Earth’s magnetic field
E781025
Earth’s magnetic field is the invisible, dynamic magnetic force surrounding our planet that shields it from solar wind and cosmic radiation and guides compass navigation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Earth’s magnetic field canonical | 5 |
| Earth magnetosphere | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9142298 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Earth’s magnetic field Context triple: [Manik Talwani, researchInterest, Earth’s magnetic field]
-
A.
International Geomagnetic Reference Field
The International Geomagnetic Reference Field is a standardized mathematical model describing Earth’s main magnetic field and its secular variation, used globally for navigation, geophysical research, and defining geomagnetic coordinates.
-
B.
Magnetic North Pole
The Magnetic North Pole is the wandering point on Earth's surface where the planet's magnetic field lines converge and point vertically downward, serving as the northern focus of Earth's magnetic field used in navigation.
-
C.
Gauss–Matuyama geomagnetic reversal
The Gauss–Matuyama geomagnetic reversal was a major event in Earth's history when the planet's magnetic field flipped polarity around 2.6 million years ago, marking a key boundary used in geological time scales.
-
D.
Mẫu Địa
Mẫu Địa is an earth mother goddess in the Vietnamese Mother Goddess religion (Đạo Mẫu), associated with the land, fertility, and the earthly realm.
-
E.
Earth
Earth is the third planet from the Sun and the only known world to support life, characterized by vast oceans, diverse ecosystems, and a protective atmosphere.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Earth’s magnetic field Target entity description: Earth’s magnetic field is the invisible, dynamic magnetic force surrounding our planet that shields it from solar wind and cosmic radiation and guides compass navigation.
-
A.
International Geomagnetic Reference Field
The International Geomagnetic Reference Field is a standardized mathematical model describing Earth’s main magnetic field and its secular variation, used globally for navigation, geophysical research, and defining geomagnetic coordinates.
-
B.
Magnetic North Pole
The Magnetic North Pole is the wandering point on Earth's surface where the planet's magnetic field lines converge and point vertically downward, serving as the northern focus of Earth's magnetic field used in navigation.
-
C.
Gauss–Matuyama geomagnetic reversal
The Gauss–Matuyama geomagnetic reversal was a major event in Earth's history when the planet's magnetic field flipped polarity around 2.6 million years ago, marking a key boundary used in geological time scales.
-
D.
Mẫu Địa
Mẫu Địa is an earth mother goddess in the Vietnamese Mother Goddess religion (Đạo Mẫu), associated with the land, fertility, and the earthly realm.
-
E.
Earth
Earth is the third planet from the Sun and the only known world to support life, characterized by vast oceans, diverse ecosystems, and a protective atmosphere.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geomagnetic field
ⓘ
planetary magnetic field ⓘ |
| affects |
power grids during geomagnetic storms
ⓘ
radio wave propagation ⓘ satellite operations ⓘ |
| alsoKnownAs |
geomagnetic field
ⓘ
terrestrial magnetic field ⓘ |
| axisTiltRelativeToRotationAxis | about 11 degrees ⓘ |
| createsRegion | magnetosphere ⓘ |
| deflects | charged particles from the Sun ⓘ |
| enables | compass navigation ⓘ |
| evidencedBy | paleomagnetism in rocks ⓘ |
| extendsTo |
magnetosphere
ⓘ
several Earth radii into space ⓘ |
| generatedBy |
Earth’s outer core
ⓘ
linked to:
Gutenberg discontinuity
Earth’s rotation ⓘ convection of molten iron in the outer core ⓘ geodynamo process ⓘ |
| hasAverageSurfaceStrength |
about 0.25 to 0.65 gauss
ⓘ
about 25 to 65 microteslas ⓘ |
| hasComponent |
dipole component
ⓘ
non-dipole components ⓘ secular variation ⓘ |
| hasCurrentState | north magnetic pole located near the geographic North Pole ⓘ |
| hasOriginAge | at least 3 to 4 billion years ago according to geological evidence ⓘ |
| hasPolarity |
north magnetic pole
ⓘ
south magnetic pole ⓘ |
| hasReversalFrequency | irregular intervals of hundreds of thousands of years on average ⓘ |
| influences |
auroras
ⓘ
space weather near Earth ⓘ |
| interactsWith |
ionosphere
ⓘ
solar wind plasma ⓘ |
| isEssentialFor |
habitability of Earth as we know it
ⓘ
long-term atmospheric retention ⓘ |
| locatedIn | Earth’s surrounding space environment ⓘ |
| mappedBy |
International Geomagnetic Reference Field
ⓘ
World Magnetic Model ⓘ geomagnetic models ⓘ |
| measuredBy | magnetometers ⓘ |
| northMagneticPoleDriftSpeed | tens of kilometers per year in recent decades ⓘ |
| protectsFrom |
cosmic radiation
ⓘ
solar wind ⓘ |
| studiedIn | geomagnetism ⓘ |
| trapsParticlesIn |
Van Allen radiation belts
ⓘ
linked to:
Earth’s radiation belts
|
| undergoes |
geomagnetic excursions
ⓘ
geomagnetic reversals ⓘ secular variation ⓘ |
| variesOver | time ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Earth’s magnetic field Description of subject: Earth’s magnetic field is the invisible, dynamic magnetic force surrounding our planet that shields it from solar wind and cosmic radiation and guides compass navigation.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Earth’s magnetic field