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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG Location: Earth Event Time: 2024-02-11T01:18Z ( DSCOVR: PLASMAG ) Quality of ICME Signature: -1 (unspecified) Note: Sudden jump in B-total from 4nT to 17nT, with fluctuating Bz predominantly in the negative regime. Simultaneous sudden increase in solar wind speed from ~350km/s to about 460km/s and has continued to climb in the hours following. Gradual increase in density leading up to shock arrival, with sudden increase at 2024-02-1101:19Z from 17 N/cc to 52 N/cc. Corresponding increase in temperature at 2024-02-11T01:19Z. DSCOVR was primary spacecraft for solar wind data at the time of this arrival and has remained as such at the time of this entry. This arrival was also observed at ACE. Source of this arrival is unclear, as there have been several eruptions recently, but candidates include a possible glancing blow from the shock component of the CME:2024-02-09T13:23Z associated with the X3.3 flare, or possibly but less likely from two minor instances of dimming on the Earth-facing disk at 2024-02-08, both of which appear too slow and/or minor to have caused such a significant increase in the solar wind. This arrival is tentatively attributed to the arrival of 2024-02-09T13:23Z CME. Submitted on 2024-02-12T17:44Z by Anna Chulaki No Notification has been sent for this activity yet. |
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