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Ice Quakes (Crevasse Opening (Also en- & sub-glacial fracturing, Ice…
Ice Quakes
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- Ice moves over undulation on bed
- Ice experiences tension
--> outer arc must travel further than inner
- Elastic response accomodates some tension
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Icequakes Location
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e.g. Greenland IS, Mont Blanc Valley
Icequake Sources
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- Stick-slip movement at base of ice sheet
Persistent, unfocussed, not sharp seismic signal
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