Mexican authorities are reporting damage in a southern town from Friday's magnitude 7.2 quake.
A powerful magnitude-7.2 natural disaster shook south and central Mexico on Friday Feb. 16, causing people to flee buildings and office towers in the country's capital, where residents were still jittery after a deadly quake five months ago.
The pilot - who was taking Mexican Interior Minister Alfonso Navarrete Prida and Oaxaca's governor Alejandro Murat out to survey the quake's damage - lost control of the craft and keeled over, crashing into an open field.
Recovery efforts are still being carried out in Oaxaca as well as Mexico City after strong earthquakes in September killed several hundred people and toppled buildings.
Thirteen people, including three children, have been killed after a helicopter carrying a Mexican government minister crash landed near the epicentre of last night's natural disaster.
Another 15 people were injured in the accident.
Navarrete said about 998,000 people nationwide are left without power. There are no immediate reports of serious damage and casualties. "What do I do?" Another 7.1 magnitude quake hit Mexico City 11-days later, killing at least 300 people.
The National Seismology Service said the epicentre was about 145km from the Pacific coast surfer resort Puerto Escondido and the sustained shaking gave way to 194 aftershocks. Some residential buildings in Oaxaca were damaged.
Mexico sits at a spot where five tectonic plates come together, making it particularly vulnerable to earthquakes.
The dead include a six-month-old baby and a 10-year-old girl. No buildings collapsed, according to early reports.