NOAA's Space weather Prediction Centre recorded G1-to-G2 geomagnetic storming from a co-rotating interaction region and an R1 radio blackout on 10 April, the day of Orion's re-entry 1. The storming enhanced the re-entry dose profile without posing direct crew risk. The geomagnetic background on re-entry day forms part of the nine-day dose record that NASA has deferred to a research solicitation . The Space weather context adds to what makes the radiation non-disclosure significant: the withheld data covers a geomagnetically active final day, not a quiet passage.
11APR
G1 to G2 storming on Orion re-entry day
1 min read
13:15UTC
Geomagnetic activity enhanced the crew's re-entry dose profile, adding to the nine-day radiation record that NASA has deferred to peer review.
ScienceDeveloping
Key takeaway
Active space weather on landing day is now part of the withheld dose record.
Deep Analysis
In plain English
Space weather is not just an astronaut concern. Storms in Earth's magnetic field, caused by solar wind, affect radio communications and can enhance radiation exposure for spacecraft and aircraft flying polar routes. On 10 April 2026, the day Orion re-entered Earth's atmosphere and the crew splashed down, NOAA's Space Weather Prediction Centre recorded a G1-to-G2 geomagnetic storm and a separate R1 radio blackout. These are on the lower end of the five-point severity scale, meaning they posed no direct risk to the crew or the mission. Orion's re-entry and recovery proceeded normally. What makes the event notable is the context: the radiation dose data that NASA has deferred to peer review covers the entire nine-day mission, including this final active day. It is not possible to know from public information how much the re-entry day storm contributed to the crew's total dose.
What could happen next?
Active space weather on re-entry day strengthens the argument for faster public release of mission radiation data, as the deferred dataset now covers a confirmed geomagnetically active period.
First Reported In
Update #9 · First crewed Moon return since Apollo 17
NOAA Space Weather Prediction Centre· 11 Apr 2026
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