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Saturday, 14 February 2015


A combination of thick smoke, fog and heavy cloud cover caused complete darkness to fall on Eastern Canada and the New England area of the United States at 10:30 AM on May 19, 1780.

When heavy fog seeped into Western Pennsylvania in 1948, mixed with industrial pollutants, the air became poisonous and killed 20 people in the area.

Nelson's Column during the Great Smog of 1952. By N T Stobbs, Wikipedia
The "Great Smog" began in London on December 5, 1952 and lasted for five days, causing 12,000 deaths and leading to the Clean Air Act 1956.

The term 'pea souper coined' by Londoners for smog, refers to the greenish yellow hue of fog that contains both soot and poisonous sulphur dioxide.

During a football match between Chelsea and Charlton Athletic, the fog was so thick that Charlton keeper Sam Bartram was unaware that the game has been stopped by the referee due to poor visibility, assuming play was in Chelsea's half. It was 15 minutes before the police told him the game has been abandoned.

For aviation purposes 3,280 feet is the visibility distance below which mist is defined as fog.

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