The Batagay megaslump — a 3,250-foot-wide (990 meters) is "actively growing" by a massive amount every year, as per recent findings.
Characteristics of the Megaslump:
Batagay megaslump, the world’s biggest permafrost crater, is located in the Russian Far East.
It is a retrogressive thaw slump. Retrogressive thaw slumps belong to a class of terrain types called thermokarst that occur in areas underlain by permafrost.
It was first observed on satellite images in 1991 after a section of hillside collapsed in the Yana Uplands of northern Yakutia, Russia.
The collapse exposed layers of permafrost within the remaining hillside, which contains some of the oldest permafrost in Siberia and the world, dating back up to 650,000 years.
From 1991 to 2018, the area increased by almost three times.
Fact Box: About Permafrost
Permafrost refers to any ground that remains completely frozen at or below 32°F (0°C) for at least two consecutive years.
It is most commonly found in regions with high mountains and in Earth's higher latitudes, particularly near the North and South Poles.
Composition of Permafrost: Permafrost consists of a mixture of soil, rocks, and sand that are bound together by ice.
The soil and ice in permafrost remain frozen throughout the year, regardless of seasonal changes in temperature.