Avalanche Terrain Hazard Map covering the Alps
The ATHM
The ATHM shows the extent to which the terrain in the vicinity of a point is likely to trigger an avalanche as a result of winter sports. It is based on specific characteristics of the terrain such as the slope shape, slope size, slope gradients, and vegetation in the vicinity of the point in question. The stability of the snowpack is not taken into account.
Legend
- Transparent: no avalanche terrain
Avalanches triggered by winter sports are unlikely. However, accidents caused by spontaneous avalanches are always a possibility - Green: atypical avalanche terrain
Avalanches triggered by winter sports are not typical in these areas - Blue: typical avalanche terrain
Avalanches can be easily triggered - Red: very typical avalanche terrain
Avalanches are very typical/highly likely in these areas
Comparison with the slope angle map
The map layer we provide that covers slope angles already gives a general view of how exposed the area is. However, the likelihood of avalanches is not affected by slope gradients alone. Compare the following two map sections for examples:
Although point 1 is located on flat terrain (the map on the left), it is very exposed to avalanches (the map on the right). This is not primarily about the run-out area of spontaneous avalanches. A winter person standing at point 1 is close enough to the slope above to be able to trigger it.
Although point 2 sits on steep terrain (the map on the left), it is not actually avalanche terrain (the map on the right). Although it is certainly possible to trigger avalanches from the ridge on both flanks, these avalanches do not usually affect winter sports enthusiasts as long as they stay in the center of the ridge.
FAQs
The ATHM is provided by Skitourenguru
Skitourenguru is there to support you in selecting and planning ski tours with low avalanche risk. For this purpose, Skitourenguru assigns a daily avalanche risk to thousands of ski routes in the alpine region.
The ATHM map shows a variety of avalanche risk and avalanche danger maps that have been automatically calculated by software. In individual cases, the maps may be inconsistent or incorrect. Skitourenguru does not guarantee the accuracy of the information. Planning and carrying out your winter sports activities is at your own risk and responsibility.
Liability for accidents or damage that occur in connection with any use of the information on these pages is excluded.