It was quite noticeable in Stillwater, about 60 miles north of the epicenter. Sitting at my desk, the whole building shook for several seconds, hard enough that we checked to see if anyone had driven a truck into the loading dock or some other part of the building. At my parents' house in Norman, it rattled the windows and doors pretty hard. There doesn't appear to have been any major damage.

And USGS had it as a 4.5 and then downgraded it to a 4.3, so that's where the two numbers came from. And now I'm seeing reports that they've upgraded it to a 5.1, which would be one of the strongest in the state's history. (It appears that USGS is saying 4.3 and OGS is saying 5.1, FWIW.)