💾 Archived View for gemini.bortzmeyer.org › presto › 2023-07-14.gmi captured on 2024-07-09 at 00:25:03. Gemini links have been rewritten to link to archived content
⬅️ Previous capture (2023-07-22)
-=-=-=-=-=-=-
Issued on 2023 Jul 14 1022 UTC
A faint full halo coronal mass ejection (CME) was first observed in LASCO/C2 coronagraph data at 06:24UTC on July 13th. The CME is bask-sided and no impact on Earth is expected. Another faint and slow westward partial halo CME was observed to lift off the solar surface at 13:48 UTC on July 13th. The CME seems related to a filament eruption near the north-west limb. Preliminary analysis based on the source location suggests that the CME will not impact Earth.
Issued on 2023 Jul 14 1728 UTC
A fast forward shock was observed in the solar wind parameters at 15:25 UTC on July 14th. The solar wind velocity increased from 386 km/s to 480 km/s. The interplanetary magnetic field jumped from 8 nT to 14 nT. The solar wind density jumped from 9 ppc to 16 ppc. The current density is at 32 ppc, while velocity is 443 km/s and both continue increasing. The shock possibly marks an expected glancing blow from the southward partial halo CME which lifted off the solar surface around 19:24 UTC on July 11th following an earlier filament eruption near NOAA 3363. The ICME arrival is expected to result in minor geomagnetic storms with possibility of reaching moderate storm levels. A high speed stream arrival from a negative polarity coronal hole is also expected within the next 24 hours and its signatures could be mixed within the ongoing glancing blow.