The USGS website knows nothing about any “swarm” of 60 earthquakes “across the entire park” “on Friday alone”. It lists about 30 quakes over the past week, all centered on the same Campanula Creek area. This article is bogus.
The USGS has not been reporting a lot of earthquakes lately. I have been following earthquakes around the world for the last 6 months and can tell you the USGS is playing at hiding earthquakes. If you go and see the actual Yellowstone seismographs(which there are several) you will see hundreds of earthquakes at 2.0 or more that USGS has decided to ignore. I actually think this article has been weak in their count but I am surprised they even wrote it.
http://www.freerepublic.com/focus/news/3561891/posts?page=90#90
H/t mewzilla
Also results from Wyoming/usgs site for the last week, in the Lower 48: