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Usually, these waves dissipate quickly. However, the seiche generated in the Dickson Fjord that day persisted for several days despite quickly reaching levels that couldn’t even be detected by a small naval boat passing through the area. So why did this one keep rocking, and why did that cause a nine-day earthquake?
The scientists involved in the research believe it was likely partially due to the shape of the fjord, the bottom of which is rounded and likely acted as a “rocking chair” for the water to move around with very little resistance. This meant a lot of energy was trapped in the water, thus causing it to rock back and forth for so long instead of dissipating as rapidly as usual.
As for the landslide that began it all, researchers believe it was a direct result of climate change. As the glacier near Dickson Fjord has thinned and melted, the mountainside has become less stable. Part of it eventually gave way, dropping 25 million cubic meters of rock into the fjord, setting off a chain reaction that led to the nine-day earthquake.
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Publish date : 2024-09-13 09:17:00
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