# Tohban Notes on 2020-09-20 - 2020-09-29 Geomagnetic activity overview 2020-09-25 - 2020-09-26: Provisional Dst decresed to -74 nT between 2100 UT on 09/25 and 0500 UT on 09/26 2020-09-27 - 2020-09-29: High-speed solar wind stream, Provisional Dst decresed to -80 nT between 2000 UT on 09/27 and 0300 UT on 09/28 and stays on a level of -60 - -50 to 0500 UT 0n 09/29 2020-09-23/12:00 - 13:00 UT: Substorm with AE max ~ 1500 nT, AL min -1000 nT 2020-09-23/19:00 - 21:00 UT: Substorm with AE max ~ 1000 nT, AL min -800 nT 2020-09-24/07:00 - 10:00 UT: Substorm with quasi-periodic AE/AL activations with AE max ~ 1200 nT, AL min -1000 nT 2020-09-24/13:00 - 16:00 UT: Substorm with quasi-periodic AE/AL activations with AE max ~ 1100 nT, AL min -1000 nT 2020-09-25/08:00 - 09:00 UT: Substorm with AE max ~ 600 nT, AL min -500 nT 2020-09-25/09:30 - 11:00 UT: Substorm with with quasi-periodic AE/AL activations with AE max ~ 900 nT, AL min -800 nT 2020-09-25/15:00 - 17:00 UT: Substorm with with quasi-periodic AE/AL activations with AE max ~ 1500 nT, AL min -1300 nT 2020-09-25/20:00 - 24:00 UT: Storm-time AE/AL recurrent activations with AE max 1000 to 1500 nT, AL min <-1000 nT 2020-09-26/00:00 - 08:00 UT: Storm-time AE/AL activations continue, AE max ~ 800 to 1000 nT 2020-09-26/10:00 - 11:00 UT: Substorm with AE max ~ 1500 nT, AL min <-1000 nT 2020-09-26/13:00 - 14:00 UT: Substorm with AE max ~ 1000 nT, AL min -800 nT 2020-09-27/03:00 - 04:00 UT: Substorm with AE max ~ 800 nT, AL min <-500 nT 2020-09-27/15:00 - 24:00 UT: Storm-time AE/AL recurrent activations with AE max 1000 to 1500 nT, AL min <-1000 nT 2020-09-28/00:00 - 08:00 UT: Storm-time AE/AL activations continue, AE max ~ 800 to 1100 nT 2020-09-28/11:00 - 24:00 UT: Storm-time AE/AL recurrent activations with AE max 1000 to 1500 nT, AL min <-1000 nT 2020-09-29/00:00 - 08:00 UT: Storm-time AE/AL recurrent activations, AE max ~ 1000 nT, AL min ~ -800 nT. ------------------------------------------------------------- Science notes on ELFIN data EL-A 2020-09-22/09:15 - 09:18 UT South Descending. Flux increase, precipitation at LAT ~-66, MLT ~ 1.7 2020-09-24/03:22 - 03:23 UT South Descending. Sharp precipitation at LAT ~ -67, MLT ~ 23 2020-09-24/14:09 - 14:12 UT South Descending. Flux increase, precipitation at LAT ~-57, MLT ~ 1.4 2020-09-25/04:18 - 04:20 UT South Descending. Precipitation bursts at LAT -70 - -75, MLT ~ 00 - 23 2020-09-25/05:51 - 05:53 UT South Descending. Sharp precipitation at LAT ~ -71, MLT ~ 0.4 2020-09-25/07:24 - 07:26 UT South Descending. Sharp precipitation at LAT ~ -70, MLT ~ 1.1 2020-09-25/10:28 - 10:22 UT South Descending. Precipitation bursts at LAT -60 - -75, MLT ~ 1.8 - 2.0 2020-09-25/12:01 - 12:02 UT South Descending. Precipitation bursts at LAT -65, MLT ~ 1.8 2020-09-25/18:12 - 18:14 UT South Descending. Precipitation bursts at LAT -65, MLT ~ 0.4 2020-09-25/18:12 - 18:14 UT South Descending. Precipitation bursts at LAT -65, MLT ~ 23.5 2020-09-25/21:22 - 21:24 UT South Descending. Precipitation bursts at LAT -65 - -70, MLT ~ 22.0 2020-09-26/00:30 - 00:32 UT South Descending. Sharp precipitation at LAT ~ -65, MLT ~ 23.0 2020-09-26/02:05 - 02:07 UT South Descending. Precipitation bursts at LAT -67 - -70, MLT ~ 23.0 - 22.0 2020-09-26/05:13 - 05:15 UT South Descending. Precipitation bursts at LAT -69 - -70, MLT ~ 0.0 2020-09-26/08:18 - 08:21 UT South Descending. Precipitation bursts at LAT -67 - -69, MLT ~ 1.4 2020-09-27/03:02 - 03:04 UT South Descending. Precipitation bursts at energies up to MeV at LAT -66 - -73, MLT ~ 23.4 - 22.7 2020-09-28/07:03 - 07:07 UT South Descending. Flux increase, broad precipitation at LAT 63 - 72, MLT ~ 1.0 EL-B 2020-09-24/11:36 - 11:37 UT North Descending. Sharp precipitation at LAT ~ 67.5, MLT ~ 23.9 2020-09-24/13:08 - 13:11 UT North Descending. Broad precipitation at LAT ~ 65, MLT ~ 0.0 2020-09-24/06:20 - 06:21 UT North Descending. Sharp precipitation at LAT ~ 65, MLT ~ 1.1 2020-09-25/10:58 - 11:00 UT North Descending. Precipitation bursts at LAT - 65, MLT ~ 0.0 