This Moderate Resolution Imaging Spectroradiometer (MODIS) from the Terra satellite on May 23, 2003, shows a large plume of smoke passing over Central Canada. The smoke probably originated from the intense forest fires burning in Asia.
The high-resolution image provided above is 500 meters per pixel. The MODIS Rapid Response System provides this image at MODIS’ maximum spatial resolution of 250 meters.
Image courtesy Jeff Schmaltz, MODIS Rapid Response Team at NASA GSFC