The following is a paper by H. Aspden published in Intercom, pp. 21-22 (December 12, 1978).
Commentary: 'Intercom', the U.K. Home Office Journal edited by the Directorate of Telecommunications, Home Office, published the above article immediately following one entitled the 'Radioquake Mystery'. Its author Richard Hill had suggested that this author should write an accompanying article explaining the scientific basis for the anomaly observed.
The subject is that reported later in these Web pages by the commentary on 'Earthquake-related EM Disturbances' reference [1987d]. That later paper was published by the Royal Astronomical Society. See also [1987k].