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
flagAustralia
8%
15%
23%
50%
60
flagthe Netherlands
0%
30%
20%
50%
20
flagRepublic of Ireland
16%
16%
16%
47%
36
flagFrance
17%
17%
21%
43%
23
flagPoland
9%
19%
28%
42%
15455
flagGreece
0%
25%
33%
41%
24
flagUkraine
12%
29%
16%
41%
24
flagGermany
10%
26%
26%
35%
739
flagthe United Kingdom
13%
21%
28%
34%
198
flagIndia
12%
22%
28%
34%
185
flagSwitzerland
9%
25%
31%
33%
54
flagNigeria
10%
30%
30%
30%
20
flagthe Philippines
6%
29%
35%
29%
31
flagRussia
12%
37%
20%
29%
24
flagthe United States
10%
26%
33%
27%
401
flagAustria
14%
22%
34%
27%
97
flagPakistan
3%
22%
48%
25%
27
flagCanada
14%
40%
22%
22%
54
flagItaly
22%
27%
27%
22%
18
flagUnknown
5%
35%
40%
20%
20