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
Australia
60
the Netherlands
20
Republic of Ireland
36
France
23
Poland
15455
Greece
24
Ukraine
24
Germany
739
the United Kingdom
198
India
185
Switzerland
54
Nigeria
20
the Philippines
31
Russia
24
the United States
401
Austria
97
Pakistan
27
Canada
54
Italy
18
Unknown
20