Siberian permafrost hole/blowout

[ArgonneForest]

PBS Nova re-airing the Siberian Blow Hole show again first week of April, wed here.

A very good video by PBS. Most concerning, they found a lake which probably leaks methane through a fault line crack - Easy Lake methane escapes probably through fault lines nearby and Alaska is very active in terms of seismicity. This undermines the notion that permafrost will be a gradual release. At least in the Alaska regions with high seismicity one may look for fault line methane seepage.

PBS: Arctic Sinkholes
https://earthclimate.tv/video/arctic-sinkholes/

It does no such thing to undermine the current thinking on the rate of permafrost emissions.

[morganism]

Siberia’s mysterious exploding craters may be caused by hot gas

Several enormous craters left by explosions have been spotted in Siberia over the past 15 years, and a new explanation links them to hot gas – and climate change

Deep, cylindrical craters in the permafrost of Siberia have puzzled researchers since they were discovered a decade ago. Researchers now propose that the distinctive structures are caused by a build-up of hot gas beneath the permafrost. Warming Arctic temperatures might then weaken the permafrost so much that the gas explodes through its surface.

“Climate change is likely the triggering factor, but it happens there because you have the thinning of the permafrost due to the gas,” says Helge Hellevang at the…

(paywalled)

https://www.newscientist.com/article/2412072-siberias-mysterious-exploding-craters-may-be-caused-by-hot-gas/

[vox_mundi]

A diagram, cropped from the study, explains the process by which the exploding craters could be formed. The natural gas building up over a layer of sediment is represented in purple.

https://www.businessinsider.com/mystery-siberia-exploding-craters-may-have-finally-been-solved-methane-2024-1?amp

[morganism]

Am wondering if the induced seismicity of a couple of those holes blowing may be shaking loose the cap layers on others. Would be pretty bad if a real quake liquefied the over burden.
 The underwater karst fields up by Denmark show large fields of blown holes, and they are under pressure from the water.

[morganism]

map from here   ...  https://www.researchgate.net/figure/Tectonic-map-of-the-Jurassic-structural-stage-of-the-West-Siberian-petroleum-province_fig1_328619604




https://www.researchgate.net/figure/Maps-showing-the-relocated-epicenter-of-the-1908-earthquake-in-the-Barents-and-Kara-sea_fig4_332965372