Got hit by a 'Light Earth Quake' (White Giant)

I just had 6 out of 17 corporations destroyed by a "Light Earth Quake". All were CEO corps, I had no state corps in the country. Is this just bad luck or has anyone experienced something similar? Makes me wonder what a large earthquake would have done.

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Factory damaged by Light Earth Quake
The Light Earth Quake had a magnitude of 6.7. Antonio Building Materials 3 is very severely damaged. The factory Antonio Building Materials 3 will be closed down.



Factory damaged by Light Earth Quake
The Light Earth Quake had a magnitude of 6.7. Gaia Advanced Effectivity 44 is very severely damaged. The factory Gaia Advanced Effectivity 44 will be closed down.



Factory damaged by Light Earth Quake
The Light Earth Quake had a magnitude of 6.7. Midgard Weapon Grade Uranium is very severely damaged. The factory Midgard Weapon Grade Uranium will be closed down.



Factory damaged by Light Earth Quake
The Light Earth Quake had a magnitude of 6.7. Midgard Adv Eff Prod 01 is very severely damaged. The factory Midgard Adv Eff Prod 01 will be closed down.



Factory damaged by Light Earth Quake
The Light Earth Quake had a magnitude of 6.7. Midgard Boats is very severely damaged. The factory Midgard Boats will be closed down.



Factory damaged by Light Earth Quake
The Light Earth Quake had a magnitude of 6.7. Midgard Construction is very severely damaged. The factory Midgard Construction will be closed down.

well there are those with conspiracy theories but I dont believe it. Its bad luck, however it could be worse, I've seen a 20M pop. country lose 22 corps to an earthquake.