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Magnetic field intensity as a measure of diffusion strength at low latitudes

Following the quasi-linear pitch angle diffusion theory, an expression for limiting magnetic field in tensity of low latitude incoherent whistler mode waves has been derived. The limiting magnetic field in tensity is then compared with the magnetic field intensities observed experimentally both at the low lati tude ground stations and aboard satellite to estimate the diffusion strength at low latitudes. The diffusion isfound to be generallyvery weak at low latitudes, which implies that the lowlatitude whistler mode mag netic field intensity hardly exceeds 10- 8 Y Z Hz - I.