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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG Location: Earth Event Time: 2021-03-24T19:18Z ( DSCOVR: PLASMAG ) Quality of ICME Signature: 0 (weak signatures) Note: There was a weaker signature prior to this at 2021-03-24T04:57Z that was originally attributed to this IPS. However, it was discussed with experts and it was decided the second signature was more indicative of a CME arrival due to the temperature decrease. Magnetic field amplitude does not reach the threshold 10nT in either signature. In the first signature the B_total has a sudden increase from 1.82nT at 04:47Z to 4.6nT at 05:02Z compared to the second, more prominent signature having a sudden increase in B_total from 3.48nT at 19:11Z to 7.74nT at 19:22Z. There is a small amount of x-z field rotation beginning immediately after the weaker signature at 2021-03-24T04:57Z as well as the more prominent signature at 2021-03-24T19:18Z. There is also a pile-up (compression) ahead of both signatures prior to the B_total increases. Solar wind speed has a brief increase at the time of the weaker signature, but begins ramping up at the time of the more notable signature. Density drops and temperature increases momentarily during the first signature at 2021-03-24T04:58Z but stays elevated. The second signature has an increase of temperature at the beginning but then it decreases indicating the flux rope structure. Submitted on 2021-03-25T20:12Z by Yaireska Collado No Notification has been sent for this activity yet. |
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