The earthquakes that shook the Roman world in the reign of Justinian are described or mentioned by Procopius, (Goth. l. iv. c. 25 Anecdot. c. 18,) Agathias, (l. ii. p. 52, 53, 54, l. v. p. 145-152,) John Malala, (Chron. tom. ii. p. 140-146, 176, 177, 183, 193, 220, 229, 231, 233, 234,) and Theophanes, (p. 151, 183, 189, 191-196.)