner Core
17:16 Earthquake Doublets
19:03 70-Year Cycle
21:43 How It Affects Us



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Check out the other Astrum channels for videos about space and astronomy:
Astrum: https://www.youtube.com/@astrumspace
Astrum Extra: https://www.youtube.com/@astrumextra



Astrum Podcast on Spotify: https://open.spotify.com/show/6jPRrbq3o3dpvBb173ZTKi?si=a90d3efe3b704c83



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References:
“Earth’s inner core may have reversed its rotation”, via sciencenews.org https://astrumspace.info/corereversal
“From core to crust: defining Earth’s layers”, via calacademy.org https://astrumspace.info/earthlayers
“Discovery of Earth’s core”, via colorado.edu https://astrumspace.info/corediscovery
“Tectonic implications of the Shillong Plateau earthquake”, via agupubs.onlinelibrary.wiley.com https://astrumspace.info/shillongeq
“Earthquake waves and how they travel through Earth”, via pnsn.org https://astrumspace.info/seismicwaves
“On the constitution of the interior of the Earth”, via geologie.ac.at https://astrumspace.info/oldham1906
“Inge Lehmann and the discovery of Earth’s inner core”, via amnh.org https://astrumspace.info/ingelehmann
“Seismological evidence for differential rotation of the Earth’s inner core”, via columbia.edu https://astrumspace.info/corebacktracking
“Multidecadal variation of Earth’s inner-core rotation”, via nature.com https://astrumspace.info/corevariation
“Inner-core backtracking by seismic waveform change reversals”, via nature.com https://astrumspace.info/corewaveforms



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Credits:
Narrator: James Stewart
Writer: Matt Bone
Video Editor: Matt Jamie
Animator: Peter Sheppard
Researcher: Shourya Shrivastava
Thumbnail Designer: Peter Sheppard
Publishing Lead: Georgina Brenner
Production Manager: Raquel Taylor
Edit Producer: Poppy Pinnock
Producers: Alex McColgan, James Stewart
Head of Astrum: Jess Jordan
Creator of Astrum: Alex McColgan



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#AstrumEarth #Astrum #EarthsCore