geomag and aurora level

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1. Simbionte (santiago@mastodon.uy)'s status on Monday, 24-Apr-2023 00:38:16 UTC Simbionte

   Tormenta Geo-magnetica severa
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   Severe (G4) Geomagnetic Storm!
   April 23, 2023 @ 17:25 UTC (UPDATED)
   The DSCOVR solar wind data is showing a shock passage at 17:00 UTC and this should be the expected CME reaching the satellite. The solar wind speed is currently near 500 km/s and the Bz component of the IMF continues to point south. An impact to our geomagnetic field is imminent.
   UPDATE #2: A Severe (G4) storm is in Progress. VHF aurora contacts on 2/6m with distorted signals now being made across middle to high latitudes. Widespread aurora across middle to high latitudes once dark outside is likely.

   UPDATE: The anticipated CME swept past Earth at 17:37 UTC. The arrival also pushed proton levels above the minor (S1) radiation storm threshold. With the solar wind now near 550 km/s and the Bz component sharply south (-23nT), moderate (G2) to strong (G3) storm conditions will be possible. Aurora sky watchers should be alert once dark outside.

   ALERT: Geomagnetic K-index of 8, 9-
   Threshold Reached: 2023 Apr 23 1944 UTC
   Synoptic Period: 1800-2100 UTC
   Active Warning: Yes
   NOAA Scale: G4 - Severe

   SUMMARY: Geomagnetic Sudden Impulse
   Observed: 2023 Apr 23 1737 UTC
   Deviation: 48 nT
   Station: BOU

   #astronomy #spaceweather #sun #solaractivity #solar #geomagnetic #storm