DONKI Header

CCMC DONKI

DONKI: Menu Page

Go to:

DONKI: View SW Activity

Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: STEREO A
Event Time: 2025-09-06T20:41Z ( STEREO A: IMPACT )

All Detecting Spacecrafts:

STEREO A: IMPACT

STEREO A: PLASTIC

Activity ID: 2025-09-06T20:41:00-IPS-001 (version 3)
Quality of ICME Signature: 2 (clear signatures)
Note: Characterized as an initial jump in Btotal from 5.0nT to 11.4nT, reaching a peak Btotal of 16.6nT at 2025-09-06T22:45Z, with Bz sustained northward. Density suddenly increased from a sustained value of about 10 cc to 40 cc at the time of arrival, reaching a peak density of about 50 cc during the arrival, followed by a drop in density to about 3 cc at 2025-09-07T15:00Z. Only a very slight increase in solar wind speed and temperature was observed at the start of the arrival, with the speed rising from about 325 km/s to about 375 km/s. Towards the end of the arrival signature, at about 2025-09-07T09:00Z, both speed and temperature begin to show a more notable increasing trend, followed closely by the aforementioned decrease in density at 2025-09-07T15:00Z. Likely the anticipated arrival of CME 2025-09-04T20:30Z, which had been predicted to give a glancing blow to STEREO A at 2025-09-07T07:00Z (+/-7 hours). This CME was also observed at L1 by ACE at 2025-09-06T13:51Z.

Version 1 submitted on 2025-09-07T01:36Z by Tony Iampietro
Version 2 submitted on 2025-09-07T23:17Z by Anna Chulaki
Version 3 submitted on 2025-09-09T00:01Z by Hannah Hermann

No Notification has been sent for this activity yet.

All directly linked activities:

2025-09-04T20:30:00-CME-001

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