The 1928 Chirpan–Plovdiv earthquakes struck central Bulgaria, south of Sredna Gora on April 14 and 18, respectively. The two largest earthquakes both had moment magnitudes of 7.1 (Mw). Major damage was reported, with over 70,000 buildings collapsing. An estimated 127 people died in both earthquakes and many thousands were affected in its aftermath. The two earthquakes were also felt in Greece, where they caused significant damage. The cost of damage totaled 5 billion leva.
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