Hello Marike,
We are due some bigger quakes as there has been an unusual drought of above 6 magnitude quakes for over 80 days now I believe. Wow you are blowing many light-globes! If they are mains powered it is highly possible your voltage is fluctuating due to space weather! There are units to stabilise your voltage if the problems persists [ask if u need help]. I am lucky to be solar powered which actually provides the most excellent "clean" power supply with very stable voltage and frequency - which is great because as a musician with a studio this helps with sensitive equipment and back ground noise.

Have a great day =D