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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: Earth
Event Time: 2024-12-17T04:40Z ( ACE: MAG )
All Detecting Spacecrafts:
ACE: MAG
ACE: SWEPAM
DSCOVR: PLASMAG
Activity ID: 2024-12-17T04:40:00-IPS-001 (version 3)
Quality of ICME Signature: 2 (clear signatures)
Note: Arrival characterized by an increase in B_total from approx. 6nT to 20nT, reaching a peak of approx. 31nT at 2024-12-17T08:39Z. Accompanied by an increase in solar wind speed from 390 km/s to sustained peak speeds of approx. 670 km/s, an increase in density, and an increase in temperature. The temperature decreased around 2024-12-17T09:45Z. There was a possible additional but weak arrival at approximately 2024-12-17T18:40Z, characterized by another increase in B-total from 11nT back up to a sustained 14nT, accompanied by another increase in temperature, decrease in density, and increase of solar wind speed from ~510 km/s to above 600 km/s, along with a period of predominantly negative Bz which reached a lowest negative value of -9nT at 2024-12-17T23:16Z. The arrival signature starting at 2024-12-17T04:40Z is suspected to be the combined arrival of CME 2024-12-15T01:25Z and CME 2024-12-15T04:23Z, along with additional influence from a coronal hole high speed stream.

Submitted on 2024-12-20T17:29Z by Hannah Hermann

A Notification with ID 20241217-AL-002 was sent on 2024-12-17T12:14Z

All directly linked activities:
2024-12-15T01:25:00-CME-001
2024-12-15T04:23:00-CME-001
2024-12-17T06:10:00-MPC-001


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