Swarms back then (before the newest update) were appearing most of them between 2h30-6h30, but now it seems they have some pattern that reppeats (not sure yet, but they alternate 5-5-6-6-5-5...).
If we missed a swarm at 00:10 EDT (aprox) then my theroy is correct, because Squirtle swarm was (almost) 6 hours after that.
Next swarm should be in 5h 30min, and the next one in 10h30min.
Ponyta Swarm at Route 22.
Seems that Swarms are now cyclical (since yesterday update, new swarms appear after 5 or 6 hrs)
Tangela- after 5hrsMawile - after 6hrs Haunter - after 6 hours Sableye- after 5 hours Ponyta
So my guess is that next swarm will be in 5 or 6 hours (5 more prob, so 00:10 EDT + or -))
Tangela swarm in safari
Ended after 20 min + or - (Same)
It seems they had a low rate ( + or - 4 tangela of 40-50 pokes, checked the 4 zones, only found Tangela in zone 3 (Tauros+kanga zone), maybe I had just been unlucky)
I think I don't deserve the 2nd price, due to I have lost in 3rd Round. It wouldn't be fair for TheBloo/homicidio/TopQuake who have lost in the same round as me, so I won't accept it.