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High Speed Stream
Catalog: M2M_CATALOG
Event Time: 2025-03-01T03:40Z ( STEREO A: IMPACT )

All Detecting Spacecrafts:

STEREO A: IMPACT

STEREO A: PLASTIC

Activity ID: 2025-03-01T03:40:00-HSS-001 (version 2)
Event End Time:
Peak Solar Wind Speed (km/s):
Date of first appearance of coronal hole in EUV at east limb: 2025-02-23
Note: Complex, large arrival signature starting around 2025-02-28T19:32Z at STEREO A characterized by an increase in magnetic field strength to near 20 nT shortly before a large data gap lasting until 2025-03-01T03:30Z, when total field rapidly increases to over 30 nT, reaching a peak of 35 nT around 2025-03-01T04:00Z. The density and velocity parameters are characterized by a "pileup" signature with density gradually increasing and velocity relatively stable before the data gap, followed by density quickly dropping off and velocity increasing after the data gap. Also contains a likely solar sector boundary crossing as evidenced by phi angle flip in IMPACT/PLASTIC data. High speed stream starts around 2025-03-01T03:40Z. This signature predominantly looks to be effects of a coronal hole high speed stream and embedded solar sector boundary crossing, but may additionally be associated with a CME arrival, possibly that of CME: 2025-02-26T06:48Z.

Version 1 submitted on 2025-03-01T14:35Z by Chris Stubenrauch
Version 2 submitted on 2025-03-01T14:48Z by Chris Stubenrauch

No Notification has been sent for this activity yet.

All directly linked activities:

2025-02-28T19:32:00-IPS-001
Location: STEREO A

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