The results revealed that the velocity at the time of the final impact reached approximately 298 km/h, equaling the speed of the fastest high-speed trains and constituting a landslide velocity that had previously not been reported.
A measurement of the landslide velocity has not been implemented due to the very low percentage of cases with information related to speed.
Level 1 represents extremely slow landslides with speeds of less than 16 mm/year, whereas Level 7 represents extremely fast landslides with speeds higher than 5 m/s (18 km/h).
These authors established a relationship between different levels of damage, produced by the landslide, with different speed thresholds of the mass movement.
where x = 0 is the position at the foot of the mound where the landslide has a speed U 0, g = 3.7 m/s2 is the intensity of the Martian gravity field, and μ is the (dimensionless) effective friction coefficient, assumed constant in this calculation.
Some landslides even exceed this speed, but to determine the exact velocity of a landslide is difficult without reliable measures.
Moreover, because of the landslide's extremely high speed, the buildings distributed around its deposit boundary collapsed due to the extreme force of an air-blast caused by the landslide motion.
When an eruption releases mixtures that are denser than air, it forms a toxic landslide, careening downhill at speeds between 30 and 90 miles per hour and temperatures up to 1,300 degrees.
Travel over glaciers can change landslide dynamics and amplify the speed and length of runout.
A simple kinematic model neglecting friction explains such bending effect as a consequence of diminished speed of the landslide traveling along local topographic inclination (De Blasio 2011b).
