What is the maximum depth of permafrost?
1,5 m
15 m
150 m
1500 m
In areas of harsh winters the depth of the permafrost can be as much as 1,493 m (4,898 ft) in the northern Lena and Yana River basins. The overlying active layer that seasonally thaws is just 0.6–4 m (2.0–13 ft) thick.
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Answers by country
1,5 m
15 m
150 m
1500 m
answers

60

20

36

23

15492

24

24

753

185

203

55

20

31

24

100

406

27

18

55

20