A. C. Fraser-Smith: Research Interests

[Note: Clicking on any one of the highlighted references below will give you a segment of Prof. Fraser-Smith's publication list with the desired reference usually at (or close to) the top of the segment.]

Prof. Fraser-Smith conducts experimental and theoretical research into the origin and properties of low frequency electromagnetic field variations in the Earth's environment and in space. The specific frequencies covered by this work are the following:

Prof. Fraser-Smith also investigates the relation of these ULF, ELF, and VLF electromagnetic variations to other phenomena on and below the Earth's surface (including the sea surface), in the neutral atmosphere, and in the ionosphere, magnetosphere, and interplanetary space.

Figure 1, displayed below and taken from [ Fraser-Smith and Roxburgh,1969 ], shows a spectrogram (i.e., a frequency versus time display) of very simple ULF magnetic signal. During the 1960's these signals were referred to as hydromagnetic (hm) whistlers. Nowadays they would be called Pc 1 whistlers. Notice how each successive element of the signal is progressively more inclined to the time axis. The straight lines drawn in on the figure show how the authors made use of the progressively increasing inclination of the whistler's elements to estimate the starting time of the whistler event.