Spall impacts around the hole made by the projectile. That thing hit the tank's armor hard enough to chip off splinters from the location where it penetrated [think a bb hitting a hard glass window] and drive it into the adjoining armor hard enough to make those surrounding craters. We're probably looking at 5000+ FPS...
M919 25mm APFSDS for Bradley AFV
And if an MI ain't good enough, time to dismount - we will never field anything heavier.