Ohio Earthquakes Not Especially Rare

So how rare is a 4.0+ earthquake in Ohio? Roughly one a decade -- here's an interesting page from the USGS, with this chart.

Probably nothing to get excited about.

Here's a entire report on the subject, if you want to read more.

Earthquakes are a legitimate concern in Ohio and parts of adjacent States. Ohio has experienced more than 160 felt earthquakes since 1776. Most of these events caused no damage or injuries. However, 15 Ohio earthquakes resulted in property damage and some minor injuries. The largest historic earthquake in the state occurred in 1937. This event had an estimated magnitude of 5.4 and caused considerable damage in the town of Anna and in several other western Ohio communities.