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the claim
Rock avalanches accumulated on top of the Birch Glacier to trigger its collapse.
the verdict
SUPPORTED
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Recorded sources
5 sources for · 0 against
Is it true that rock avalanches accumulated on top of the Birch Glacier to trigger its collapse?
Yes. Multiple peer-reviewed and reference sources report that rock debris and rockfalls accumulated on the Birch Glacier in May 2025, loading it and leading to its collapse and the subsequent debris-ice avalanche that destroyed Blatten.
Verdict: SUPPORTED · 5 sources for, 0 against · Last checked
Evidence for · 5
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Anatomy of the Blatten rock-collapse debris-ice avalanche (28 May 2025): Insights from a local Quaternary geologist. (2026). doi.org. https://doi.org/10.5194/egusphere-egu26-6599
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More for · 4
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Knuth, F., Hodel, E., Heisig, H., Marty, M., Jacquemart, M., Bauder, A., Simmen, J., & Farinotti, D. (2026). Automated photogrammetric reconstruction of Birch Glacier, Switzerland (1946–2025): A high-density time series of topographic change preceding catastrophic glacier collapse. doi.org. https://doi.org/10.5194/egusphere-egu26-22072
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2025 Blatten glacier collapse - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/2025_Blatten_glacier_collapse
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On the contribution of permafrost and its degradation to the Blatten disaster (Swiss Alps). (2025). hal.science. https://hal.science/hal-05375095v1
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On the contribution of permafrost to the Blatten disaster. (2025). hal.science. https://hal.science/hal-05364418v1
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