“Could this be his proof?”
No. Coincidence is not proof. I think the earthquakes happened as I was making coffee, so I guess making coffee causes earthquakes.
Ben Davidson at Suspicious0bservers.com has a 75% prediction rate on greater than 7.x earthquakes and >50% on 6.x earthquakes. The Mexico earthquake hit one of his prediction zones this morning.
Spaceweathernews.com also has some great information.