2020-09-25/17:11 - 17:13 UT North Descending. Precipitation bursts at LAT - 62, MLT ~ 1.1 2020-09-25/18:45 - 18:46 UT North Descending. Precipitation bursts at LAT - 60, MLT ~ 1.8 2020-09-26/01:00 - 01:03 UT North Descending. Precipitation bursts up to ~500 keV - 1MeV at LAT - 65, MLT ~ 2.5 2020-09-26/05:43 - 05:46 UT North Descending. Precipitation bursts up to ~500 keV - 1MeV at LAT - 65, MLT ~ 1.2 2020-09-26/07:17 - 07:20 UT North Descending. Broad precipitation up to ~1MeV at LAT - 62, MLT ~ 0.7 2020-09-26/10:21 - 10:24 UT North Descending. Broad precipitation up to ~1MeV, increased flux of reflected electrons at LAT - 67 to 60, MLT ~ 23.9 to 0.2 2020-09-26/10:21 - 10:24 UT North Descending. Broad precipitation, precipitation bursts up to ~1MeV, increased flux of reflected electrons at LAT - 70 to 56, MLT ~ 23.7 to 0.3 (data is not regularized yet) 2020-09-26/16:34 - 16:35 UT North Descending. Sharp precipitation at LAT ~ 60, MLT ~ 0.9 2020-09-26/22:48 - 22:50 UT North Descending. Precipitaion bursts at LAT ~ 65, L ~ 2.5 (data is not regularized) ------------------------------------------------------------- Data collection (current status) EL-A 2020-09-20 6 SZ, South Descending 2020-09-21 6 SZ, South Descending 2020-09-22 7 SZ, South Descending 2020-09-23 No science quality data (test?) 2020-09-24 5 SZ, South Descending 2020-09-25 11 SZ, South Descending 2020-09-26 13 SZ, South Descending 2020-09-27 7 SZ, South Descending 2020-09-28 7 SZ, South Descending Comments 2020-09-20/04:18 - 04:21 UT South Descending, Data gaps 2020-09-20/05:51 - 05:54 UT South Descending, Data gaps 2020-09-20/08:58 - 09:01 UT South Descending, Intermittent data gaps 2020-09-20/22:56 - 23:00 UT South Descending, Data gaps 2020-09-21/02:06 - 02:08 UT South Descending, Data gaps 2020-09-21/03:40 - 03:43 UT South Descending, Intermittent data gaps 2020-09-21/06:47 - 06:50 UT South Descending, Data gaps 2020-09-21/11:25 - 11:29 UT South Descending, Data gaps 2020-09-21/23:52 - 23:56 UT South Descending, Data gaps 2020-09-22/21:41 - 21:43 UT South Descending, Data gaps 2020-09-24/14:09 - 14:10 UT South Descending, Data gaps 2020-09-24/21:57 - 21:59 UT South Descending, Data gaps 2020-09-25/04:15 - 04:18 UT South Descending, Data gaps 2020-09-25/05:48 - 05:51 UT South Descending, Data gaps 2020-09-25/07:22 - 07:24 UT South Descending, Data gaps 2020-09-25/08:56 - 08:58 UT South Descending, Data gaps 2020-09-25/10:27 - 10:28 UT South Descending, Data gaps 2020-09-25/18:11 - 18:12 UT South Descending, Data gaps 2020-09-25/22:54 - 22:59 UT South Descending, Intermittent data gaps 2020-09-26/02:04 - 02:06 UT South Descending, Data gaps 2020-09-26/03:38 - 03:40 UT South Descending, Data gaps 2020-09-26/05:12 - 05:14 UT South Descending, Data gaps 2020-09-26/11:24 - 11:26 UT South Descending, Data gaps 2020-09-26/14:27 - 14:28 UT South Descending, Data gaps 2020-09-26/22:16 - 22:22 UT South Descending, Intermittent data gaps 2020-09-27/04:34 - 04:36 UT South Descending, Data gaps 2020-09-27/09:12 - 09:14 UT South Descending, Data gaps 2020-09-27/12:17 - 12:22 UT South Descending, Data gaps 2020-09-28/00:47 - 00:52 UT South Descending, Data gaps 2020-09-28/05:29 - 05:34 UT South Descending, Data gaps 2020-09-28/07:02 - 07:06 UT South Descending, Data gaps 2020-09-28/10:08 - 10:13 UT South Descending, Intermittent data gaps 2020-09-28/22:34 - 22:38 UT South Descending, Intermittent data gaps EL-B 2020-09-22 11 SZ, North Descending 2020-09-23 5 SZ, North Descending 2020-09-24 6 SZ, North Descending 2020-09-25 5 SZ, North Descending 2020-09-26 5 SZ, North Descending Comments 2020-09-22/12:50 - 12:53 UT, North Descending, Intermittent data gaps 2020-09-23/00:00 - 24:00 UT, North Descending, Intermittent data gaps, too fragmentray data 2020-09-24/02:14 - 02:18 UT, North Descending, Data gaps 2020-09-24/06:58 - 07:00 UT, North Descending, Intermittent data gaps 2020-09-24/19:22 - 19:24 UT, North Descending, Data gaps 2020-09-26/19:54 - 20:02 UT, North Descending, Too fragmental data, not regularized