National Radio Silence Day

From Wikipedia:

On August 21–23, 1924, Mars entered an opposition closer to Earth than at any time in the century before or the next 80 years. In the United States, a "National Radio Silence Day" was promoted during a 36-hour period from August 21–23, with all radios quiet for five minutes on the hour, every hour. At the United States Naval Observatory, a radio receiver was lifted 3 kilometres (1.9 miles) above the ground in a dirigible tuned to a wavelength between 8 and 9 km, using a "radio-camera" developed by Amherst College and Charles Francis Jenkins. The program was led by David Peck Todd with the military assistance of Admiral Edward W. Eberle (Chief of Naval Operations), with William F. Friedman (chief cryptographer of the United States Army), assigned to translate any potential Martian messages.

No Martian messages were received.

More info:

     Posted By: Alex - Thu Dec 14, 2023
     Category: Aliens | Radio | 1920s

It’s fascinating that the highest levels of government went along with this. Then again, at a time when radio broadcasting was in its infancy, it would have been easier to pull off. It would have been like shutting off the Web for a day in the mid 1990s.
Posted by Brian on 12/14/23 at 05:09 AM
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