Significant earthquakes of 1091

September 26, 1091 Earthquake: Antakya (Antioch), Syria, Turkey

September 26, 1091

An earthquake struck Antakya (Antioch), Syria, Turkey on September 26, 1091.

Map

Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.

The earthquake

Date
September 26, 1091
Place
Antakya (Antioch), Syria, Turkey
Intensity
IX, violent shaking, on the Modified Mercalli scale
Tsunami
None recorded
Epicenter
36.100° N, 36.100° E
Country
Turkey
Region
Middle East

The toll

Damage
Severe (about $5 to $25 million)

Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.

What the record says

NCEI’s account, from the sources it cites.

1091. Walls of Antioch thrown down, ninety villages destroyed (reference #1222)

1091 Sep 26, Antioch. A locally damaging earthquake in northwestern Syria during the night. It seems that Antioch bore the brunt, suffering considerable damage and casualties. Many houses and the Church of Our Lady collapsed, but there is no evidence that the shock caused great loss of life. A part of the rampart and 70 or 90 of its outer towers were ruined. The worst damage was to the northwest section of the city walls in the plain between the Gate of the Sea (Bab al-Bahr) and the Gate of Persia (Bab-Faris), which lost 32 towers […] some later writers grossly exaggerate the effects of this earthquake, which does not seem to have affected any other urban centre in what was a heavily populated region […] The earliest source for this event is Sawirus, an eeleeventh-century Egyptian Christian writer. He dates thee earthquake to a.Diocl.808, Sunday 8 Babah (6 October 1091), and give numerous details […] Ibn al-Qalanisi dates this event to a.H. 484, the night of Tuesday 9 Shaban (26 September 1091), ten days earlier than the date given by Sawirus. This disparity may be further evidence of destructive aftershocks. (reference #9116)

Sources NCEI cites

The publications NCEI lists for this record. The numbers match the “reference #” notes in its account above.

  1. #1222 Alsinawi, S.A., S.G. Baban, and A.S. Issa (1985). Historical seismicity of the Arab region. IASPEI/UNESCO Working Group on Historical Seismograms and Earthquakes, August 27-28, 1985, Tokyo; Preliminary Proceedings, p. 59-84.

Other significant earthquakes nearby

Within 200 km, the deadliest first.

More

Significant earthquakes of 1091The 1000sRecent earthquakes near hereThis day in weather history

Sources

Significant earthquakes from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-10-01. NCEI earthquake 374.