Scientific method
Geomagnetic field modelling
Representation of the observed geomagnetic field as a mathematical model — typically a spherical-harmonic expansion valid for a defined epoch — separating contributions from the core, the crust and external currents.
Classification
- method class
- computational
- access
- indirect
How this record is known
- 1
- Settled consensus
- Cited as the accepted position of the discipline.
1 of 1 claims on this page cite at least one registered source. Counts describe how each statement is known, not how likely it is to be true.
What Lithoen records
Each claim states how it is known and cites its evidence.
EstablishedThe measured field is decomposed into core, crustal and external contributions within a stated validity window.
The observed geomagnetic field is the sum of a core-generated main field, a crustal field, and disturbance fields from currents in the upper atmosphere and magnetosphere; field models separate these contributions using spherical-harmonic expansions valid for a defined epoch.
Evidence support: Supported by the cited evidence · one source
Evidence: NOAA National Centers for Environmental Information n.d. · Primary authority
In the knowledge graph
- Geomagnetic field modelling provides evidence for Outer core
Record last updated 2026-09-06. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.