A low-angle fault, usually formed where the ice is under compression. Thrusts commonly extend from the bed and are associated with debris and overturned folds.
Perennial hummocks formed in either the active layer in permafrost areas, or in the seasonally frozen ground in non-permafrost areas, during freezing of the ground.
Perennial hummocks formed in either the active layer in permafrost areas, or in the seasonally frozen ground in non-permafrost areas, during freezing of the ground
Perennial hummocks formed in either the Active Layer in Permafrost areas, or in the seasonally frozen ground in non-permafrost areas, during freezing of the ground. The hummocks may be as much as 50 c
m in height and 160 cm in diameter and can reform within 20 years following destruction. Growth is favoured by silty sediments and reasonably good drainage.
University of Texas at Austin earthquake engineering mobile shaker equipment, built on an International model 4300 truck. Has a moderate force output, which makes it ideal for testing in urban areas.
The maximum force output is about 27 kN. The direction of shaking with this machine can be changed between vertical and horizontal in about four hours at the test site. The direction of shaking in horizontal mode can be transverse or inline with the vehicle.
Thundersnow is a compound of the words 'thunder' and 'snow' used informally to describe an observation of snow at the surface that occurs with lightning and thunder. In the mid-latitudes, thundersnow
is prevalent downwind of lakes (e.g., the U.S. Great Lakes) due to sensible and latent heating of the boundary layer, and also in mountainous regions when the environment is sufficiently unstable and/or when significant orographic lifting occurs in preferred areas. Additionally, embedded convective cells producing thundersnow can occur with intensifying extratropical cyclones. Thundersnow can be associated with increased snowfall rates leading to significant visibility reductions and localized areas of higher snow accumulation.