"No, but you did say there were many spikes. They need not occur in the same place or over some definite period of time to suggest a repetitive nature to the overall phenomenon of spikes. Tides rise and fall but reach different levels, and tides are very cyclic. Your description of spikes makes me think of tides, of a repetitive element to the presence of mana. Cycles, perhaps. Have you heard of Ehran the Scribe's cycle theory?"