Magnetic ( compass ) north and geographic ( true ) north are only exactly the same for a small number of places – for example, as of 2000 in the United States only those places on a line running from Wisconsin to the Gulf of Mexico .< ref > But the public may not be as informed, and think there is something mysterious about a compass " changing " across an area as large as the Triangle, which it naturally will.

# Magnetic poles ( or states of polarization at individual points ) attract or repel one another in a similar way and always come in pairs: every north pole is yoked to a south pole.

The Earth's North Magnetic Pole ( currently in the Arctic Ocean, north of Canada ) is physically a south pole, as it attracts the north pole of a compass.

** North Magnetic Pole, the shifting point on the Earth to which the " north " end of a dipole magnet points

The north pole of a magnet is the pole that, when the magnet is freely suspended, points towards the Earth's North Magnetic Pole which is located in northern Canada.

Since opposite poles ( north and south ) attract, the Earth's " North Magnetic Pole " is thus actually the south pole of the Earth's magnetic field.

Magnetic north is of interest because it is the direction indicated as north on a properly functioning ( but uncorrected ) magnetic compass.

Determining a property or site location based upon Magnetic North will result in inaccuracies because true magnetic north fluctuates.

** The North Magnetic Pole of planet Earth, a point where the north end of a compass points downward

Magnetic declination is the angle between magnetic north ( the direction the north end of a compass needle points ) and true north.

Magnetic variation is the angle from magnetic north to true north ( positive in clockwise, easterly direction ) and is caused by the different locations of the Geographic North Pole and the Magnetic North Pole plus any local anomalies such as iron deposits.

Magnetic declination has a very important influence on air navigation, since the most simple aircraft navigation instruments are designed to determine headings by locating magnetic north through the use of a compass or similar magnetic device.

Magnetic media, on the other hand, always carries a magnetic flux-either a " north " pole or a " south " pole.

The world's largest compass rose, drawn on the desert floor at Edwards Air Force Base in California, shows the use of degrees measured clockwise from north, North Magnetic Pole | magnetic north in this case.

* Magnetic bearing: An absolute bearing ( qv ) using magnetic north.

Remember too, that bearings and direction are given / recorded with respect to True North and to Magnetic North.

Magnetic south is the direction towards the south magnetic pole, some distance away from the south geographic pole.

Magnetic circular dichroism ( MCD ) is the differential absorption of left and right circularly polarized ( LCP and RCP ) light, induced in a sample by a strong magnetic field oriented parallel to the direction of light propagation.

The term variometer also refers to a type of variable transformer or an instrument for measuring the magnitude and direction of a Magnetic field.

* Magnetic moment () is a dipole moment measuring the strength and direction of a magnetic source.

* TM modes ( Transverse Magnetic ) no magnetic field in the direction of propagation.

The magnetic field between poles ( see figure for Magnetic pole definition ) is in the opposite direction to the magnetic moment ( which points from the negative charge to the positive charge ), while inside a current loop it is in the same direction ( see the figure to the right ).

The direction the thumb points tell us the direction current is flowing, the Magnetic field will be running 90 degrees from the current path.

It is contrasted with true north ( the direction of the North Pole ) and magnetic north ( the direction of the Magnetic North Pole ).

Magnetic grains may precipitate from a circulating solution, or be formed during chemical reactions, and may record the direction of the magnetic field at the time of mineral formation.

Magnetic fields will act in a direction perpendicular to the electron propagation, thereby conserving velocity, whereas electrostatic fields will cause electrons to move along the field gradient, which may change electron energies if the component of the direction of propagation and field gradients are not perpendicular.

Although it is known that the Signal Department of the Pacific Electric Railway developed the first " Magnetic Flagman " wigwag signal, under the direction of a Mr. Albert Hunt ( some sources list him as J. B. Hunt ), it is not known at what point the Magnetic Signal Company became a separate entity.

Magnetic anisotropy, that is the existence of a easy direction along which the moments align spontaneously in the crystal, corresponds however to " massive " magnons.

The abstract with the first tractogram appeared at the August 1992 meeting of the Society for Magnetic Resonance in Medicine, Widespread research in the field followed a presentation on March 28, 1993 when Michael Moseley re-presented the tractographic images from the Filler group — describing the new range of neuropathology it had made detectable — and drew attention to this new direction in MRI at a plenary session of Society for Magnetic Resonance Imaging in front of an audience of 700 MRI scientists.

In May 1845 the Magnetic Telegraph Company was formed in order to radiate telegraph lines from New York City towards Philadelphia, Boston, Buffalo, New York and the Mississippi.

* 1831 – James Clark Ross discovers the North Magnetic Pole.

It should not be confused with the North Magnetic Pole.

In May 1945 an RAF Lancaster of the Aries expedition became the first Commonwealth aircraft to overfly the North Geographic and North Magnetic Poles.

In 2012, the Magnetic Fields celebrated its new album by launching a North American and European tour.

The Magnetic North Pole wanders, but slowly enough that a simple compass remains useful for navigation.

It is straight down at the North Magnetic Pole and rotates upwards as the latitude decreases until it is horizontal () at the magnetic equator.

The movement of Earth's North Magnetic Pole across the Canadian arctic, 1831 – 2001.

The inclination of the Earth's field is 90 ° at the North Magnetic Pole and-90 ° at the South Magnetic Pole.

They can migrate rapidly: movements of up to km per year have been observed for the North Magnetic Pole.

Over the last 180 years, the North Magnetic Pole has been migrating northwestward, from Cape Adelaide in the Boothia peninsula in 1831 to 600 km from Resolute Bay in 2001.

They were also to attempt to establish the location of the Earth's North Magnetic Pole, then believed to lie somewhere along the western shore of Baffin Bay.

* Barrow's Boys-Fergus Fleming ( 1998 ) " For 30 years beginning 1816, the British Admiralty's John Barrow and his elite team charted large areas of the Arctic, discovered the North Magnetic Pole, were the first to see volcanoes in the Antarctic, crossed the Sahara to find Timbuktu and the mouth of the Niger-John Ross, John Franklin, William Edward Parry and others.

Magnetic North is the fourth full-length album released by the hardcore band Hopesfall.

In 2012, music review website You Aren't Cool called Magnetic North ' both the best and most underrated album Hopesfall released and one of the best slabs of 00's post-hardcore ever made.

The track " Saskatchewan " was originally intended for inclusion on Magnetic North, following the album's title track, but was cut from all releases without the band consenting.

If the ancient magnetic field were oriented similar to today's field ( North Magnetic Pole near the North Rotational Pole ), the strata would retain a normal polarity.