Orders of magnitude (magnetic field)

Template:Short description This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude.

The magnetic flux density does not measure how strong a magnetic field is, but only how strong the magnetic flux is in a given point or at a given distance (usually right above the magnet's surface). For the intrinsic order of magnitude of magnetic fields, see: Orders of magnitude (magnetic moment).

Note:

• Traditionally, the magnetizing field, H, is measured in amperes per meter.
• Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m²].
• One tesla is equal to 10⁴ gauss.
• Magnetic field drops off as the inverse cube of the distance (Template:Sfrac) from a dipole source.
• Energy required to produce laboratory magnetic fields increases with the square of magnetic field.

Examples

These examples attempt to make the measuring point clear, usually the surface of the item mentioned.

Magnetic field strength (from lower to higher orders of magnitude)

Factor (tesla)	SI name	SI Value	CGS Value	Example of magnetic field strength
10−18 T	attotesla
				Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days)
10−17 T
10−16 T
10−15 T	femtotesla
10−14 T
10−13 T				Human brain
10−12 T	picotesla
10−11 T				"Potholes" in the magnetic field found in the heliosheath around the Solar System reported by Voyager 1 (NASA, 2006)
10−10 T				Heliosphere
10−9 T	nanotesla
10−8 T
10−7 T				Coffeemaker ( away)
		to	to	Residential electric distribution lines (34.5 kV) ( away)
10−6 T	microtesla			Blender ( away)
		to	to	High power (500 kV) transmission lines ( away)
				Microwave oven ( away)
10−5 T
				Magnetic tape near tape head
				Earth's magnetic field at 0° latitude (on the equator)
				Earth's magnetic field at 50° latitude
10−4 T				Magnetic flux density that will induce an electromotive force of 10−8 volts in each centimeter of a wire moving perpendicularly at 1 Template:Sfrac by definition (1 gauss = 1 Template:Sfrac)
				Suggested exposure limit for cardiac pacemakers by American Conference of Governmental Industrial Hygienists (ACGIH)
10−3 T	millitesla			Refrigerator magnets ( to )
10−2 T	centitesla
				Penny-sized ferrite magnet
10−1 T	decitesla			Penny-sized neodymium magnet
				Sunspot
100 T	tesla			Inside the core of a 60 Hz power transformer ( to since 2001Template:Dated maintenance category (articles)) or voice coil gap of a loudspeaker magnet ( to since 2006Template:Dated maintenance category (articles))
		to	to	Medical magnetic resonance imaging systems (in practice)
				Experimental magnetic resonance imaging systems: NMR spectrometer at 400 MHz () to 500 MHz ()
101 T	decatesla
				Levitate a frog by distorting its atomic orbitals
				1 GHz NMR spectrometer
				Strongest continuous magnet field produced by all-superconducting magnet
				Strongest continuous magnetic field produced by non-superconductive resistive magnet
				Strongest non-tiny continuous magnetic field produced in a laboratory (Steady High Magnetic Field Facility (SHMFF) in Hefei, China, 2022), beating previous 45 T record (National High Magnetic Field Laboratory's FSU, USA, 1999) (both are hybrid magnets, combining a superconducting magnet with a resistive magnet)
				Strongest continuous magnetic field produced in a laboratory (National High Magnetic Field Laboratory's FSU, USA, 2019), though the magnet is tiny (only 390 grams)
102 T	hectotesla			Strongest pulsed non-destructive ("multi-shot") magnetic field produced in a laboratory (Pulsed Field Facility at National High Magnetic Field Laboratory's Los Alamos National Laboratory, Los Alamos, NM, USA)
103 T	kilotesla
				Record for indoor pulsed magnetic field, (University of Tokyo, 2018)
				Record for human produced, pulsed magnetic field, (VNIIEF, 2001)
104 T
				Felt by valence electrons in a xenon atom due to the spin–orbit effect
105 T				Non-magnetar neutron stars
106 T	megatesla
107 T
108 T
109 T	gigatesla			Schwinger limit (~4.41 GT) above which the electromagnetic field becomes nonlinear
				Swift J0243.6+6124 most magnetic pulsar
1010 T				Magnetar neutron stars
1011 T
1012 T	teratesla	1 TT	10 PG
1013 T		10 TT	100 PG
1014 T				Magnetic fields inside heavy ion collisions at RHIC

See also

• Orders of magnitude (magnetic moment)