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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: Earth
Event Time: 2025-12-10T20:00Z ( ACE: MAG )
All Detecting Spacecrafts:
ACE: MAG
ACE: SWEPAM
DSCOVR: PLASMAG
Activity ID: 2025-12-10T20:00:00-IPS-001 (version 5)
Quality of ICME Signature: 1 (lacks some signatures)
Note: Characterized by a sharp enhancement in magnetic field components: B total increases from the already elevated 10nT to over 17nT. There is a clear rotation of all three magnetic field components, with Bz turning negative (reaching -15.9nT) for multiple hours. The B_total reached a maximum of 21.8nT. There is a more minor corresponding increase of solar wind speed (from 400 to 470 km/s) and ion density (from 7 to 20 p/cc) and no clear response in ion temperature component, as seen by ACE, however DSCOVR shows a drop in ion density and temperature. This signature is possibly the arrival of one or two CMEs predicted to arrive close to this time.
Version 1 submitted on 2025-12-10T20:36Z by Anna Chulaki
Version 2 submitted on 2025-12-10T23:46Z by Anna Chulaki
Version 3 submitted on 2025-12-11T00:06Z by Anna Chulaki
Version 4 submitted on 2025-12-11T02:14Z by Anna Chulaki
Version 5 submitted on 2025-12-12T02:28Z by Mary Aronne
	
A Notification with ID 20251210-AL-002 was sent on 2025-12-10T20:47Z

All directly linked activities:
2025-12-08T01:38:00-CME-001
2025-12-08T05:12:00-CME-001
2025-12-10T21:00:00-GST-001
NOAA Kp: 6.33 (2025-12-11T00:00Z)
NOAA Kp: 5.67 (2025-12-11T03:00Z)
2025-12-10T21:58:00-MPC-001


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