February 4, 1976, Guatemala
The earthquake of magnitude 7.5 stars died more than 22 thousand people, and 70,000 were injured. Damage estimated at 1.1 billion dollars.
Valdivia was a 9.5, not 9.6.
Also: Alaska, 1964: 9.2 and Kamchatka, Russia, 1952: 9.0.
Damn Earth.
BTW, the latest earthquake had a magnitude of 9 not 9.1.