The worst natural disaster suffered by a North American city in the twentieth century …
In 1906, San Francisco was hit by one of the worst natural disasters in American history. It was the Great San Francisco Earthquake. It was the largest natural disaster to be suffered by a North American city in the twentieth century. Specifically, at 5:12 a.m. on April 18th (as the PBS webpage puts it), “San Francisco residents were awakened by a 40-second tremor that moved furniture, shattered glass, and toppled chimneys. After a 10-second interval, an even stronger tremor struck, lasting 25 seconds.” (Source: PBS’s webpage on this program) As PBS also notes, “Movement along the San Andreas Fault was to blame. The North American and Pacific tectonic plates had moved past each other by more than 15 feet — compared to an annual average of two inches. The earthquake is estimated to have measured 8.3 on the Richter scale, which had not yet been invented. Survivors saw the ground move in waves as high as three feet. The earthquake ripped open streets, twisted streetcar rails, and split sidewalks.” (Source: Same as above)

 


 
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