Dipole model of the Earth's magnetic field (MLAT), or geomagnetic latitude, formula_10 is measured northwards from the equator (analogous to geographic latitude) and is related to formula_9 by formula_12. In this case, the radial and azimuthal components of the magnetic field (the latter still in the formula_9 direction, measured from the axis of the north pole) are given by formula_14 formula_15 formula_16 where formula_17 in this case has units of Earth radii (formula_18). Invariant latitude is a parameter that describes where a particular magnetic field line touches the surface of the Earth. It is given by formula_19 or formula_20 where formula_21 is the invariant latitude and formula_22
Latitude Festival Women were advised against going anywhere on site unaccompanied. Latitude 2011 (the sixth edition) took place on 14–17 July 2011. The first line up announcements were revealed on 14 March 2011. The three Obelisk headliners were revealed as well as a number of other artists and acts appearing across all stages. Latitude 2012 (the seventh edition) took place on 12–15 July 2012. The first line up announcements were revealed on 5 March 2012. The three Obelisk headliners were revealed alongside the three Word Arena headliners, as well as a number of other artists and acts appearing across all stages. What