After an earthquake shook the provincial borders of Tehran and Semnan, the head of Red Crescent Rescue Operations announced that both provinces are in a state of alert.
ILNA reports that according to Nasser Charkhsaz, an earthquake measuring 4.1 on the Richter scale at a depth of 13 kilometres hit the border regions of Tehran and Semnan.
He added that as a result, Tehran is now under orange alert and Semnan under yellow alert.
He said three earthquakes measured at 3.1, 4.1 and 3.4 on the Richter scale have been registered in this region.
Tehran is located on 12 major fault lines and several minor ones, creating the possibility of a major earthquake. Reports indicate that eight million Tehran residents live in very dangerous zones in the eventuality of an earthquake.
Historical data reveal that an earthquake occurs in the Tehran region about every 158 years, and the last time the region was hit was in 1830, when the earthquake was measured at 7.2 on the Richter scale.