This strong quake destroyed all the churches and many of the factories in the area. In San Carlo more than 350 families lost their houses.Within the next nine days, there were six aftershocks exceeding magnitude 5, 28 of magnitude 4–5 and 139 of magnitude 3–4.
The earthquake was felt in most of Northern Italy, triggering evacuation of schools and other buildings.
Some buildings in the Modena province and neighbouring areas, already damaged in the first earthquake, collapsed.
Five of the deaths were caused by the collapse of recently constructed factory buildings.
Stefano Gresta, president of the National Institute of Geophysics and Volcanology, deemed it "unacceptable that modern constructions such as warehouses and industrial sheds have collapsed in an earthquake which was strong, but not exceptional".
After the main shock of 20 May, inspections were underway to determine which buildings were safe to reenter.
The 29 May earthquake occurred during the daytime, when many people were working.As in the mainshock of 20 May, many of the dead in the 29 May earthquake were workers inside huge warehouses and factories.A local union representative has demanded an investigation to determine who was responsible for permitting the companies to resume operations.The 20 May earthquake sequence began with a magnitude 4.0 foreshock at local time ( UTC 19 May).Less than three hours later, at local time ( UTC) the biggest of these earthquakes occurred with magnitude 6.1 between Finale Emilia (province of Modena) and Sant'Agostino (province of Ferrara).The city grew wealthy from trade caravans; the Palmyrenes were renowned merchants who established colonies along the Silk Road and operated throughout the Roman Empire.