>>8641607
There are unidentified fault lines all over the place. Also magma reservoirs under old volcanoes.
That being said …..
Anons have been on the lookout for EQ events that are actually underground detonations as the good military take back the bunkers and DUMBs and tunnels from blackhats, and rescue victims.
I looked at the waveform and could not form an opinion as to whether it was a natural EQ event or a demolition event.
Lot of info about DUMBs was posted a few breads ago:
>>8637959 PB
>>8637992 PB
>>8638068 PB
>>8638189 PB
Bun recapitulating public domain info on tunnel boring machines and DUMBs. Oldfags created the bun to make newanons aware that there really are tunnels and deep underground bases.
Videos:
Underground War happening now part 1 and Part 2
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https://www.youtube.com/watch?v=F0NEd9gEHFs
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https://www.youtube.com/watch?v=TWBOxH9UcwI&feature=youtu.be
>>8638797 PB
>re: DUMBS, Underground Warfare
>"expects underground fighting to become not merely an add-on issue for the US, and said it might emerge as the primary playing field for combat."
>"Special Assistant to the US Army Judge Advocate-General Michael Meier told the conference that North Korea has around 5,000 out of the 10,000 tunnels and bases underground worldwide.
>He said that North Korea and other countries do not merely build tunnels. Rather, they build sometimes vast underground facilities under mega cities where pursuers can get lost in a byzantine maze of utilities pipelines and subway lines"
>https://www.jpost.com/Opinion/Military-Affairs-The-next-underground-war-611509
>"Last year, the U.S. Army accelerated its push to outfit 26 of its 31 active combat brigades with new tools and training to “fight in large-scale subterranean facilities that exist beneath dense urban areas around the world,” Military.com reported"
>https://www.defenseone.com/technology/2018/06/underground-may-be-us-militarys-next-warfighting-domain/149296/
As to whether fighting is occurring underground … Here's something that we heard, with no way to verify accuracy.