#Geodynamo
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scienceetonnante.com
Nouvelle vidéo ! LES MYSTÈRES DU CHAMP MAGNÉTIQUE TERRESTRE. Pour mieux comprendre son origine et pourquoi il s’inverse parfois, je suis allé à la rencontre des chercheurs de l’équipe Géodynamo du laboratoire ISTERRE

youtu.be/TEp_9-ycjdI
Les MYSTÈRES du Champ Magnétique Terrestre
YouTube video by ScienceEtonnante
youtu.be
March 14, 2025 at 4:05 PM
statuslink.bsky.social
Geodynamo Mystery - Inside Earth’s Restless Core: Geomagnetism? Churning iron outer core powers the #geodynamo creates our protective #magnetic field, and why subtle shifts - like field weakening and past magnetic reversals matter. #Geomagnetism.
youtu.be/8n8NsDaPx-A
statusl.ink/geodynamomys...
Geodynamo Mystery: Inside Earth’s Restless Core
YouTube video by Soup Sets
youtu.be
March 3, 2026 at 6:29 AM
scienceetonnante.com
Et retrouvez également l’interview complète sur ma chaîne secondaire (créée pour l’occasion !) 
youtu.be/ZvYnybLQRWQ
Simuler la géodynamo : l'interview de Nathanaël Schaeffer
YouTube video by ScienceEtonnante2
youtu.be
March 14, 2025 at 4:06 PM
coreyspowell.bsky.social
If you could see our planet's inner magnetism, it would look like this geodynamo simulation. Turbulence in the outer core (red/blue) changes the field (orange).

Abrupt changes down there create noticeable "jerks" in the magnetic field that we experience up top. 🧪

www.esa.int/Applications...
Earth’s core as modeled in the numerical geodynamo simulation as part of research into geomagnetic jerks and rapid hydromagnetic waves published as the cover story in Nature Geosciences, May 2018. The magnetic field lines (orange) are stretched, twisted and folded by the turbulent convection producing shear of electrically conducting fluid (red and blue). Hydromagnetic waves are triggered when the shear is misaligned with field lines, and propagate along these lines to the surface of the core where they can focus and cause geomagnetic jerks.
May 25, 2026 at 1:50 PM
brandontbishop.bsky.social
Pigeons' use their livers to sense variations in the geodynamo of the Earth's Core.

That is what this is on one level saying.
science.org Science Magazine @science.org · May 28
Researchers have identified superparamagnetic macrophages in the livers of rock pigeons to be crucial for magnetic sensing. The finding uncovers an unexpected role for immune cells in sensory perception and may fundamentally change our understanding of animal navigation.

https://scim.ag/4nTQ3nq
How animals sense Earth’s magnetic field is one of biology’s enduring mysteries. Researchers have now identified superparamagnetic macrophages in the livers of rock pigeons (Columba livia) to be crucial for magnetic sensing. The finding uncovers an unexpected role for immune cells in sensory perception and may fundamentally change our understanding of animal navigation. Photo: Andreas Teichmann/laif/Redux
May 28, 2026 at 8:33 PM
xanindigo.bsky.social
the fact that Earth's outer core is liquid is the reason why our planet has a magnetic field. Earth's core is made of a molten mix of nickel and iron, and the convection in it causes a flow of charge. the result is a geodynamo, generating magnetism that keeps us safe from hazardous cosmic particles
elabarts.bsky.social Elena Hartley | Science Illustrator @elabarts.bsky.social · Mar 17
I've always been fascinated by Earth's interior and how scientists have described their textures. I decided to make my own slice while at @newsela.bsky.social. #geology, #earth, #platetectonics

