DONKI Header

CCMC DONKI

DONKI: Menu Page

Go to:

DONKI: View SW Activity

High Speed Stream
Catalog: M2M_CATALOG
Event Time: 2026-09-29T00:34Z ( STEREO A: IMPACT )

All Detecting Spacecrafts:

STEREO A: IMPACT

STEREO A: PLASTIC

Activity ID: 2026-09-29T00:34:00-HSS-001 (version 1)
Event End Time:
Peak Solar Wind Speed (km/s):
Date of first appearance of coronal hole in EUV at east limb:
Note: Characterized by an increase in solar wind speeds from ~350 km/s to ~450 km/s starting around 2026-09-29T00:34Z. This signature is preceded by a corotating interaction region arrival, characterized by an amplification of magnetic field components with Btotal increasing from ~4nT at 2026-09-28T08:32Z to ~11nT at 2026-09-28T11:20Z. A minor increase in density is observed from ~1 to ~5 p/cc around this time as well. The candidate coronal hole spans latitude N05 to S80 and reached the central meridian of the STEREO Ahead-facing disk on 2026-09-25.

Version 1 submitted on 2026-09-29T16:35Z by Mattie Anastopulos

No Notification has been sent for this activity yet.

All directly linked activities:

2026-09-28T08:32:00-IPS-001
Location: STEREO A

Comments by users:

0 comment received.

Insert title here

The Moon to Mars Space Weather Analysis Office and other entities provide data to DONKI as a courtesy to the community.
By visiting this site, you acknowledge that you understand and agree to the Important Disclaimer Notice

If you are looking for the official U.S. Government forecast for space weather, please go to NOAA's Space Weather Prediction Center (https://swpc.noaa.gov). This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.

Curator: Chiu Wiegand | NASA Official: Dr. Masha Kuznetsova | Privacy and Security Notices | Accessibility | CCMC Data Policy