India, July 17 -- A powerful earthquake rattled WSW of Puerto Madero, Mexico on Friday. According to Mexico's national seismological service, the earthquake was measured at a magnitude of 7.4 and tremors felt in Guatemala and El Salvador.

The earthquake struck 71 kilometres of Puerto Madero, Mexico. It occurred at a depth of 10 kilometres, as per GeoShake Community Seismic Network. A tsunami threat warning has been issued by the US Tsunami Warning System for certain areas along the Pacific coast.

"Shaking will vary by building and terrain, but shallow quakes often produce broader felt reports. Expect aftershocks in the hours to days ahead. Regional context: 22 earthquakes in this region in the last 30 days; this is the largest magnitude...