wire is straight or circular). Conversion to non-SI units One tesla is equivalent to: 10,000 (or 104) G (gauss), used in the CGS system. Thus, 1 G = 10−4 T = 100 μT (microtesla). 1,000,000,000 (or 109) γ (gamma), used in geophysics. Thus, 1 γ = 1 nT (nanotesla). For the relation to the units of the magnetising field (ampere per metre or Oersted), see the article on permeability. Examples The following examples are listed in the ascending order of the magnetic-field strength. 3.2 × 10−5 T (31.869 μT) – strength of Earth's magnetic field at 0° latitude, 0° longitude 4 × 10−5 T (40 μT) – walking under a high-voltage power line 5 × 10−3 T (5 mT) – the strength of a typical refrigerator magnet 0.3 T – the strength of solar sunspots 1.25 T – magnetic flux density at the surface of a neodymium magnet 1 T to 2.4 T – coil gap of a typical loudspeaker magnet 1.5 T to 3 T – strength of medical magnetic resonance imaging systems in practice, experimentally up to 17 T 4 T – strength of the superconducting magnet built around the CMS detector at CERN 5.16 T – the strength of a specially designed room temperature Halbach array 8 T – the strength of LHC magnets 11.75 T – the strength of INUMAC magnets, largest MRI scanner 13 T – strength of the superconducting ITER magnet system 14.5 T – highest magnetic field strength ever recorded for an accelerator steering magnet at Fermilab 16 T – magnetic field strength required to levitate a frog (by diamagnetic levitation of the water in its body tissues) according to the 2000 Ig Nobel Prize in Physics 17.6 T – strongest field trapped in a superconductor in a lab as of July 2014 27 T – maximal field strengths of superconducting electromagnets at cryogenic temperatures 35.4 T – the current (2009) world record for a superconducting electromagnet in a background magnetic field 45 T – the current (2015) world record for continuous field magnets 97.4 T – strongest magnetic field produced by a "non-destructive" magnet 100 T – approximate magnetic field strength of a typical white dwarf star 1200 T – the field, lasting for about 100 microseconds, formed using the electromagnetic flux-compression technique 109 T – Schwinger limit above which the electromagnetic field itself is expected to become nonlinear 108 – 1011