See photos of the massive power outage that affected millions of people in Spain and Portugal due to an "induced atmospheric vibration."

The Spanish power distributor calls it “exceptional and extraordinary.” Power went down just after noon and by nightfall only half of the power had been restored in Spain. The cause was not immediately clear Monday.

Power and cell phone outages struck across the Iberian Peninsula and other portions of Europe Monday, with disruptions reported in Spain, Portugal, Belgium, Andorra and France.