Solar Storm
Reported by NASA CCMC DONKI 152 days ago.
What the source measured
NASA CCMC DONKI reported: M1.1 solar flare detected. Minor HF radio degradation on sunlit side of Earth.
How we know
2 recorded sources include NASA CCMC DONKI; independence is not established by this count.
Our own score for this event is 22 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 v1. 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.55/1 |
| Timestamp | 2026-05-29T07:04:00.000Z |
| Source | https://ccmc.gsfc.nasa.gov/DONKI/view/FLR/46457/-1 |
| Licence | US public domain (NASA) · NASA CCMC DONKI |
Physical priority index · v1. 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: donki. Occurrence: 2026-05-29T07:04:00.000Z.
First archived: 2026-06-01T04:49:40.871Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score breakdown
Technical details
| Scale | R1 |
| ClassType | M1.1 |
| EventType | radio_blackout |
| SourceLocation | N14E62 |
| DonkiId | 2026-05-29T06:40:00-FLR-001 |
| RadioRisk | minor_degradation |
| Goes Xray FlareClass | M1.2 |
| Goes Xray Letter | M |
| Goes Xray Level | 1.17 |
| Goes Xray PeakFluxWm2 | 0 |
| Goes Xray EnergyBand | 0.1-0.8nm |
| Goes Xray EventType | solar_flare |
| MergedSources | [{"id":"goes_xray_M1.2_29667304","source":"goes_xray","severity":"medium","severityValue":50,"timestamp":1780038240000,"latitude":0,"longitude":0}] |
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.