They formed part of the foreshock sequence for the 1960 Valdivia earthquake, the largest recorded earthquake in history.

This earthquake, which lasted 35 seconds, destroyed a third of the buildings in the city of Concepción.

[8] The earthquake effectively interrupted and ended Lota's coal miners march on Concepción where they demanded higher salaries.

[11] Its epicenter was in the Nahuelbuta National Park, Araucanía Region, Chile, and its magnitude was 7.1 Mw.

Its epicenter was near Purén, Araucanía Region, Chile and its magnitude was 7.8 MS or 7.8 Mw.