The University of New Brunswick, Canada, maintains an illustrated archive of information on terrestrial impact craters. It lists 169, with exact co-ordinates for each and much other information besides. Many have satellite, aerial and/or ground images, plus full lists of references for each. The URL is http://www.unb.ca/passc/ImpactDatabase/
Earth-logs 
I was just looking at the east shore of Hudson Bay on Google Earth. I noticed how the 500km semi-circle in the southern half of the bay has many features of an ancient impact crater but isn’t listed anywhere. So it must not be one, but what other process would create this type of feature?
Just curious.
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