DONKI Header

CCMC DONKI

DONKI: Menu Page

Go to:

DONKI: View SW Activity

Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: Earth
Event Time: 2025-10-27T13:38Z ( ACE: MAG )

All Detecting Spacecrafts:

ACE: MAG

ACE: SWEPAM

DSCOVR: PLASMAG

Activity ID: 2025-10-27T13:38:00-IPS-001 (version 3)
Quality of ICME Signature: 0 (weak signatures)
Note: Characterized by an initial sharp drop in B-total at start time from around 6-7nT to 3.7nT before a slow rise >10nT, reaching a peak 11.1nT at 2025-10-27T23:05Z. Bz has not sustained either northward or southward, swinging between +8.6nT and -8.9nT throughout the signature. An initial in solar wind speed from around 350 km/s to around 375 km/s followed by a gradual rise to around 450 km/s, a gradual rise in temperature accompanying the increase in speed, and a more sharp density increase from around 5p/cc to 25p/cc are all observed alongside the magnetic field enhancement. The source is complex and likely a mix of the later-than-expected glancing blow from CME 2025-10-23T16:38Z modeled to arrive 2025-10-26T13:00Z (+-7 hours), potentially a CIR ahead of a southern coronal hole whose western edge crossed the central meridian on 2025-10-25, and potentially a solar sector boundary crossing with the pile-up, velocity increase, and phi angle flip from 315 to 135 degrees around 2025-10-27T15:22Z.

Version 1 submitted on 2025-10-28T16:53Z by Tony Iampietro
Version 2 submitted on 2025-10-28T16:56Z by Tony Iampietro
Version 3 submitted on 2025-10-29T16:20Z by Hannah Hermann

No Notification has been sent for this activity yet.

All directly linked activities:

2025-10-23T16:38:00-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