According to a preliminary report from the United States Geological Survey, a magnitude 6.4 earthquake has struck Argentina's west-central province of San Juan on Monday night.
A series of aftershocks around the country followed. A magnitude 5.0 aftershock struck 27 kilometers (about 16.8 miles) south-southwest of Nueve de Julio, around 1,000 km (620 miles) east of the first quake and almost 20 minutes later.
Then, a magnitude 4.9 quake came in the same area as the first, followed by a magnitude of 5.3 aftershocks.
The 4.9, 5.0, and 5.3-magnitude quakes are considered aftershocks as they are smaller in magnitude than the main quake and in the same area.
Based on available data, there is no tsunami threat at this time, according to the Pacific Tsunami Warning Center (PTWC).
San Juan Governor Sergio Uñac urged people to stay calm after the quakes hit.
"Let's put into practice all the measures that we have learned to prevent incidents, while we are committed to knowing the impact of the (earthquake) to collaborate in everything necessary," he tweeted.
Uñac added that the province was working with civil and security forces to respond, as well as with municipalities to respond to "take care of them."
In its preliminary statement, the PTWC recorded the quake's depth at about 20 kilometers (12.43 miles).
It was a "strong" quake, said CNN en Espanol reporter Agostina Montaño in San Juan, adding that everything fell off his home's shelves.