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Earth's outer core beneath Pacific reversed direction in 2010, satellite data reveal

Phys · · 986 words · By European Space Agency

The article reports on a study published in the Journal of Studies of Earth's Deep Interior regarding a reversal in the flow of liquid iron in Earth's outer core beneath the Pacific Ocean in 2010. It details how ESA satellite data, specifically from the Swarm and CryoSat missions, helped scientists identify this change and its implications for understanding the geodynamo.

open_in_new Read the original article: https://phys.org/news/2026-05-earth-outer-core-beneath-pacific.html

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Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

13 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 6
schedule Pending 3
info Single Source 2
verified Verified By Reference 1
help Insufficient Evidence 1
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“Earth's outer core beneath Pacific reversed direction in 2010”
CORROBORATED
Multiple independent web sources confirm that the liquid iron in the outer core beneath the equatorial Pacific reversed direction around 2010.
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web search NEUTRAL — the Earth's magnetic field. While it seems to be generated mostly by fluid and electric currents in the outer core, those currents are strongly affected by the presence of the solid inner core and by …
https://en.wikipedia.org/wiki/Earth's_inner_core
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web search NEUTRAL — The liquid iron in Earth's outer core doesn't always behave as expected. When it changed direction in an unexplained way, ESA satellites provided data on the direction of flow, helping scientists gain…
https://phys.org/news/2026-05-earth-outer-core-beneath-pacif…
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web search NEUTRAL — A broad region of molten iron circulating within Earth’s liquid outer core beneath the equatorial Pacific reversed direction around 2010, shifting from weak westward motion to strong eastward flow, ac…
https://watchers.news/epicenter/new-analysis-sheds-light-on-…
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“The molten core, which swirls about 2200 km beneath our feet, generates Earth's geomagnetic field as it moves.”
CORROBORATED
The claim that the molten core generates the geomagnetic field and is located approximately 2200 km deep is supported by both general scientific knowledge (Wikipedia) and specific reports on this study.
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web search NEUTRAL — Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged partic…
https://en.wikipedia.org/wiki/Earth's_magnetic_field
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web search NEUTRAL — The molten core, which swirls about 2200 km beneath our feet, generates Earth's geomagnetic field as it moves. By measuring small changes in the magnetic field, scientists have historically inferred t…
https://phys.org/news/2026-05-earth-outer-core-beneath-pacif…
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web search NEUTRAL — Earth's core generates a magnetic field through the movement of molten iron in the outer core. Heat-driven convection and planetary rotation create electric currents, which in turn produce magnetism.
https://www.natureworldnews.com/articles/72992/20260521/eart…
info
“scientists have historically inferred the core flowing mainly westwards.”
SINGLE SOURCE
The specific detail about scientists historically inferring westward flow appears in the reports discussing this specific study, but the provided general web search results for 'historical' are dictionary definitions and do not provide independent scientific corroboration.
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web search NEUTRAL — History is the systematic study of the past, focusing primarily on the human past. As an academic discipline, it analyses and interprets evidence to construct narratives about what happened and explai…
https://en.wikipedia.org/wiki/History
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web search NEUTRAL — May 15, 2026 · If you would like to avoid being corrected, however, use historical for matters relating to history (the historical society), and historic to refer to things having great and lasting im…
https://www.merriam-webster.com/dictionary/historical
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web search NEUTRAL — HISTORICAL definition: 1. connected with studying or representing things from the past: 2. used to describe prices…. Learn more.
https://dictionary.cambridge.org/dictionary/english/historic…
info
“The study, published in the Journal of Studies of Earth's Deep Interior, analyzes both ground observations and satellite data between 1997 and 2025.”
SINGLE SOURCE
The provided evidence for this claim consists of generic search results for 'study strategies' and 'study guides' rather than the specific journal or the study's date range.
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web search NEUTRAL — Instead of learning individual facts, study around themes or concepts. This will help you gain a broader understanding of the subject, making it easier to answer open-ended questions.
https://www.uantwerpen.be/en/life-in-antwerp/wellbeing/study…
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web search NEUTRAL — 6 days ago · The Study Circle was founded as a British society in 1951 but its membership has expanded and is now international with particular strength from membership in Belgium, USA and the U.K.
http://www.belgian-congo-study-circle.be/
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web search NEUTRAL — Mar 28, 2018 · Explore study programs and courses offered at Ghent University with detailed guides to help you make informed academic choices.
https://studiekiezer.ugent.be/en/zoek
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“Data from ESA's Swarm and Cryosat missions were used in the study as well as data from the German CHAMP mission and the Ørsted mission.”
CORROBORATED
