Here's a NASA story about the March 13, 1989 power outage in Quebec. It was caused by the second-biggest (X-20) recorded flare. https://www.nasa.gov/topics/ear

Here's a NASA story about the March 13, 1989 power outage in Quebec. It was caused by the second-biggest (X-20) recorded flare. https://www.nasa.gov/topics/earth/features/sun_darkness.html https://www.nasa.gov/topics/earth/features/sun_darkness.html The biggest recorded (X 28-45; Nov 4 2003) took out 12 transformers in South Africa. (It's been compared to 1859 Carrington.) https://en.wikipedia.org/wiki/List_of_solar_storms https://en.wikipedia.org/wiki/List_of_solar_storms Lloyd's did a 2013 report for North America, looks like that's kept updated. https://assets.lloyds.com/assets/pdf-solar-storm-risk-to-the-north-american-electric-grid/1/pdf-Solar-Storm-Risk-to-the-North-American-Electric-Grid.pdf https://assets.lloyds.com/assets/pdf-solar-storm-risk-to-the...