Gas prices Spike!

I drive a 2006 Scion Xb that gets 40mpg so Ive found myself having to fill up my tank much less often, in fact I think its been close to two weeks since my last fill up. The price then was 3.46gal so naturally I was it utter SHOCK when I Looked down at the price of fuel today. Of course I only put $10 in fuel giving me roughly only a quarter tank of gas, Im hoping it falls faster than it went up. How much has fuel gone up in your area?