Top 10Updated 2026年3月17日
Top 10 Largest Solar Flares in Recorded History
This ranking is based on GOES satellite X-ray flux data, documenting the strongest solar flares recorded since 1976. These events represent extreme solar dynamics and serve as critical data for space weather forecasting and the security of global communication and power grids.
Current #1
Nov 4, 2003 (Halloween Storms)
Interesting Facts & Summary
Key Facts & Insights
- Measurement Scale: Solar flares are measured by X-ray flux (W/m²). X-class is the highest, and larger numbers indicate greater power. Modern sensors often face saturation limits.
- The Carrington Mystery: While the 1859 Carrington Event is considered the most powerful in history, it lacks modern satellite data. Current lists are dominated by the 2003 'Halloween Storms'.
- Sensor Limitations: Many extreme flares exceed the detection limit of GOES sensors, often recorded as 'X28+' or similar, implying their actual intensity may significantly surpass official records.
| Rank | Date & Event Name | Flare Magnitude (X-class) | Primary Impact |
|---|---|---|---|
Nov 4, 2003 (Halloween Storms) | 28 | Caused global communication outages and satellite malfunctions | |
April 2, 2001 | 20 | Record-breaking X-ray flux at the time | |
Oct 28, 2003 | 17 | Induced a severe geomagnetic storm | |
| 4 | Sept 7, 2005 | 17 | Intense solar proton event |
| 5 | March 6, 1989 | 15 | Part of the storm series that caused the Quebec blackout |
| 6 | April 15, 2001 | 14 | Accompanied by extremely fast CME |
| 7 | Oct 29, 2003 | 10 | A key event within the Halloween Storms |
| 8 | Sept 6, 2017 | 9.3 | Strongest flare of Solar Cycle 24 |
| 9 | May 24, 1990 | 9 | Caused data overflow in satellite sensors |
| 10 | Nov 6, 1997 | 8.1 | Significantly affected HF radio communications |
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