Tohban Report 04/11/21 - 04/17/21 Tohban Name: Xiaojia Zhang (updated [04/19/2021]) Special Notes ------------- Series of intense substorms start from ~16UT 04/16/2021, continuing to 04/17/2021 Automatic report generated 2021-04-19 19:01:44.609594 (UTC) Note: data is provisional, and may be subject to change Geomagnetic Activity Overview ----------------------------- Day Hour AE (max) AE (sd) DST (min) KP (max) Notes ------------------------------------------------------ 11 0 189 32 0 2.0 ... 11 3 298 54 -5 2.0 A weak substorm 11 6 528 103 -3 1.3 A major substorm 11 9 212 43 -2 0.7 ... 11 12 75 16 -2 0.7 ... 11 15 274 56 7 0.3 A weak substorm 11 18 309 34 2 2.0 ... 11 21 262 52 -4 1.7 ... 12 0 75 11 10 1.0 ... 12 3 132 24 8 0.3 ... 12 6 245 48 0 1.0 A weak substorm 12 9 319 63 1 1.7 ... 12 12 245 39 -2 0.7 ... 12 15 657 192 4 2.0 A major substorm 12 18 302 72 6 1.0 ... 12 21 75 11 7 0.7 ... 13 0 57 8 10 0.0 ... 13 3 261 62 8 1.0 ... 13 6 283 33 2 0.7 A weak substorm 13 9 625 156 -6 1.3 A major substorm 13 12 358 63 -2 1.7 ... 13 15 221 31 8 1.3 ... 13 18 170 30 9 1.3 ... 13 21 113 17 5 1.7 ... 14 0 57 5 4 1.0 ... 14 3 71 11 11 1.3 ... 14 6 75 18 10 0.0 ... 14 9 224 42 4 1.7 ... 14 12 206 29 4 0.7 ... 14 15 132 25 14 1.7 ... 14 18 94 18 19 1.7 ... 14 21 604 181 10 3.3 A major substorm 15 0 374 91 13 2.7 ... 15 3 552 132 9 3.3 A weak substorm 15 6 988 286 -9 4.7 A major substorm 15 9 132 20 3 1.3 ... 15 12 94 14 5 2.3 ... 15 15 188 35 8 1.7 ... 15 18 57 8 5 0.7 ... 15 21 75 8 0 1.7 ... 16 0 300 54 15 2.0 ... 16 3 507 150 4 2.3 A major substorm 16 6 662 94 -9 2.7 ... 16 9 385 90 -4 2.3 ... 16 12 904 190 -13 3.0 A major substorm 16 15 728 187 -5 2.7 ... 16 18 1713 399 -46 4.7 !A major substorm 16 21 906 131 -42 4.3 ... 17 0 1125 238 -38 4.7 !Elevated AE level throughout the day, with several major substorms 17 3 1038 148 -49 4.7 ... 17 6 1318 308 -44 5.0 ... 17 9 1093 231 -37 3.7 ... 17 12 1162 300 -23 4.3 ... 17 15 1122 170 -26 3.7 ... 17 18 711 125 -26 3.0 ... 17 21 962 271 -25 3.7 ... ELFIN Data Collection and Notes ------------------------------- Flags: * = Extremely Interesting # = Potentially Interesting G = Too many gaps, need more data to judge B = Bad data [indicates something wrong with instruments, not availability status] T = Test data [indicates data is no good for science, elaborate on test conditions in notes] Zones: NA: North Ascending ND: North Descending SD: South Descending SA: South Ascending ELFIN A Outer EPD ----------------- Science Zone Range Zone Completeness Notes DL Completeness Flag Science Notes --------------------------------------------------------------------------------------------------------------- 2021-04-11 00:43:13 - 00:49:14 SA 6 small gaps, mainly in end 73/128 = 57% G ... 2021-04-11 03:01:45 - 03:07:44 ND 1 large gap, mainly in end 114/128 = 89% # Regularly-populated two belts and plasma sheet 2021-04-11 03:53:35 - 03:59:50 SA Cut short 3/133 = 2% G Inner belt observations, see below 2021-04-11 04:33:53 - 04:40:02 ND 3 small gaps, mainly in end 118/131 = 90% # Regularly-populated two belts and plasma sheet 2021-04-11 06:06:23 - 06:12:32 ND 1 small gap, mainly in beginning 130/131 = 99% # Regularly-populated two belts and plasma sheet 2021-04-11 09:12:11 - 09:18:17 ND No significant gaps 131/130 = 101% # Regularly-populated outer belt and plasma sheet 2021-04-11 14:38:24 - 14:44:43 SA 4 small gaps, mainly in beginning 152/135 = 113% # Regularly-populated outer belt and plasma sheet 2021-04-11 15:32:34 - 15:38:50 ND Cut short 3/133 = 2% G Inner belt observations, see below 2021-04-11 16:59:51 - 17:05:58 ND 1 small gap, mainly in beginning 130/130 = 100% # Low flux throughout, barely any in the plasma sheet 2021-04-11 