Magnetic declination varies both from place to place and with the passage of time.

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 declination calculator at Natural Resources Canada

# REDIRECT Magnetic declination

Magnetic deviation is the error induced in a compass by local magnetic fields, which must be allowed for, along with magnetic declination, if accurate bearings are to be calculated.

Magnetic declination at Tharwa is 11. 817 deg east, total field strength is 43108 nT

East Antarctica is the larger part of the continent, both the South Magnetic Pole and geographic South Pole are situated here.

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 resonance imaging ( MRI ) MRI is a method of imaging objects that uses a strong magnetic field to detect the relaxation of protons that have been perturbed by a radio-frequency pulse.

# 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.

; Magnetic resonance angiography ( MRA ): This is similar to magnetic resonance imaging.

A live frog is Magnetic levitation | magnetically levitated, an experiment that earned Andre Geim from the University of Nijmegen and Sir Michael Berry ( physicist ) | Michael Berry from University of Bristol the 2000 Ig Nobel Prize in physics.

Magnetic resonance imaging ( MRI ), nuclear magnetic resonance imaging ( NMRI ), or magnetic resonance tomography ( MRT ) is a medical imaging technique used in radiology to visualize internal structures of the body in detail.

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.

B ( r ) is the Magnetic field strength of the planet in SI units ( B in T, μ < sub > 0 </ sub > in H / m )

Magnetic reconnection in the near-Earth magnetotail, producing a disconnected " plasmoid " One possible scenario ( the subject is still debated ) is as follows.

Magnetic tape is a medium for magnetic recording, made of a thin magnetizable coating on a long, narrow strip of plastic film.

* Magnetic levitation, a method by which an object is suspended using magnetic fields

Radboud University runs the High Field Magnetic Laboratory which is able to achieve some of the highest fields available in Europe at 33 teslas ( continuous ) and 60 teslas ( pulsed ).

The permanent moment generally is due to the spin of unpaired electrons in atomic or molecular electron orbitals ( see Magnetic moment ).

In the 1990s, researchers began to use Electroencephalography ( EEG ), Positron Emission Tomography ( PET ) and more recently functional Magnetic Resonance Imaging ( fMRI ), which is now the most widely used imaging technique to help localize personality traits in the brain.

This is a collection of fifteen selected non-fiction entries that had been published in Analog magazine over the years ; it includes five articles authored or co-authored by Zubrin, including " The Hypersonic Skyhook ", " Mars Direct: A Proposal for the Rapid Exploration and Colonization of the Red Planet " ( co-authored with David A. Baker ), " Colonizing the Outer Solar System ", " Terraforming Mars " ( co-authored with Christopher McKay ), and " The Magnetic Sail ".

Magnetic tape data storage is typically used for offline, archival data storage.

Magnetic tape is commonly housed in a casing known as a cassette or cartridge — for example, the 4-track cartridge and the compact cassette.

The treatment is often guided by Magnetic Resonance Imaging ( MRI ); the combination is then referred to as Magnetic resonance-guided focused ultrasound ( MRgFUS ).

* 1995: Madam Butterfly is the central piece of Magnetic Rose, an animated short produced by Katsuhiro Otomo and directed by Kōji Morimoto.

Magnetic mirrors play an important role in other types of magnetic fusion energy devices such as tokamaks, where the toroidal magnetic field is stronger on the inboard side than on the outboard side.

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 deviation is the angle from a given magnetic bearing to the related bearing mark of the compass.

* Magnetic dip, the angle made with the horizontal at any point by the Earth's magnetic field

Magnetic tapes, both analog and digital, wear from friction between the tape and the heads, guides, and other parts of the tape transport as the tape slides over them.

Magnetic Scrolls was a British video game developer active between 1984 and 1990.

Mangum had headlined and curated the ATP event at Butlins Holiday Park, Minehead between March 9 and March 11 of 2012, other bands from the Elephant 6 collective have already been announced to support including Apples In Stereo, The Olivia Tremor Control and The Music Tapes as well as other artists chosen by Jeff including Joanna Newsom and The Magnetic Fields.

Declination converts between true and magnetic bearings: True Bearing equals Magnetic Bearing plus Magnetic Declination.

However, the Doctor learns that the old shaft leads to a convergence point between the North and South Magnetic Poles and deduces that, if the bomb were deflected down this path, the explosion's magnetic energy would be powerful enough to suck the metal Daleks into the core of the Earth.

* The Magnetic North Theatre Festival, based in Ottawa, Ontario and held annually, alternating between Ottawa and another Canadian city.

* Magnetic coupling devices transmit torque through magnetically transparent barriers ( that is the barrier is non-magnetic or is magnetic but is not affected by an applied magnetic field ), for instance between sealed containers or pressurised vessels.

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 ).

* Magnetic yoke is a hand-held devices that induces a magnetic field between two poles.

Magnetic sound is no longer used in commercial cinema, but between 1952 and the early 1990s it provided the highest fidelity sound from film because of its wider frequency range and superior signal to noise ratio compared to optical sound.

Magnetic reconnection occurs on timescales intermediate between slow resistive diffusion of the magnetic field and fast Alfvénic timescales.

Magnetic permeance is defined as the reciprocal of magnetic reluctance ( in analogy with the reciprocity between electric conductance and resistance ):

Magnetic field induction along the axis crossing the center of coils ; z = 0 is the point in the middle of distance between coils.

Magnetic interactions between the magnetosome crystals in a chain cause their magnetic dipole moments to orientate parallel to each other along the length of the chain.

The Lotus series consists of three racing computer games based around the Lotus brand, released between 1990 and 1992 on various formats .. Lotus Esprit Turbo Challenge, Lotus Turbo Challenge 2, and Lotus III: The Ultimate Challenge were developed by Magnetic Fields and published by Gremlin Graphics, gaining favourable reviews upon release.

Magnetic resonance imaging ( MRI ) can be used to discern incomplete ruptures from degeneration of the Achilles tendon, and MRI can also distinguish between paratenonitis, tendinosis, and bursitis.

Magnetic reactance is the component of complex magnetic impedance of the alternating current circuit, which produces the phase shift between a magnetic current and magnetic tension in the circuit.