Doing a little more research on the Greek word SEISMOS within a biblical context, I've found Moulton and Milligan's study of the ancient papyri to be helpful. Furthermore, James S. Murray reviews literary, epigraphical, and numismatic evidence for urban earthquakes (particularly in Asia Minor and related areas) in "The Urban Earthquake Imagery and Divine Judgement in John's Apocalypse," Novum Testamentum, Vol. 47, Fasc. 2 (Apr. 2005), pp. 142-161.
But one of the most important articles on this subject has to be Richard Bauckham, "The Eschatological Earthquake in the Apocalypse of John," Novum Testamentum, Vol. 19, Fasc. 3 (Jul. 1977), pp. 224-233.
The latter also provides some context to the biblical use of SEISMOS.