18:34:38 - 18:40:49 ND 9 small gaps, mainly in beginning 140/132 = 106% # Low flux throughout the science zone 2021-04-11 21:43:23 - 21:49:30 ND 1 small gap, mainly in beginning 130/130 = 100% # Regularly-populated outer belt and plasma sheet 2021-04-11 23:16:31 - 23:22:52 ND 2 small gaps, mainly in end 125/136 = 92% # Regularly-populated two belts and plasma sheet 2021-04-12 01:35:32 - 01:41:43 SA 3 small gaps, mainly in middle 108/132 = 82% # Regularly-populated outer belt and plasma sheet 2021-04-12 02:21:57 - 02:27:58 ND 2 large gaps, mainly in beginning/middle 99/128 = 77% # Regularly-populated two belts and plasma sheet 2021-04-12 03:07:59 - 03:14:01 SA 2 large gaps, mainly in end 113/129 = 88% # Regularly-populated outer belt and plasma sheet 2021-04-12 03:54:02 - 04:00:12 ND 1 large gap, mainly in middle 121/131 = 92% # Regularly-populated two belts and plasma sheet 2021-04-12 05:26:29 - 05:32:36 ND 1 small gap, mainly in beginning 130/130 = 100% # Regularly-populated two belts and plasma sheet 2021-04-12 10:04:52 - 10:11:09 ND 2 small gaps, mainly in end 125/134 = 93% # Regularly-populated outer belt and plasma sheet 2021-04-12 11:38:22 - 11:44:20 ND No significant gaps 127/127 = 100% # Regularly-populated outer belt and plasma sheet 2021-04-12 13:17:53 - 13:24:11 ND Cut short 4/134 = 3% G Inner belt observations, see below 2021-04-12 14:45:02 - 14:51:10 ND No significant gaps 131/131 = 100% # Low flux throughout the science zone 2021-04-12 16:18:57 - 16:25:13 ND 1 small gap, mainly in beginning 130/134 = 97% # Barely any flux throughout the science zone 2021-04-12 17:53:46 - 17:59:59 ND 1 small gap, mainly in beginning 131/133 = 98% # Low flux in the outer belt 2021-04-12 23:28:41 - 23:34:59 SA Cut short 4/134 = 3% G Inner belt observations, see below 2021-04-13 03:14:25 - 03:20:27 ND 2 large gaps, mainly in end 31/128 = 24% G ... 2021-04-13 04:00:25 - 04:06:28 SA 5 large gaps, mainly in end 56/128 = 44% G ... 2021-04-13 05:32:59 - 05:38:55 SA 3 large gaps, mainly in middle/end 29/126 = 23% G ... 2021-04-13 06:19:19 - 06:25:16 ND 5 large gaps, mainly in middle 60/126 = 48% G ... 2021-04-13 07:05:19 - 07:11:36 SA 3 large gaps, mainly in beginning 40/133 = 30% G ... 2021-04-13 09:25:05 - 09:31:01 ND 3 large gaps, mainly in middle 55/126 = 44% G ... 2021-04-13 10:58:12 - 11:04:11 ND 3 large gaps, mainly in end 80/127 = 63% G ... 2021-04-13 12:37:30 - 12:43:45 ND Cut short 3/133 = 2% G Inner belt observations, see below 2021-04-13 15:38:29 - 15:44:33 ND 3 large gaps, mainly in beginning 85/129 = 66% # Seems regularly-populated outer belt and plasma sheet 2021-04-13 17:13:07 - 17:19:03 ND 2 large gaps, mainly in middle 83/126 = 66% # Low flux throughout the science zone 2021-04-13 21:56:19 - 22:02:26 ND 3 large gaps, mainly in beginning 92/130 = 71% # Seems regularly-populated outer belt and plasma sheet 2021-04-13 22:48:36 - 22:54:52 SA Cut short 3/133 = 2% G Inner belt observations, see below 2021-04-14 02:34:37 - 02:40:33 ND 2 large gaps, mainly in middle/end 23/126 = 18% G ... 2021-04-14 04:06:49 - 04:12:49 ND 3 large gaps, mainly in beginning 30/127 = 24% G ... 2021-04-14 05:39:21 - 05:45:17 ND 4 large gaps, mainly in middle/end 18/126 = 14% G ... 2021-04-14 09:31:16 - 09:37:24 SA 2 small gaps, mainly in beginning 11/130 = 8% G ... 2021-04-15 01:08:18 - 01:14:42 SA 3 small gaps, mainly in beginning 124/136 = 91% # Regularly-populated two belts and plasma sheet 2021-04-15 02:46:37 - 02:52:53 SA Cut short 4/133 = 3% G Inner belt observations, see below 2021-04-15 03:26:44 - 03:33:07 ND 2 large gaps, mainly in middle/end 89/136 = 65% # Seems regularly-populated two belts and plasma sheet 2021-04-15 04:59:14 - 05:05:26 ND 2 large gaps, mainly in middle 92/132 = 70% # Seems regularly-populated two belts and plasma sheet 2021-04-15 06:31:57 - 06:38:06 ND 1 large gap, mainly in middle/end 114/131 = 87% # Regularly-populated two belts and plasma sheet 2021-04-15 10:24:14 - 10:30:22 SA 3 large gaps, mainly in beginning 62/130 = 48% G ... 