Early in 1977, after a year or more of abnormal weather throughout the northern hemisphere, it was revealed that Canada, since July 1976, had been receiving almost daily a series of strange and immensely powerful signals which were emanating from the USSR. These abnormal transmissions, it was suggested, were of such gargantuan intensity that they were disrupting the whole weather pattern of North America. What could be the purpose of such extravagant transmissions? They interfered considerably with marine communications to such an extent that both the British and the United States governments sent protests to the Soviet authorities. Using three monitoring stations, the government of Canada attempted to locate the source of the transmissions. Finally they tracked down the source to Riga, the former capital of Latvia, and a formal protest was made. Some time later, the USSR admitted that experiments with high-frequency radio bands had been conducted. Shortly afterwards, the massive ‘blanket’ transmissions ceased, and they were replaced by short bursts lasting only 20 to 30 seconds a day. But that was not the end of the affair. At ten o‘clock in the morning of December 24th Montreal time, the receiving station on Prince Edward Island suddenly received a powerful signal originating several thousand miles to the east. Then, about an hour later, the same signal, but at a higher intensity, was detected, from the opposite direction.