The United States Geological Survey recorded a Magnitude 4.1 Earthquake at a depth of 20.1 km in the northeast of Azerbaijan slightly before 3.15 pm local time (slightly before 10.15 am GMT) on Saturday 14 September 2013). There were not reports of any damage or injuries arising from this quake, though it was felt locally.
The approximate location of the 14 September 2013 Azerbaijan Earthquake. Google Maps.
Earthquakes are a common problem in Azerbaijan, which is located on the southern part of the Eurasian Plate, close to the boundary with the Arabian and Anatolian Plates. The Arabian Plate is being pushed northwards by the movement of the African Plate further to the south, pushing the Anatolian Plate to the west, and creating stress in the rocks around the Caspian Sea Basin, and creating the uplift that has led to the formation of the Caucasus Mountains.
See also Magnitude 4.9 Earthquake under the Caspian Sea, Earthquake beneath the eastern Black Sea, Two major Earthquakes in northeast Iran, leading to heavy death toll and Earthquake in northwest Azerbaijan.
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