Click the image to see it better. It says it was 69 KM SSW of Mt Redoubt Volcano.
I felt it ever so slightly, then after about 15 seconds it began to rumble very clearly and the lamp moved a bit. And then it slowly faded. I'd guess it went on for 30 seconds. The time is UTC- 2:35 am July 29 which would be 7:35pm Alaska time July 28.