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High Speed Stream
Catalog: M2M_CATALOG Event Time: 2025-10-11T21:30Z ( ACE: SWEPAM ) Event End Time: Peak Solar Wind Speed (km/s): 800.0 Date of first appearance of coronal hole in EUV at east limb: 2025-10-03 Note: Characterized by an increase in solar wind speed from 450 km/s at 2025-10-11T21:30Z to ~800 km/s at 2025-10-12T05:19Z. A subsequent increase in temperature is observed from ~150,000 K at 2025-10-11T21:30Z to ~600,000 K at 2025-10-11T23:00Z. This signature is likely preceded by the arrival of a corotating interaction region starting around 2025-10-11T08:42Z where an amplification of magnetic field components is observed (Btotal increases from 8nT at 2025-10-11T08:42Z to 17nT at 2025-10-11T18:00Z) alongside an increase in density to about 20 p/cc. This signature is likely associated with the arrival of an equatorial coronal hole spanning S10 to N30 which reached the central meridian on 2025-10-08. Version 1 submitted on 2025-10-12T14:26Z by Mattie Anastopulos Version 2 submitted on 2025-10-13T15:40Z by Mary AronneNo Notification has been sent for this activity yet. |
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