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48462 |
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Date: September 16, 2024 at 22:08:40
From: pamela, [DNS_Address]
Subject: Severe (G4) geomagnetic storm conditions observed following a CME pass |
URL: https://www.solarham.com |
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Severe (G4) geomagnetic storm conditions observed
following a CME passage Monday evening.
September 16, 2024 @ 23:10 UTC (UPDATED)
A little later and slower than expected, the CME
associated with the X4.5 solar flare on Saturday passed
the ACE spacecraft at 22:49 UTC (Sept 16). Solar wind
speed initially looks to have increased to above 500
km/s. A passage past Earth is expected within the hour.
Great timing for aurora sky watchers across Europe and
North America. Let us just hope that the Bz/IMF
component cooperates. Stay tuned for updates.
CME Impact: Magnetometers detected a geomagnetic sudden
impulsive measuring 39 nT around 23:30 UTC (Sept 16).
This is the moment that the X4.5/CME passed Earth.
Severe (G4) geomagnetic storming was observed. Despite
the full moon, vivid displays of aurora have been
reported across many locations. Below is photo of myself
with an excellent display captured around 03:00 UTC
(Sept 17) from near Cornwall, Ontario. Sky watchers at
middle to high latitudes should remain alert tonight.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 Sep 17 0257 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2024 Sep 16 2329 UTC
Deviation: 39 nT
Station: BOU
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Responses:
[48463] [48464] |
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48463 |
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Date: September 16, 2024 at 22:25:59
From: Eve, [DNS_Address]
Subject: Re: Severe (G4) geomagnetic storm conditions observed following a CME... |
URL: https://www.spaceweather.gov/communities/aurora-dashboard-experimental |
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Photon (kp) index is way up at the time of this post almost to 8.
relationship between kp and aurora:
https://www.spaceweather.com/glossary/kp.html
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Responses:
[48464] |
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48464 |
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Date: September 17, 2024 at 16:29:40
From: pamela, [DNS_Address]
Subject: Re: Severe (G4) geomagnetic storm conditions observed following a... |
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Responses:
None |
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