Two major earthquakes concerned Teggiano 's territory : the Neapolitan earthquake that occurred on December 16 , 1857 ( estimated of magnitude 6.9 on the Richter Scale ) , and the Irpininan earthquake on November 23 , 1980 ( measuring 6.89 on the Richter Scale )
Neapolitan earthquake
1857 Basilicata earthquake
Teggiano