On February 26, The Global Forecast System model recorded an intense and wide-ranging carbon monoxide (CO) spike over the US West Coast. A region stretching from British Columbia, through Washington and Oregon, and on over most of California experienced CO readings ranging from about 5,000 parts per billion over the mountains of Southwestern Canada to as high as 40,000 parts per billion over Southern California. Very high peak readings appear to have occurred from Northern California near Eureka and the southern edge of the Cascadia Subduction Zone and along a line south and eastward over much of Central California to an extreme peak zone just north and west of Los Angeles near Palmdale along the San Andreas Fault Line.
(Very large CO spike over Western North America near major geological features on February 26, 2016. Image source: Earth Nullschool.)
For reference, these readings were between 50 and…
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