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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: STEREO A
Event Time: 2025-09-25T04:26Z ( STEREO A: IMPACT )

All Detecting Spacecrafts:

STEREO A: IMPACT

STEREO A: PLASTIC

Activity ID: 2025-09-25T04:26:00-IPS-001 (version 2)
Quality of ICME Signature: 2 (clear signatures)
Note: Sharp increase in B total from 6nT to 12nT (and eventually to just under 20 nT), accompanied by a drop in density from 7 to 2 p/cc, and rotation of at least two magnetic field components - all indicative of a CME arrival (possibly arrival of a flux rope). Solar wind speed remains under 350 km/s. Candidate CME is 2025-09-21T22:36Z CME which was predicted to arrive 2025-09-25T06Z.

Version 1 submitted on 2025-09-25T13:15Z by Anna Chulaki
Version 2 submitted on 2025-09-25T14:30Z by Anna Chulaki

No Notification has been sent for this activity yet.

All directly linked activities:

2025-09-21T22:36:00-CME-001

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