Solar Storm
Reported by CDAW Data Center, NASA (SOHO/LASCO CME catalogue) 147 days ago.
What the source measured
CDAW Data Center, NASA (SOHO/LASCO CME catalogue) reported: Coronal Mass Ejection detected at 2026-06-04T17:23Z. Linear speed: 1009 km/s. Half-angle: 18°. Full halo CME — potential global geomagnetic impact. Fast, narrow CME first seen to the SW in STEREO A COR2 and to the S in SOHO LASCO C2/C3 and GOES CCOR-1 imagery. A potential source is visible as moving/opening field lines along the southern limb in
How we know
One source: CDAW Data Center, NASA (SOHO/LASCO CME catalogue). Not yet confirmed by a second, independent source.
Our own score for this event is 15 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 | High |
| Calamity Score (ours) | 15 / 100 |
| Legacy data-support index | 0.50/1 |
| Timestamp | 2026-06-04T17:23:00.000Z |
| Source | https://ccmc.gsfc.nasa.gov/DONKI/view/CME/46644/-1 |
| Licence | US public domain (NASA) · CDAW Data Center, NASA (SOHO/LASCO CME catalogue) |
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: soho_lasco. Occurrence: 2026-06-04T17:23:00.000Z.
First archived: 2026-06-08T00:52:01.692Z. 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
| ActivityId | 2026-06-04T17:23:00-CME-001 |
| SpeedKms | 1009 |
| HalfAngleDeg | 18 |
| IsHalo | true |
| EarthDirected | false |
| EventType | cme |
| Note | Fast, narrow CME first seen to the SW in STEREO A COR2 and to the S in SOHO LASCO C2/C3 and GOES CCOR-1 imagery. A potential source is visible as moving/opening field lines along the southern limb in GOES SUVI 284 after the start time of the CME from STEREO A's perspective. Additionally, there is an |
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.