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@THobbsGeo @seismo_steve There have been several attempts to explain this, e.g. https://t.co/5CNwpiPePo and https://t.co/ZrgjIyXAbW
@THobbsGeo @seismo_steve There have been several attempts to explain this, e.g. https://t.co/5CNwpiPePo and https://t.co/ZrgjIyXAbW