Typical sawtooth pattern in the mountains frequency (IMAGE)

GFZ Helmholtz-Zentrum für Geoforschung

Typical sawtooth pattern in the mountains frequency

Caption

The researchers observe a characteristic sawtooth pattern in the frequency of the mountain (top): it rises with the stress in the rock and drops again after days. In the process, seismic signals are registered (bottom), which occur when rock cracks open. If the cycles become shorter, a mass break-up is approaching. This is also a danger indicator.

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Dietze/GFZ

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