Science: Four-Year Quake

A noticeable tremor has shaken the North Atlantic seaboard about every four years since 1925. Last week the quadrennial earthquake arrived close to schedule (last one was in December 1940). The New York Daily News cried: QUAKE EAST'S WORST IN 58 YEARS. In Philadelphia, seismologists reported it as the sharpest shock in the city's records. Tremors were felt from Canada to Virginia and as far west as Wisconsin. But, except in Cornwall. Ont., which reported $1,000,000 damage, no one was hurt.

Harvard Seismologist Lewis Don Leet thinks that Easterners are much too complacent about earthquakes. Last week, renewing his warning...

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