Michael the Syrian
reports that in October 1138 CE,
there was an earthquake and towers were destroyed in
Bizaʿah and
Aleppo.
Three sentences later, he describes an episode that may or may
not be related to seismic activity:
In the desert near
Callinice (Raqqa), forty men were traveling;
the earth opened and swallowed them all. Only one survived—he
had turned aside to urinate. The voice of the groans of these
men and their mounts was heard for a long time.
In the following passage, Michael states that
Atharib(?) was again overthrown in this
earthquake; the church of
Harim also collapsed.
He adds that
Azrab, a village situated on the confines of the mountain of
Quros, opened up in the middle, and when the inhabitants had
come out, it collapsed entirely.
Michael also reports that on 29 October 1140 CE there was an
earthquake at an unspecified location. However, since he notes
that on the 10th day of the same month there was a lunar
eclipse, it is possible that the earthquake occurred on or
around 29 October 1139 CE. A total lunar eclipse was visible in
the Near East on 9 October 1139 CE in the Julian calendar,
corresponding to 10 October in the Seleucid Era calendar used
by Michael.