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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG
Location: STEREO A
Event Time: 2024-12-18T06:15Z ( STEREO A: IMPACT )
All Detecting Spacecrafts:
STEREO A: IMPACT
STEREO A: PLASTIC
Activity ID: 2024-12-18T06:15:00-IPS-001 (version 2)
Quality of ICME Signature: 2 (clear signatures)
Note: Characterized by a shock increase in Btotal from 3.7nT->11nT, slowly reaching a peak Btotal of 24.7nT at 2024-12-18T11:29Z. Bz was initially mostly northward, diving southward at 2024-12-18T09:38Z and sustaining around -17nT to -20nT before rotating northward again. This shock was accompanied by a clear jump in density and a smaller jump in speed. No temperature data is available in real-time. Starting around 2024-12-18T16:30Z, there was an second gradual steady increase in B-total from approx. 7nT to a sustained value of 20nT seen after a data gap which lasted from about 2024-12-18T19:30Z to 2024-12-19T01:00Z, accompanied by a continuation of low density, a very slight increase in speed, and smooth rotation in the B-field components, indicating the likely presence of a flux rope. B-total gradually decreased back to 10nT by 2024-12-20T04:00Z. This arrival signature is suspected to be the combined arrival of CME 2024-12-15T01:25Z and CME 2024-12-15T04:23Z with possible additional influence from a coronal hole high speed stream.

Submitted on 2024-12-20T17:46Z by Hannah Hermann

No Notification has been sent for this activity yet.

All directly linked activities:
2024-12-15T01:25:00-CME-001
2024-12-15T04:23:00-CME-001
2024-12-18T12:01:00-SEP-001
STEREO A: IMPACT 13-100 MeV


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