Very distant quake
This major earthquake hit China near the border with Kyrgyzstan, about halfway to the other side of the planet. The shortest way here on the surface is to go north, cross the Arctic, and then south to Sutton. However, the P wave arced underground and came very close to the outer core. Had it been a few hundred miles further away, the P wave would have entered the core and been refracted away from Sutton and we'd be in a “shadow zone” and wouldn't have seen it.