Yamal Craters
Near Russia’s Bovanenkovo gas field in 2014, helicopter pilots spotted a fresh circular crater in the Yamal Peninsula’s frozen tundra, a black hole rimmed with thrown-out ice and soil that some reports measured up to 70 meters across at its widest point; similar gas-emission craters later appeared across Yamal and nearby Gydan, pointing scientists toward violent methane blowouts inside thawing permafrost, yet the trigger seems to require a rare mix of warming ground, trapped salty cryopegs, pressure, and methane hydrates, raising a sharper question than what made the first hole: how many more of these silent Arctic mounds are already building pressure under the surface?
In the summer of 2014, an unusually round hole in the tundra of the Yamal Peninsula became an international mystery. Helicopter crews and local observers had noticed a deep vertical opening in the permafrost, ringed by material thrown outward onto the surrounding ground. Early media accounts called it a mysterious Siberian crater. Internet speculation moved quickly, with suggestions ranging from meteorite impact to underground explosions, military activity, or stranger explanations. Scientific teams moved more slowly, treating the opening as a new and dangerous cryospheric landform rather than a supernatural event.
The best documented first crater, later known in much of the scientific literature as GEC-1 or C1, lay in central Yamal near the Bovanenkovo gas field region. Scientific Reports gives the position of the 2014 Yamal crater as N69.970965 E68.369575, about 30 km southeast of the Bovanenkovo gas field. The crater was described as roughly 20 m across at the opening, with vertical lower walls, a conical upper section, a parapet-like ridge of ejected material, and a measured depth exceeding 50 m during the first field work in July 2014. Within a few years, meltwater and wall collapse were already transforming the open shaft into a small lake, showing how quickly the evidence of these events can degrade in ice-rich terrain.
The mystery deepened because the Yamal crater was not isolated. Similar gas emission craters were documented on the Yamal and Gydan peninsulas, and later work compared their morphology, precursor mounds, ejecta, lake formation, gas signatures, and satellite histories. Researchers found that several craters had been preceded by low mounds or perennial heaving mounds, suggesting that pressure was building before the surface failed. Around some sites, frozen soil and ground ice had been thrown tens or hundreds of meters. At the Seyakha crater, formed in 2017, studies reported a powerful gas blowout, self-ignition, an explosion, and continuing gas emission from the crater bottom during later monitoring. At the C17 crater discovered in 2020, researchers used satellite imagery, helicopter photographs, UAV survey, and 3D modeling to study a better-preserved crater and subsurface cavity before flooding destroyed much of the original form.
The dominant scientific explanation is now natural gas emission through permafrost, but the details remain contested. One family of models emphasizes gas-rich permafrost, pressure buildup inside cavities, and a gas-dynamic rupture through ice-rich ground. Another argues that the original Yamal crater can be understood as collapse and explosion of a pingo-like system formed as a talik froze back beneath a former lake, with carbon dioxide-rich gas and cryogenic pressure playing an important role. A later 2024 Geophysical Research Letters study, summarized by the American Geophysical Union, proposed that warming, osmosis into salty cryopeg layers, and methane hydrate destabilization can create pressure changes that produce methane explosions. These models are not all identical, and they may not apply equally to every crater.
What makes the Yamal craters important is not only their eerie appearance. They are short-lived natural hazards in a region of continuous permafrost, reindeer migration routes, industrial infrastructure, gas pipelines, rail lines, and major hydrocarbon fields. They also sit inside a larger scientific concern: Arctic warming, permafrost degradation, greenhouse gas release, and abrupt landscape change. The case is therefore resolved in one sense, the craters are real geological features produced by explosive gas emission, not meteorites or paranormal phenomena. It remains ongoing in another sense because researchers are still determining how often they occur, how to forecast them, how much methane they release, and whether similar craters are being hidden as ordinary-looking lakes after their walls collapse and fill with water.