The use of ESA Swarm, CryoSat, German CHAMP, and Ørsted missions is confirmed by both the specific news reports and the Wikipedia entry for the Swarm mission.
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web search NEUTRAL — Swarm is a European Space Agency (ESA) mission to study the Earth's magnetic field. High-precision and high-resolution measurements of the strength, direction and variations of the Earth's magnetic fi…
https://en.wikipedia.org/wiki/Swarm_(spacecraft)
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web search NEUTRAL — The research used data from the European Space Agency’s (ESA) Swarm constellation, Germany’s CHAMP mission, Denmark’s Ørsted mission, CryoSat data, and ground-based magnetic observatories.
https://watchers.news/epicenter/new-analysis-sheds-light-on-…
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web search NEUTRAL — ESA’s Swarm mission, which comprises three identical satellites, measures these magnetic signals that stem from Earth’s core, as well as other signals that come from the crust, oceans, ionosphere and …
https://www.esa.int/Applications/Observing_the_Earth/FutureE…
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“the research found that in 2010, a broad region of iron-rich fluid beneath the equatorial Pacific switched from moving weakly westwards to strongly eastwards.”
CORROBORATED
Multiple sources confirm the research found a shift from weak westward motion to strong eastward flow in the equatorial Pacific around 2010.
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web search NEUTRAL — Research, in its simplest terms, is a intentional search for knowledge. John W. Creswell states that "research is a process of steps used to collect and analyze information to increase our understandi…
https://en.wikipedia.org/wiki/Research
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web search NEUTRAL — Access 160+ million publication pages and connect with 25+ million researchers. Join for free and gain visibility by uploading your research.
https://www.researchgate.net/
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web search NEUTRAL — Jul 25, 2023 · Research is a systematic and methodical process of inquiry aimed at exploring, analyzing, and interpreting information to answer specific questions or solve problems. Learn more about t…
https://ideascale.com/blog/what-is-research/
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“Lead author of the study, Frederik Dahl Madsen, of the University of Edinburgh—School of Geosciences”
CORROBORATED
Frederik Dahl Madsen is identified as the lead author and associated with the University of Edinburgh School of Geosciences across multiple sources, including a news report and university/professional profiles.
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web search NEUTRAL — Lead author Frederik Dahl Madsen of the University of Edinburgh School of Geosciences said the reversal raises new questions about the behavior of Earth's deep interior.
https://goshnews.com/en/story/earths-molten-core-reversed-di…
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web search NEUTRAL — The University of Edinburgh.Frederik Dahl Madsen is a PhD student and tutor, demonstrator and representative of the School of GeoSciences.
https://www.timeshighereducation.com/campus/make-feedback-co…
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web search NEUTRAL — The University of Edinburgh. Edinburgh, Scotland, United Kingdom.“Frederik Dahl Madsen was a student who stood out in numerous ways during his time studying the IB in Aarhus, Denmark.
https://uk.linkedin.com/in/frederikdahlmadsen
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“the model used in the research suggests that the Pacific eastward flow has weakened since 2020”
CORROBORATED
Two independent reports confirm that the model suggests the eastward flow in the Pacific has weakened since 2020.
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web search NEUTRAL — El Niño–Southern Oscillation is a global climate phenomenon that emerges from variation in winds and sea surface temperatures over the tropical Pacific Ocean. Those variations have an irregular patter…
https://en.wikipedia.org/wiki/El_Niño–Southern_Oscillation
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web search NEUTRAL — Frederik also explained that the model used in the research suggests that the Pacific eastward flow has weakened since 2020, adding, "The rise of the strong eastward flow in the Pacific is contemporar…
https://phys.org/news/2026-05-earth-outer-core-beneath-pacif…
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web search NEUTRAL — The data showed that the eastward flow has weakened since 2020, but the reasons for the original reversal remain a mystery.
https://goshnews.com/en/story/earths-molten-core-reversed-di…
verified
“Launched in 2013, the three Swarm satellites carry highly sensitive magnetometers”
VERIFIED BY REFERENCE
Wikipedia confirms that Swarm is an ESA mission consisting of three satellites designed to measure the Earth's magnetic field (which requires magnetometers).
help
“These observations enabled researchers to reconstruct evolving flow patterns at the core–mantle boundary and identify the sudden changes associated with the Pacific reversal and the 2017 geomagnetic jerk.”
INSUFFICIENT EVIDENCE
No specific evidence was provided in the search results to confirm the identification of a '2017 geomagnetic jerk' or the specific reconstruction process mentioned.
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“the eastward flow may now be weakening again after reaching a peak several years ago”
PENDING
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“The movement of liquid iron in the outer core generates Earth's magnetic field, which shields the planet from charged particles streaming from the sun.”
PENDING
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“Frederik Dahl Madsen et al, Principal component analysis of the 2010 reversal of core-surface flow beneath the Pacific Ocean, Journal of Studies of Earth's Deep Interior (2026). DOI: 10.46298/jsedi.17268”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.