- Cause of Spain power outage still unclear after mass blackout, travel chaos The Washington Post
- Power is back on in Spain and Portugal, but questions remain about Monday’s blackout. Here’s what we know CNN
- Spain-Portugal power outage: British expat describes experience BBC
- The mechanics behind Spain’s mega-blackout politico.eu
- Did ‘induced atmospheric vibration’ cause blackouts in Europe? An electrical engineer explains the phenomenon The Conversation
Cause of Spain power outage still unclear after mass blackout, travel chaos – The Washington Post
