Quote Originally Posted by Sotek View Post
It's not Allagan technology.

http://eu.finalfantasyxiv.com/lodest...cc8eb228a2eade


As for why most of the corrupted crystals have Allagan technology nearby; Dalamud was Allagan technology, debris from Dalamud that fell during Brohamuts attack messed with the aether.
Even if it is not made by Allagans, the generator holds the similar aspect of being powered by Aether like the Allagan technology. Everything that has been powered by large amount of Aether seems to generate Corrupt Aether around in some way.