🧪
A graphic illustrating the different layers of Earth and their theorized textures. The inner core is solid. The outer core flows like honey. The mantle is a softer solid. The Asthenosphere is a putty-like solid. The lithosphere is a crumbling solid.
April 5, 2025 at 12:09 PM
natureportfolio.nature.com
A study in Communications Earth & Environment show that the transfer of ions from Earth’s atmosphere to the Moon is efficient only in the sustained presence of a geomagnetic field, suggesting that lunar soils may record the histories of the atmosphere, solar wind, and geodynamo. 🔭 ⚒️ 🧪
Terrestrial atmospheric ion implantation occurred in the nearside lunar regolith during the history of Earth’s dynamo - Communications Earth & Environment
Numerical simulations reveal that the transfer of ions from Earth’s atmosphere to the Moon is efficient only in the sustained presence of a geomagnetic field, suggesting that lunar soils may record the histories of the atmosphere, solar wind, and geodynamo.
go.nature.com
December 23, 2025 at 5:36 PM
zimmermanv66.bsky.social
share.google/bvmcO1U5lSqd...
The far side of the moon provides clues to a past magnetic field
Unlike Earth, the moon no longer has a core-generated magnetic field. On our planet, the movement of liquid iron in the outer core generates a global magnetic field. This so-called geodynamo works on ...
share.google
September 25, 2026 at 11:55 AM
castelvecchi.bsky.social
Not only could geomagnetism influence what happens on the Earth's surface — the converse could also be true: The structure of the crust could feed back on convection in the Earth's core, affecting the 'geodynamo' that produces the magnetic field 🤯
www.nature.com/articles/d41...
Mysterious link between Earth’s magnetism and oxygen baffles scientists
Earth’s magnetic field seems to correlate with conditions that helped complex life to thrive — a discovery that could aid the search for life on distant exoplanets.
www.nature.com
June 16, 2025 at 2:23 PM
trans.bsky.social
i do appreciate how strange and esoteric pepsi’s brand strategies are. straight up arcane diagrams & glyphs & stuff.
BREATHTAKING Creation of Identity: Dynamic Forces A. The Earth's Geodynamo naturaly and suit insecte an sala in tic fiendion A. The Pepsi Globe B. Magnetic Fields Magnetic fields exert forces on inner and outer surfaces of the Earth. B. Pepsi Energy Fields Symmetrical energy fields are in balance.
August 9, 2024 at 5:17 AM
nature.com
Nature research paper: Invariance of dynamo action in an early-Earth model

go.nature.com/46xGWSJ
Invariance of dynamo action in an early-Earth model - Nature
Early-Earth geometry models are presented, producing magnetic field intensity and morphologies agreeing with palaeomagnetic data in the deep past and demonstrating the negligible role of fluid viscosity in the Earth’s early geodynamo.
go.nature.com
August 4, 2025 at 2:56 PM
loki.moe
I'll have whatever drugs they were taking please
The Earth's Geodynamo next to The Pepsi Globe Magnetic Fields next to Pepsi Energy Fields Magnetic Dynamics next to The Pepsi Globe Dynamics a diagram showing the gravitational pull off pepsi in a shopping aisle
August 9, 2024 at 5:51 AM
astrodoc.bsky.social
The Earth's magnetic field is generated by vigorous convection in the outer core through a process called the geodynamo. We simulate this process on big supercomputers and can reproduce a lot of the features of the Earth's magnetic field!
🧪⚛️⚒️⛰️🌏
Picture shows the Earth's surface as transparent and cut-out from 0 to 90 deg longitude. Inside is shown convecting outer core colored with temperature. The whole picture has magnetic field lines going through tracing roughly a dipole on the outside and complex shapes inside the outer core where dynamo generation takes place.
August 21, 2026 at 12:23 AM
goat.sex
people rightly mocked pepsico for spending a million dollars on that late night cocaine induced marketing doc from the mid 2000s

but honestly, all this time later, whenever i see a pepsi or think of logo design, i am reminded of the majesty of the document

