The World Magnetic Model (WMM) is the standard model for navigation, attitude, and heading referencing systems that use the geomagnetic field. The WMM is also used for civilian applications, including navigation and heading systems. A new version of the model is updated every five years to address changes in Earth’s magnetic field.

2024年12月17日 · The latest version of the World Magnetic Model (WMM), one of the key tools developed to model the change in Earth's magnetic field, has been released. The WMM is a spherical harmonic model of the Earth’s main magnetic field and its slow temporal change.

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 particles emanating from the Sun.

The World Magnetic Model High Resolution (WMMHR) is an advanced geomagnetic field model that provides a more detailed, accurate depiction of the geomagnetic field than the World Magnetic Model (WMM). WMMHR2025 includes core field and secular variation coefficients for degrees n = 1 to 15.

The World Magnetic Model (WMM) is a large spatial-scale representation of the Earth's magnetic field. It was developed jointly by the US National Geophysical Data Center and the British Geological Survey .

The World Magnetic Model (WMM) is a standard model of the core and large-scale crustal magnetic field. It is used extensively for navigation and in attitude and heading referencing systems by the UK Ministry of Defence, the US Department of Defense, the North Atlantic Treaty Organization and the International Hydrographic Organization.

Use the tool below to compute values for the geomagnetic field and secular variation for a given set of coordinates and date. This calculator uses the World Magnetic Model as released in Dec 2024.

The World Magnetic Model (WMM) is a spherical harmonic model of the Earth’s main magnetic field and its slow temporal change. It is jointly developed by the National Centers for

We develop data-based models and calculators of the various magnetic fields originating within the Earth (in the core, mantle, lithosphere and oceans) and in the near-Earth space environment (in the ionized layers of the atmosphere and the magnetosphere). Such models have a wide range of scientific and technical uses, from investigating ...

2025年1月27日 · The importance of the world’s magnetic field is difficult to understate. On the one hand, this magnetic shield is responsible for life forming on Earth in the first place, as it protects the ...