Permafrost is ground that stays frozen year round; the permafrost in interior Alaska also has massive wedges of actual ice locked within the frozen ground. When that ice melts, the ground surface collapses and forms a sinkhole that can fill with water. Thus, a thermokarst lake is born. At first glance, Big Trail looks like any lake. But look closer and there's something disturbing the surface: bubbles.
Auto shops are seeing more business because of damaged tires, and drivers are often inching through a messy maze of bad road conditions. Road crews are making headway but still catching up from unfavorable weather last month.
In Chefornak, a family was forced to evacuate their home because a sinkhole caused by thawing permafrost formed underneath it. That family had to move into a building intended to be a quarantine facility.
A 200 metres wide thermocirque is discovered only weeks after scientists find funnel in the Yamal peninsula, caused by build up of methane.
Heavy rainfalls over the past few months have done more than unleash devastating floods. A landslide caused by heavy rain left three caravan holiday homes teetering on the brink of a cliff at Trimingham, near Cromer on the Norfolk coast, on Monday (News, January 8).And over the past six months th
The issue of erosion is not new to Noatak cemetery. The old cemetery was located near the Noatak's airstrip, but in 1993, the spring breakup caused 30 feet of erosion adjacent to the cemetery. Flooding during the fall of 1994 further threatened the site, so residents relocated 200 graves to the north side of town.