A strong magnitude 6.0 earthquake shook southern Mexico and the nation’s capital early on Saturday, prompting people to flee into the streets in the dead of night two days after a similar tremor.
There were no immediate reports of damage or injuries following the quake, which struck as people slept at 2.36am local time.
The US Geological Survey, which monitors earthquakes worldwide, said the epicentre was seven kilometres west of Tecpan de Galeana in the southern state of Guerrero, at a depth of 35 kilometres.
Mexico’s National Seismology Service had measured it at 6.3 and later revised it down to 5.9, closer to the USGS’s assessment.
“The states of Guerrero, Morelos, Oaxaca and the Federal District [Mexico City] have not reported any damage,” said national civil protection co-ordinator Luis Felipe Puente.
The earthquake rattled people out of their sleep and tormented those awake at bars.
“It felt horrible. I almost fell and I haven’t even had much to drink,” said Adriana Mendoza, a 21-year-old outside a bar in downtown Mexico City that was not evacuated.
A 6.4-magnitude quake hit the country on Thursday, centered 15 kilometres from Tecpan de Galeana, causing a bridge to collapse in Guerrero but sparing the country from major damage or injuries.
The new tremor came three weeks after a powerful 7.2-magnitude earthquake shook the capital and the Pacific resort of Acapulco on April 18, causing panic but no major damage.
Mexico City is sensitive to distant earthquakes because it was built over soft soil from a drained lake that magnifies their effect.
In 1985, thousands of people were killed in the capital when buildings collapsed after an 8.1-magnitude tremor struck the Pacific coast.