Magnitude 7.7 earthquake hits Oaxaca, Mexico

Earthquake hits near the pacific coast of Mexico

Earthquake hits near the pacific coast of Mexico
Local reports on Twitter suggest strong shaking. There was earlier shaking today at a magnitude 4.9 but that appears it was just a tremor setting up for this earthquake.
Mexico earthquake reportsAn earthquake of 8.0 in Mexico 1985 killed at least 5000 people, it was located 350 km away.
The epicenter of this one appears to be closer to Oaxaca’s pacific coast, centered near Asunción Tlacolulita.
Update: The USGS early estimate is magnitude 7.7 (then updated to 7.4)
Mexico  USGS map