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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG Location: Earth Event Time: 2023-07-21T19:25Z ( DSCOVR: PLASMAG ) Quality of ICME Signature: 2 (clear signatures) Note: From Tarik Mohammad, LASSOS team: a well-defined shock (increase in magnetic field strength, proton density, and bulk speed). It is difficult to determine the jump in temperature due to scaling. There is a possible sheath region following the shock (enhancements in all the parameters are visible). The possible ICME ejecta start is around 2023-07-21T22:20Z. Around this time we see rotations in both B_y (positive to negative) and B_z (negative to positive). This also corresponds to a sharp decrease in proton density and also decrease in bulk speed and temperature. This is a possible flank CME encounter since the components (specially B_x and B_y remain constant). The end of the ICME ejecta is difficult to determine as we have a trailing high-speed stream. The possible end is around 2023-07-22T06:00Z. Submitted on 2023-08-01T17:29Z by Anna Chulaki A Notification with ID 20230721-AL-001 was sent on 2023-07-21T21:35Z |
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