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High Speed Stream
Catalog: M2M_CATALOG
Event Time: 2025-05-27T18:55Z ( DSCOVR: PLASMAG )

All Detecting Spacecrafts:

DSCOVR: PLASMAG

ACE: SWEPAM

ACE: MAG

Activity ID: 2025-05-27T18:55:00-HSS-001 (version 1)
Event End Time:
Peak Solar Wind Speed (km/s): 590.0
Date of first appearance of coronal hole in EUV at east limb: 2025-05-20
Note: Beginning of coronal hole high speed stream effects as evidenced by pile-up/monotonically increasing solar wind density increase with a maximum of ~30 p/cc near 2025-05-27T18:00Z followed by decreasing density and rapidly increasing wind speed from ~420 km/s to 590 km/s over the period 2025-05-27T17:00Z to 2025-05-28T06:00Z with increasing temperature profile. A solar sector boundary is also observed near 2025-05-27T11:00Z.

Version 1 submitted on 2025-05-28T11:16Z by Chris Stubenrauch

No Notification has been sent for this activity yet.

All directly linked activities:

2025-05-27T18:05:00-IPS-001
Location: Earth

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