There appears to be a swarm at Mt. Hood currently. It would appear that the location of todays 4.5 is the largest quake in that area in the past 30+ years. I think it's been around 137 years since Mt. Hood had any significant eruptive activity. Todays quakes are in the same location as the swarm in 1999 which is about 4 miles SSE of the summit I believe. It will be interesting to see if anything more comes of this.