Sinkhole / Crater | 10 | |
Permafrost Change | 6 | |
Physical or Chemical Change | 1 | |
Debris / Trash | 1 | |
Erosion | 1 | |
Extreme Precipitation | 1 | |
Extreme Temperature | 1 | |
Flooding / Draining | 1 | |
Ice / Snow Change | 1 |
1 | 3 | 3 | 3 |
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1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 |
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SPRING | 3 | |
FALL | 2 | |
SUMMER | 2 | |
WINTER | 1 |
United States | 7 | |
Canada | 1 | |
Iceland | 1 | |
Russia | 1 |