What kind of implact on the global internet would we see should we observe nearly simultaneous detonation of 500 kilogramms of high explosives at N of the major known interconnect facilities?

Not knowing how much damage would result from 500kg of explosives.. What is the typical size of pipe a carrier would pull into an interconnect facility, how many carriers, how much traffic? Now how much traffic would shift to other facilities if one went down? How many would it take to saturate the pipes? And at what point would congestion be bad enough to render them useless? At some point traffic will shift over to private interconnects either through complete loss of peering in third party facilities, or through manual intervention. Kris