so perhaps it was worth it in the end
part of a 2008 marketing doc for pepsico about the pepsi logo redesign, inexplicably relating the pepsi "globe" to earths geodynamo and magnetic fields part of a 2008 marketing doc for pepsico about the pepsi logo redesign, inexplicably comparing light traveling through the curvature of time and space with noticing pepsi in a shopping aisle
March 26, 2025 at 1:30 PM
stevenjgibbons.bsky.social
New #OpenAccess paper in RAS Techniques and Instruments #RASTI in final format now. "A set of codes for numerical convection and #geodynamo calculations" - convection and magnetic field generation in rotating fluid-filled spherical shells.
doi.org/10.1093/rast...
New #OpenAccess paper in RAS Techniques and Instruments #RASTI in final format now. "A set of codes for numerical convection and #geodynamo calculations" - the kinematic dynamo, onset of thermal convection, boundary-locked convection, non-magnetic convection, and the full geodynamo problem: magnetic field generation in rotating fluid-filled spherical shells. https://doi.org/10.1093/rasti/rzad043
September 19, 2023 at 6:02 AM
y0.bot
leaked GDD for Super Pepsiman Galaxy
screenshot from the infamous Pepse rebrand design document. there are 4 figures. At top left, "A: The Earth's Geodynamo. A naturally occuring electric generator in fluid motion generates and sustains the Earth's magnetic field." shows a cutaway view of layers of the Earth's crust and core, with illustrations of the magnetic fields created by the layers. At top right: "A: The Pepsi Globe" is just colored outline of the Pepsi logo. At bottom left: "B. Magnetic Fields. Magnetic fields exert forces on inner and outer surfaces of the earth." it is a picture of the Earth centered around the Atlantic ocean equator line, with geomagnetic poles labeled, and arcing arrows of field lines moving from south to north. At bottom right: "B. Pepsi Energy Fields. Symmetrical energy fields are in balance." This is the Pepsi logo outline again, but with a bunch small and large circular field arrows doing.... something, and thicker up-down arrows between the halves of the Pepsi logo where the central white band would be (only the red and blue halves are lined and colored).
August 7, 2026 at 3:13 AM
comraderobot.bsky.social
that’s not very pepsi branding strategy of them
page from famously unhinged pepsi branding pdf: “BREATHTAKING Creation of Identity: Dynamic Forces A. The Earth's Geodynamo A naturally occurring electric generator in fluid motion generates and sustains the Earth's magnetic field. A. The Pepsi Globe mantie B. Magnetic Fields Magnetic fields exert forces on inner and outer surfaces of the Earth. B. Pepsi Energy Fields Symmetrical energy fields are in balance. C. Magnetic Dynamics Magnetic field are impacted by sun radiation and wind motion. C. The Pepsi Globe Dynamics Emotive forces shape the gestalt of the brand identity.”
March 30, 2024 at 3:01 AM
momfriend64.northsky.social
Reminder to new users:
A page from the notorious Arnell "Breathtaking" Pepsi branding document. This page compares the natural geodynamo and magnetic fields of planet Earth to shapes extrapolated from the Pepsi globe logo
September 21, 2023 at 12:18 AM
brandontbishop.bsky.social
Guess this is why the geodynamo works though!
February 10, 2025 at 10:17 PM
stevenjgibbons.bsky.social
New #OpenAccess paper in advance (untypeset pdf) format in Royal Astronomical Society Techniques and Instruments: "A set of codes for numerical #convection and #geodynamo calculations"
doi.org/10.1093/rast...
All codes described are freely available from
github.com/stevenjgibbo...
New paper in RAS Techniques and Instruments, rzad043, https://doi.org/10.1093/rasti/rzad043 "A set of codes for numerical convection and geodynamo calculations" Steven J Gibbons, Ashley P Willis, Chris Davies, David Gubbins. Published: 01 September 2023 In advanced access (pdf only) format from September 1, 2023. All code, documentation, and auxiliary files freely available from https://github.com/stevenjgibbons/LEOPACK-2022-revision
September 2, 2023 at 6:52 AM
marlo.ooo
same image w slightly better alt text
comparison of earth’s structure and magnetic fields to the pepsi logo, referred to in the image as the “pepsi globe” left: diagram of earth’s geodynamo, core, and magnetic fields. right: pepsi globe and energy fields, showing symmetry. the text explains earth’s natural electric generation and force exertion, as well as the pepsi logo’s alleged “symmetrical energy fields [which are] in balance.”
August 17, 2026 at 4:40 PM
metamora.bsky.social
it gets better

a quarter of the time, literally 1/4th of the time,
the moon is *inside* the magnetopause. Meaning the moon *crosses* the boundary of the Earth's geodynamo twice per month
July 3, 2025 at 9:26 PM
bobkopp.net
Reported USGCRP director Matthew Wielicki published 13 papers between when he started grad school in 2008 and when he stopped publishing in 2021

Fun fact: My Matthew Wielicki number is 2. One of his last papers comes out of the lab of a grad school labmate and co-author of mine
Reevaluating the evidence for a Hadean-Eoarchean dynamo
We show that the existence and evolution of the geodynamo before 3.5 Ga ago remains unknown.
www.science.org
July 10, 2026 at 1:25 AM
brandontbishop.bsky.social
Mars atmosphere stripping is mostly related to the end of the Martian geodynamo-induced magnetic field.

Earth's atmosphere is more controlled by interactions with the mantle (volcanic outgassing balances within measurement error with what's returned to the mantle at subduction zones).
August 5, 2026 at 1:32 PM
brandontbishop.bsky.social
And they never do!

This is why it's important to collide a large number of iron-nickel asteroids with Mars!

...to restore the Martian geodynamo of course.

The re-establishment of a global magma ocean is a *completely* unintended consequence.

Completely.

😐
June 27, 2026 at 2:07 AM