Table 2.
Timeline of the 2020 November 29 SEP event.
| Date | Estimated solar release | Delay w.r.t. | Observed onset | Observation | Instrument | Mission |
|---|---|---|---|---|---|---|
| time (UT) | Type III(1) (min) | time (UT) | ||||
| 29/11 | 12:26 | −19 | 12:34 | M4.4 X-ray flare onset | GOES | GOES |
| 29/11 | 12:37 | −8 | 12:45 | Hard X-ray onset | EPHIN | SOHO |
| 29/11 | 12:43 | −1 | 12:51 | dm-m-λ type II | ORFEES | Earth |
| 29/11 | 12:45 | 0 | 12:53 | DH type III(1) | WAVES | STA |
| 29/11 | 12:58 | +13 | 13:06 | DH type II | WAVES | STA |
| 29/11 | 12:58 | +13 | 13:06 | DH type III(2) | WAVES | STA |
| 29/11 | 13:03 | +18 | 13:11 | M4.4 X-ray flare max | GOES | GOES |
| 29/11 | 13:17 | +32 | 13:25 | CME | COR2 | STA |
| 29/11 | 13:19 ± 5 min TSA | +34 | 13:28 ± 5 min (c) | > 0.5 MeV e- onset | EPI-Hi | PSP |
| 29/11 | 13:22 ± 4 min VDA | +37 | 13:39 ± 1 min | 165 − 335 keV e- onset | SEPT | STA |
| 29/11 | 13:17 ± 11 min TSA (a)(b) | +32 | 13:40 ± 11 min | 168 − 334 keV e- onset | EPT | SolO |
| 29/11 | 15:24 ± 19 min TSA (a) | +159 | 15:36 ± 19 min | 250 − 700 keV e- onset | EPHIN | SOHO |
| 29/11 | 13:15 VDA (c) | +30 | 14:30 ± 5 min (c) | 8.0 − 16.0 MeV p onset | EPI-Hi | PSP |
| 29/11 | 13:53 ± 5 min TSA (a) | +68 | 14:35 ± 5 min | 13.7 − 21.2 MeV p onset | HET | SolO |
| 29/11 | 14:47 ± 10 min TSA (a) | +122 | 15:40 ± 10 min | 13.6 − 19.3 MeV p onset | HET | STA |
| 29/11 | 18:54 ± 5 min TSA (a) | +369 | 19:50 ± 5 min | 13.0 − 20.0 MeV p onset | ERNE | SOHO |
Notes.
Assuming the path length from ENLIL simulations listed in Table 1.
The onset of 165 − 334 keV electrons observed by EPT is likely too late due to a low signal-to-background ratio. Here we are using the earliest onset time of relativistic electrons (2.4 − 6.0 MeV) observed by HET at 13:25 UT for the TSA.
Values for PSP were taken from Cohen et al. (2021).
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