The most dangerous seismic zones with a possible maximum magnitude of 7 on the Richter scale are Kresna, Marishka, Sofia, Gorna Oryahovitsa and Shablansko.
The magnitude of today's quake near Plovdiv on the Richter scale is 4.7. Its depth is 5 kilometers. This is a moderately strong earthquake and this magnitude suggests that there will be aftershocks. It was registered 17 km southeast of Plovdiv and 3 km northeast of Asenovgrad at 15:26.
The strongest earthquakes in the Plovdiv seismic region were from April 1928 - then between April 14 and 25 there were three strong earthquakes with a magnitude between 5.7 and 7.1 on the Richter scale.
Strong earthquake hits Bulgaria
The first quake occurred at 11:20 a.m. on April 14, 1928, with an epicenter about 8 km northwest of Chirpan and a magnitude of 6.8 on the Richter scale. After it, almost all buildings in Chirpan and Borisovgrad (today's Parvomay) were destroyed. On April 18 at 21:20 in the evening there was another strong quake of similar magnitude (7.0 on the Richter scale) and epicenter near Popovitsa. Then a third of Plovdiv was destroyed.
After the tremors, many people live and sleep in the open - in tents of rugs.
The state reacted quickly and adequately to the situation - even personally Tsar Boris III visited the destroyed settlements and remained in Plovdiv, engaging in organizing first aid to the victims. The National Assembly established the Directorate for Assistance and Restoration of the earthquake region, the purpose of which is also the scientific investigation of earthquakes. It finances the construction of public buildings and supports the affected population.
The state allocates BGN 100 million to repair the damage. Within three years, the Directorate managed to almost completely remove the damage from the destruction. About 880 million people are also helping to do so. which Bulgaria receives from the League of Nations.