NEW : The earthquake is an aftershock of a 7.4-magnitude quake that struck March 20 . The quake 's epicenter was about 17 miles from Ometepec , Guerrero . MEXICO CITY (AP) — Residents in Mexico City felt the temblor .
NEW : The earthquake is an aftershock of a 7.4-magnitude quake that struck March 20 . The quake 's epicenter was about 17 miles from Ometepec , Guerrero . There are no immediate reports of injuries or major damage . Residents in Mexico City felt the temblor .