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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: Earth
Event Time: 2025-05-28T22:38Z ( ACE: SWEPAM )

All Detecting Spacecrafts:

ACE: SWEPAM

ACE: MAG

DSCOVR: PLASMAG

Activity ID: 2025-05-28T22:38:00-IPS-001 (version 1)
Quality of ICME Signature: 2 (clear signatures)
Note: Characterized by a brief initial spike in Btotal from 16nT to 18.7nT, rising to a maximum Bt of 25.3nT with Bz southward at -24.8nT observed together at 2025-05-29T00:07Z. Observed alongside the start of a density pileup to a maximum of ~17.9 p/cc near 2025-05-28T23:44Z, rapidly increasing wind speed from ~370 km/s to ~630 km/s over the period 2025-05-28T23:11Z to 2025-05-29T02:07Z, and rising temperature profile alongside the wind speed increase. Solar wind and temperature data remain high, likely indicative of a coronal hole high speed stream arrival.

Version 1 submitted on 2025-05-29T02:17Z by Tony Iampietro

A Notification with ID 20250529-AL-001 was sent on 2025-05-29T02:25Z

All directly linked activities:

2025-05-28T23:11:00-HSS-001

2025-05-29T00:00:00-GST-001
NOAA Kp: 6.67 (2025-05-29T03:00Z)
NOAA Kp: 5.67 (2025-05-29T15:00Z)
NOAA Kp: 5.67 (2025-05-29T18:00Z)
NOAA Kp: 5.67 (2025-05-29T21:00Z)

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