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From the alerts sent by SIDC (Solar Influences Data analysis Center).
Last alert:
Issued on 2024 May 11 0002 UTC
Geomagnetic conditions have reached severe storm levels globally (NOAA Kp=9-) starting at 18:00 UTC on May 10. Locally, severe storm levels were recorded (K_Bel=8) from 19:00 UTC to 20:00 UTC and from 22:00 UTC on May 11. Currently, the North-South component (Bz) is at -45nT (23:48 UTC) and follows a further decreasing trend. We may expect an extreme storm levels (k=9) if Bz continues to decrease.
Issued on 2024 May 11 0058 UTC
Geomagnetic conditions have reached extreme storm levels (NOAA Kp=9) globally and severe storm levels (K_Bel=8) locally starting at 21:00 UTC on May 10. Currently, the North-South component (Bz) is at -48nT (00:43 UTC on May 11) and follows a further decreasing trend. Extreme storm levels are possibly expected to continue in the coming hours.
Issued on 2024 May 11 0806 UTC
An X5.8 flare has occurred with a peak time 01:23 UTC on May 11, produced by NOAA AR 3664. Type II and type IV radio emissions were detected at 01:13 UTC and 01:24 UTC, respectively, during the flaring activity. Moderately disturbed radio communications have been observed related to this flaring activity. The greater than 10 MeV GOES proton flux was shortly (01:10 UTC - 02:10 UTC) below the 10 pfu threshold level. It started to increase again from 02:10 UTC and it continues to increase. Both the greater than 50 MeV GOES proton flux and the greater than 100 MeV GOES proton flux began to increase from 01:40 UTC. The greater than 50 MeV GOES proton flux crossed the 10 pfu threshold level at 05:50 UTC and it is increasing. The greater than 100 MeV GOES proton flux is just below the 10 pfu threshold level and it is increasing. The proton flux is expected to remain elevated as more particle events are possible in the coming days.
Maintained by Stéphane Bortzmeyer stephane+gemini@bortzmeyer.org from the SIDC data.
Royal Observatory of Belgium
E-mail sidc-support@oma.be
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