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High Speed Stream
Catalog: M2M_CATALOG Event Time: 2025-06-11T11:25Z ( ACE: MAG ) Event End Time: Peak Solar Wind Speed (km/s): 490.0 Date of first appearance of coronal hole in EUV at east limb: Note: This brief coronal hole high speed stream is likely associated with SWPC Coronal Hole 56 which crossed the central meridian on 2025-06-08. The signature is characterized by an amplification of magnetic field components with Btotal increasing from 5nT at 2025-06-11T11:25Z to 11nT at 16:08Z. A subsequent increase in solar wind speed is observed from ~400 km/s at 2025-06-11T11:25Z to ~490 km/s at 17:30Z. Increases in temperature and density are also observed alongside the increases in Btotal and speed, with temperature increasing to about 200k and density reaching about 8 p/cc. The end of the coronal hold high speed stream is likely some time around/after 2025-06-12T12:00Z Version 1 submitted on 2025-06-13T12:14Z by Tony Iampietro Version 2 submitted on 2025-06-14T00:11Z by Anna ChulakiNo Notification has been sent for this activity yet. |
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