Solar Storm R2
Reported by NOAA Space Weather Prediction Center yesterday.
What the source measured
NOAA Space Weather Prediction Center reported: R2 radio blackout. Minor HF radio fade at low frequencies.
How we know
2 recorded sources include NOAA Space Weather Prediction Center; independence is not established by this count.
Our own score for this event is 33 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Event data
| Type | Solar Storm |
| Severity | High |
| Calamity Score (ours) | 33 / 100 |
| Legacy data-support index | 0.67/1 |
| Timestamp | 2026-10-08T16:04:08.200Z |
| Source | https://www.swpc.noaa.gov/products/alerts-watches-and-warnings |
| Licence | US public domain · NOAA Space Weather Prediction Center |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: swpc. Occurrence: 2026-10-08T16:04:08.200Z.
First archived: 2026-08-28T08:26:01.778Z. Material modification: 2026-10-09T21:42:44.666Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-10-09T21:42:44.666Z · data change
Severity Low → High.
2026-10-09T21:37:17.810Z · data change
Severity High → Low.
2026-10-09T17:38:15.129Z · data change
Severity Low → High.
2026-10-09T17:32:48.796Z · data change
Severity High → Low.
2026-10-08T16:07:56.042Z · model change
Index 39 → 33; version 1 → 5.
1 retained revision changed source fields this page does not show; the index, severity and version stayed the same.
Score breakdown
Technical details
| Scale | R2 |
| EventType | radio_blackout |
| Donki Scale | R2 |
| Donki ClassType | M6.7 |
| Donki EventType | radio_blackout |
| Donki SourceLocation | N12W20 |
| Donki DonkiId | 2026-10-08T15:29:00-FLR-001 |
| Donki RadioRisk | limited_blackout |
| Goes Xray FlareClass | M6.7 |
| Goes Xray Letter | M |
| Goes Xray Level | 6.74 |
| Goes Xray PeakFluxWm2 | 0 |
| Goes Xray EnergyBand | 0.1-0.8nm |
| Goes Xray EventType | solar_flare |
| Soho Lasco ActivityId | 2026-10-08T20:12:00-CME-001 |
| Soho Lasco SpeedKms | 453 |
| Soho Lasco HalfAngleDeg | 38 |
| Soho Lasco IsHalo | false |
| Soho Lasco EarthDirected | false |
| Soho Lasco EventType | cme |
Safety information
What to do in a solar storm
A solar storm is not dangerous to people on the ground: it can disturb power, radio and satellite navigation. What to do, from FEMA’s Ready.gov.
For this reportSolar Storm
Nothing to fear outdoors
The atmosphere protects people on the ground; you may even see an aurora.
NOAA SWPCBe ready for a power cut
Torch, batteries, charged phone, and a plan for medical devices that need power.
Ready.govDo not rely only on GPS
Satellite navigation and radio can be wrong or drop out for a while.
Ready.gov
Before, during, after. Here it is “after”.
Before · When a storm is forecast
Charge what matters
Phones and power banks.
Medicines and devices
Ask your doctor how to store medicines and run devices without power.
Ready.gov (FEMA)
During · During the storm
Save electricity
If authorities ask, to avoid rolling blackouts.
Ready.gov (FEMA)
After · After a long power cut
Check the food
Throw away what stayed above 4 °C for more than two hours.
Ready.gov (FEMA)
If a life is in danger
Call your local emergency number
Questions people ask
Is a solar storm dangerous for my health?
No, not on the ground. It concerns power grids, satellites, radio and, at high latitudes, aircraft crews. Source: NOAA Space Weather Prediction Center.
Will I see the northern lights?
In strong storms the aurora can be seen far from the poles. Look north (south in the southern hemisphere) on a dark, clear night.