roughly 208 miles. St. Petersburg is at around 60 degrees latitude and the arctic cirle is at 66.5 degrees. At the equador a degree of latitude is 69.11 miles. At other latitudes the number of miles in 1° = (69.11) x (cosine of the latitude). The average latitude was taken as 63. Number of miles per degree at 63 degrees = 0.45 x 69.11 = ~32. Therefore, 32 x 6.5 = 208 miles.
It is not more than that of the Atlantic Ocean, as far as I know though I don't know the correct distance....
No, St Petersburg coordinates are 59°57′N 30°19′E. The Arctic Circle starts at 66° 33′ 39, so St Petersburg is well outside of it.
about 450 miles
about 500 miles
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about 1830 miles