- Power restored across Spain and Portugal after hours of widespread power outage Computing UK
- Spain rules out cyber-attack as cause of power outage as travel chaos continues – live updates BBC
- In the Madrid power cuts, I saw patience and common sense – but we were woefully unprepared | María Ramírez The Guardian
- Did ‘induced atmospheric vibration’ cause blackouts in Europe? An electrical engineer explains the phenomenon The Conversation
- Spain and Portugal focus on cause of huge blackout with power almost fully restored AP News