💾 Archived View for radia.bortzmeyer.org › presto › 2021-12-19.gmi captured on 2024-06-20 at 13:08:22. Gemini links have been rewritten to link to archived content
⬅️ Previous capture (2023-06-14)
-=-=-=-=-=-=-
Issued on 2021 Dec 19 1345 UTC
A CME was observed in SOHO/Lasco C2 on 18-12-2021 at 18:12UT, following a C6.3-class flare from a region at estimated location S19E89. No Stereo data from that time are available at present. Due to its location, a possible influence could be from a shock, with a low possibility of arrival. In such case, the shock may concide with a possible high speed stream from the negative polarity coronal hole crossing cntral meridian on Dec 18.
Issued on 2021 Dec 19 1656 UTC
A fast forward shock was observed on Dec 19 12:08UT. The solar wind speed jumped from 350 to 380 km/s and the interplanetary magnetic field jumped from 6nT to 8nT. Meanwhile the solar wind speed rose to 420 km/s. The interplanetary magnetic field is currently at 16nT. Bz was initially positive but has turned negative since 15:07UT and currently at -14nT. There is a possibility this could be an effect from the coronal mass ejection observed in LASCO on Dec 16 04:24UT.