Had an interesting experience yesterday afternoon. Sitting at my desk--felt my desk chair kind of rock--thought mm that was strange--rocked again, felt a bit of vertigo and that was it. Told a co-worker we must have had a thunderstorm go thru or there was an earthquake. He said he didn't notice anything. Heard on the news that we had indeed had a small earthquake. That was a first for me! Ride home was humid and for the most part uneventful. Pleasant ride in this morning.