Speculations have been made that the seal may have arrived in the city during the lockdown and curfew due to the coronavirus pandemic.
Chileans poured into the country’s main squares on Sunday night after voters gave a ringing endorsement to a plan to tear up the country’s Pinochet-era constitution in favour of a new charter drafted by citizens.
For many Chileans, Plaza Baquedano, a broad rotary in central Santiago that for decades served as a centre of social protest, has become a powerful symbol of hope. For two years, city residents have regularly gathered here to protest pensions that are too low, public transit fees that are too high
Police in Chile are training dogs to detect people that may be infected with the novel coronavirus by sniffing their sweat.
A number of people living near the coast were evacuated as a precaution, there were no reports of casualties.
Health authorities in northern Chile have fined two veterinarians they say were giving or promoting canine vaccines as false protection against COVID-19.
The latest emergency order covers the southern region of La Araucania, next to the previously declared Biobio and Nuble regions, located near the middle of the South American country's long Pacific coastline.
The quake hit at a depth of 56.7 km (35.23 miles), the USGS added. EMSC, which first reported the quake, revised down its magnitude to 5.5 from 6.2 earlier.
During a ceremony in Santiago, Pinera said that 30 years of democratic rule in Chile had been a "fertile" period that dragged eight million Chileans out of poverty.