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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG Location: Earth Event Time: 2025-03-21T01:42Z ( DSCOVR: PLASMAG ) Quality of ICME Signature: 2 (clear signatures) Note: Initial interplanetary shock seen at DSCOVR and ACE at 2025-03-21T01:42Z (ACE magnetic field data gap from 2025-03-21T04:00Z to 2025-03-21T09:48Z) characterized by rapid magnetic field rise from 3 to 6 nT, rapid increase in solar wind velocity from 380 km/s to 430 km/s, and simultaneous rises in solar wind density and temperature. A second magnetic field jump >10nT is observed at 2025-03-21T10:10Z, from around 9nT to 12nT with Bz initially mostly northward. In other solar wind components, a small but distinct speed jump from 370 km/s to 390 km/s, brief density spike from 15 p/cc to 22.9 p/cc, returning to 10 p/cc, and a minimal spike in temperature are observed with this second Bt spike. This arrival is likely attributed to CME 2025-03-17T11:36Z. Submitted on 2025-03-26T15:49Z by Mary Aronne A Notification with ID 20250321-AL-001 was sent on 2025-03-21T11:58Z |
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