No. 39: May-Jun 1985
Tsunamis are giant sea waves set into motion by earthquakes on the sea floor. Some 322 tsunamis have been recorded in the Pacific between A.D. 83 and 1967 -- or about one every six years on the average. The surprising thing is that tsunamis are more common in November, August, and March, but rarer in July and April. Offhand, no good explanation comes to mind why sea floor quakes should favor some months over others.
(Anonymous; "The Times for Tsunamis," Science News, 127:88, 1985.)