About nine hours after the magnitude-7.8 quake, a magnitude-7.5 earthquake struck northeast of the 7.8 mainshock.

About nine hours after the magnitude-7.8 quake, a magnitude-7.5 earthquake struck northeast of the 7.8 mainshock.

About nine hours after the magnitude-7.8 quake, a magnitude-7.5 earthquake struck northeast of the 7.8 mainshock.