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High Speed Stream
Catalog: M2M_CATALOG
Event Time: 2026-07-22T22:00Z ( SOLAR-1: MAG )

All Detecting Spacecrafts:

SOLAR-1: MAG

ACE: SWEPAM

ACE: MAG

SOLAR-1: SWiPS

IMAP: MAG

IMAP: SWAPI

Activity ID: 2026-07-22T22:00:00-HSS-001 (version 2)
Event End Time:
Peak Solar Wind Speed (km/s): 700.0
Date of first appearance of coronal hole in EUV at east limb: 2026-07-15
Note: Characterized by an increase in solar wind speed from 390 km/s to 700 km/s at 2026-07-23T14:43Z. A subsequent increase in temperature is observed at this time from ~100,000 K to 600,000 K at 2026-07-23T13:43Z. Magnetic field components fluctuate rapidly throughout the signature between about +/-10nT. This signature is preceded by an increase in density, increasing from ~5 p/cc to 16 p/cc. This high speed stream likely originates from a coronal hole spanning N35 to S10 which reached the central meridian on 2026-07-20.

Version 1 submitted on 2026-07-23T16:04Z by Mattie Anastopulos
Version 2 submitted on 2026-07-24T01:54Z by Carina Alden

No Notification has been sent for this activity yet.

All directly linked activities:

2026-07-24T13:40:00-RBE-001

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