The earthquake that the Bulgarian capital Sofia experienced at 3 am on Tuesday has been the strongest in its history since 1858, i.e. in 154 years, historical records indicate.
On Tuesday, Bulgaria’s territory saw over 60 weak aftershocks after the 5.8-5.9-magnitude it experienced early Tuesday morning, according to the Geophysics Institute of the Bulgarian Academy of Sciences.
All of the 60 aftershocks had magnitudes of over 1 on the Richter scale, and their epicenters were around the western Bulgarian city of Pernik, where the initial earthquake hit at about 2:58 am on Tuesday. Some of the major aftershocks had a magnitude of 4.2-4.7, and were felt in Pernik and Sofia.
On September 30, 1858, when the future Bulgarian capital was still only a provincial town in the Ottoman Empire, it suffered an earthquake that had an estimated magnitude of 6.6-7.0 on the Richter Scale, damaging some 80% of its buildings.