You were sure to notice the drop in heat during Monday's eclipse. A new solar radiation sensor installed by Environment and Climate Change Canada at the AAFC Agassiz Research and Development Centre picks up the drop in heat. The graph below shows the solar radiation by the minute for August 21, 2017 in Agassiz, B.C.
The eclipse shows up nicely and the minimum solar radiation during the eclipse was 66.4 w/m2 which occurred at the eclipse maximum at 10:22 which was a 0.89 magnitude eclipse.
If you eyeball the graph and figure the solar radiation should have been about 550 w/m2 but it was 66.4 instead because of the eclipse that is about an 88% drop in solar radiation; close enough to the 0.89 magnitude of the eclipse.
We had some smoke move by between 1:00 and 1:30