More than half of the explosions also produced a coronal mass ejection (CME). Earth dodged them all. Only one and maybe two delivered glancing blows of no consequence. All the rest sailed harmlessly into space.
The simple reason why: AR3088 was never facing Earth. Most of the explosions occurred while the sunspot was approaching or even rounding the sun's western limb.
If the sunspot had been facing us, we might now be experiencing strong geomagnetic storms with spectacular low-latitude auroras. Maybe next time...