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Backup tapes and in production servers are kept at different colocation sites to protect data from fire and other catastrophes of that level
Using colo sites on separate tectonic plates would protect you from catastrophes on a geological cataclysm level
Last time I used tape, we used Ironmountain to haul the tapes 60 miles away which was determined to be far enough for seismic safety, but that was over a decade ago.