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High Speed Stream
Catalog: M2M_CATALOG Event Time: 2023-11-06T11:47Z ( ACE: SWEPAM ) Event End Time: Peak Solar Wind Speed (km/s): 750.0 Date of first appearance of coronal hole in EUV at east limb: 2023-10-29 Note: Strong high speed stream characterized by an increase in speed at ACE from an already elevated 420 km/s to around 750 km/s alongside a temperature increase, and drop in density after a small increase. The magnetic field components at this time were already greatly elevated from CME arrivals on 2023-11-05, so it is unclear if an SIR further contributed to this elevation at this time and is under more analysis. Associated with a large S-shaped coronal hole whose center crossed the meridian on 2023-11-05, spanning approximately N10->S35 and E18->W18 at 2023-11-05T06:00Z. The more equatorial portion crossed the meridian earlier on 2023-11-04. DSCOVR observes the start of this event but the data becomes unreliable around 2023-11-06T15:58Z and the further speed increase is only observed at ACE. Submitted on 2023-11-07T14:28Z by Tony Iampietro No Notification has been sent for this activity yet. |
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