The loudest part of an iceberg’s birth may come after it has already broken free.
A newly calved block can be tall, narrow and unstable. As it rolls onto its side, the enormous mass of ice pushes against the glacier front and the seafloor through the water. That slow shove can send surface waves through Earth that instruments register hundreds of kilometres away.
These are glacial earthquakes. They are not conventional earthquakes caused by rock abruptly slipping on a fault,…
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Source scienceblog.com
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