A gas emissions crater or GEC is a crater that is left by an explosion that is believed to be caused by an overheated buildup of gas stuck below a layer of permafrost. The gas is primarily methane (also known as "natural gas") and is generally believed by experts to have seeped up from large underground reserves toward the Earth's surface "through some kind of geological fault," getting trapped when they reach the bottom of the permafrost.
A gas emissions crater or GEC is a crater that is left by an explosion that is believed to be caused by an overheated buildup of gas stuck below a layer of permafrost. The gas is primarily methane (also known as "natural gas") and is generally believed by experts to have seeped up from large underground reserves toward the Earth's surface "through some kind of geological fault," getting trapped when they reach the bottom of the permafrost.
Source: Wikipedia "Gas emission crater" · CC BY-SA 4.0
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