A farmer has died after a sinkhole swallowed their combine harvester in the village of Russkiy Melkhituy in the Irkutsk region of Siberia. The sinkhole, which is 35 feet deep, engulfed the vehicle, causing it to land on its cabin. An onlooker reported that the combine harvester was pressed down by its full weight, emphasizing the severity of the situation.
The cause of the sinkholes remains unknown. Around the same time, another sinkhole, located approximately 400 miles away at a ski resort, also widened. This sinkhole is close to several holiday homes but has fortunately resulted in no casualties.
It originally opened up on top of an iron-ore mine in December 2022. The phenomenon of expanding sinkholes isn’t new to Siberia. The Batagaika crater, also known as a ‘Gateway to the Underworld,’ was first discovered in the 1960s and has been expanding for the last 60 years.
From 1991 to 2018, it tripled in size and is now the largest permafrost crater in the world. What began as an insignificant ravine has turned into a vast, tadpole-shaped depression covering 200 acres, measuring one kilometer in length, and reaching depths of up to 100 feet in some areas. Experts attribute this alarming expansion to the thawing of permafrost.
Farmer lost in sinkhole disaster
As the permafrost warms, the ice that binds the subsoil melts and transforms into water, leading to ground subsidence and the formation of such craters. A recent study has linked climate change to the explosive release of methane gas from Siberian permafrost, attributing the phenomenon to the region’s unique geology and climate warming.
“There are very, very specific conditions that allow for this phenomenon to happen,” said Ana Morgado, a chemical engineer at the University of Cambridge and one of the study’s authors. “We’re talking about a very niche geological space.”
The study explores how these methane releases are driven by warming temperatures and underground pressure changes, rather than just permafrost melting alone. The research team investigated whether physical or chemical processes triggered the explosions.
According to Julyan Cartwright, a geophysicist at the Spanish National Research Council and study co-author, physical factors are likely responsible. He explained, “Either a chemical reaction happens, and you have an explosion, like dynamite blowing up, or you pump up your bicycle tire until it blows up – that’s physics.”
The study concluded that physical forces were the cause, specifically osmosis, where water movement creates pressure changes. Warming alters the thick clayey permafrost of the Yamal Peninsula, allowing water from thawing layers above to force its way into salty, unfrozen underground water pockets known as cryopegs.
This pressure buildup eventually causes methane hydrates to destabilize and explode. The combination of pressure, warming, and unique underground layers all contribute to this explosive process, which can take decades to unfold, linking its origins to climate warming beginning in the 1980s. Though rare, these methane explosions could have a significant impact on global warming due to the release of methane, a potent greenhouse gas.
“This might be a very infrequently occurring phenomenon,” Morgado explained, “but the amount of methane that’s being released could have quite a big impact on global warming.”
These incidents underscore the need for further research and immediate attention to understand the phenomena and mitigate risks associated with permafrost thawing in Siberia.
April Isaacs is a news contributor for DevX.com She is long-term, self-proclaimed nerd. She loves all things tech and computers and still has her first Dreamcast system. It is lovingly named Joni, after Joni Mitchell.
