As you may or may not have heard on the interwebbytubes, the DC metroplex was rocked by an earthquake that measured 5.8 on the Richter scale this afternoon and was felt as far away as Ontario, Canada. Various and sundry other locales reported the quake as well, from Pittsburgh, PA to Tampa, FL, to Brooklyn and New York, NY. An aftershock measuring 2.8 on the Richter scale was reported a little while later (I don't know how long). This is the second to hit the area in the last couple of years; the quake that occurred in July …