Bar Hebraeus repeated a
story written by
Michael the Syrian, but
dated it a year or two later than Michael.
Bar Hebraeus wrote that in
A.G. 1451 (1 October 1139 to 30 September 1140 CE),
the earth was rent in the country of Calonicus
(Raqqa), and it swallowed up forty horsemen
with their horses, and only one who had turned aside to make
water was saved. And the sound of the groans of men and their
horses came up for a long time.
Like Michael, Bar Hebraeus did not state that this event was
caused by or related to an earthquake.