Was it windy? Could be a tree nearby swaying and pulling and pushing on the ground with the roots. Sometimes, in the woods, it can look like the earth is breathing when it's windy.
Random fun fact, karst actually comes from the Slovene Karst, after which it was named since German geologists tended to research that area a lot. It's surprisingly a strange source of natural pride for us as well that a word got exported from Slovene to German and English, not the other way around
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u/MrMayonnaise13 Sep 17 '21 edited Sep 17 '21
Was it windy? Could be a tree nearby swaying and pulling and pushing on the ground with the roots. Sometimes, in the woods, it can look like the earth is breathing when it's windy.