Vector
The geomagnetic field as a force can be represented in each point
of
the Earth’s surface as a vector (arrow) the orientation of which
defines the direction and sense of the action of the field
and the length of which symbolises the intensity.
Virtual axial dipole
moment (VADM)
Intensity of an imaginary
axial (along the Earth's rotation axis) centric (located in the
centre of the Earth) dipole that would
produce the
estimated archaeo-/palaeointensity
at the
sampling
site. It
is calculated from the archaeo-/palaeointensity
of a sample as estimated by measurements in the laboratory and the
magnetic co-latitude of the sampling site.
Virtual dipole moment (VDM)
Intensity of an imaginary
dipole (located in the centre of the Earth) that would produce the
estimated archaeo-/palaeointensity at the
sampling
site. It
is calculated from the archaeo-/palaeointensity
and the palaeoinclination
of a sample as estimated by measurements in the laboratory and the
geographic co-latitude of the sampling site.
Virtual geomagnetic pole (VGP)
Geographic position of a geomagnetic
north/south pole related to an imaginary dipole (located in the
centre of the Earth) which would produce the observed ChRM in a sample.
The VGP is calculated from the mean ChRM direction (Declination,
Inclination)of a sample and the
geographic coordinates of the sampling site.
Viscous remanent
magnetisation (VRM)
Remanent magnetisation
acquired spontaneously by a sample after
an exposure to a weak magnetic
field.