2021-04-15 11:57:38 - 12:03:40 SA 10 small gaps, mainly in beginning 123/128 = 96% # Regularly-populated two belts and plasma sheet 2021-04-15 13:30:35 - 13:36:59 SA 1 small gap, mainly in beginning 131/136 = 96% # Regularly-populated two belts and highly energized plasma sheet 2021-04-15 14:24:23 - 14:30:41 ND Cut short 4/133 = 3% G Inner belt observations, see below 2021-04-15 15:51:32 - 15:57:43 ND 3 small gaps, mainly in end 119/131 = 91% # Regularly-populated outer belt and plasma sheet 2021-04-15 17:26:05 - 17:32:14 ND 3 small gaps, mainly in end 124/131 = 95% # Low flux throughout the science zone 2021-04-15 23:42:18 - 23:48:28 ND 1 large gap, mainly in end 118/131 = 90% # Regularly-populated two belts and plasma sheet 2021-04-16 00:34:14 - 00:40:32 SA Cut short 4/133 = 3% G Inner belt observations, see below 2021-04-16 02:46:56 - 02:53:17 ND 10 small gaps, mainly in end 135/134 = 101% # Regularly-populated two belts and plasma sheet 2021-04-16 04:19:12 - 04:25:39 ND 4 small gaps, mainly in end 158/136 = 116% # Regularly-populated two belts and plasma sheet 2021-04-16 05:51:56 - 05:58:03 ND 1 large gap, mainly in end 119/129 = 92% # Regularly-populated two belts and plasma sheet 2021-04-16 08:57:41 - 09:03:52 ND 1 small gap, mainly in beginning 129/131 = 98% # Regularly-populated outer belt and plasma sheet 2021-04-16 10:30:30 - 10:36:49 ND 1 large gap, mainly in end 119/134 = 89% # Regularly-populated outer belt and plasma sheet 2021-04-16 13:43:50 - 13:50:08 ND Cut short 4/133 = 3% G Inner belt observations, see below 2021-04-16 14:24:03 - 14:30:11 SA No significant gaps 130/130 = 100% ! Persistent bursts of electron precipitation at <~300keV 2021-04-16 15:57:53 - 16:04:06 SA 1 small gap, mainly in beginning 129/131 = 98% ! Persistent bursts of electron precipitation at <~300keV 2021-04-16 17:32:42 - 17:38:50 SA No significant gaps 130/130 = 100% # Regularly-populated outer belt and plasma sheet 2021-04-16 20:41:45 - 20:47:54 SA 1 small gap, mainly in beginning 128/130 = 98% # Regularly-populated outer belt and plasma sheet 2021-04-16 23:02:02 - 23:08:25 ND 2 small gaps, mainly in beginning 129/135 = 96% # Regularly-populated outer belt and plasma sheet 2021-04-17 01:21:18 - 01:27:19 SA 3 large gaps, mainly in end 61/127 = 48% G ... 2021-04-17 03:39:25 - 03:45:40 ND 4 large gaps, mainly in end 59/131 = 45% G ... 2021-04-17 04:31:39 - 04:37:51 SA Cut short 2/130 = 2% G Inner belt observations, see below 2021-04-17 05:12:02 - 05:18:05 ND 7 small gaps, mainly in middle 80/127 = 63% # Seems regularly-populated outer belt and plasma sheet 2021-04-17 09:50:42 - 09:56:38 ND 8 small gaps, mainly in end 58/125 = 46% G ... 2021-04-17 11:23:51 - 11:29:51 ND 3 small gaps, mainly in beginning/middle 106/126 = 84% # Regularly-populated outer belt and plasma sheet 2021-04-17 14:30:25 - 14:36:39 ND 3 large gaps, mainly in beginning 82/131 = 63% # Two intense bursts of precipitation at <1MeV 2021-04-17 16:11:39 - 16:17:56 ND Cut short 3/132 = 2% G Inner belt observations, see below 2021-04-17 16:51:55 - 16:57:55 SA No significant gaps 123/126 = 98% ! Persistent bursts of electron precipitation at <~700keV 2021-04-17 18:26:27 - 18:32:44 SA 2 small gaps, mainly in middle 123/132 = 93% ! Persistent bursts of electron precipitation at <~700keV 2021-04-17 20:01:14 - 20:07:18 SA 1 large gap, mainly in middle/end 109/127 = 86% # Regularly-populated outer belt and plasma sheet 2021-04-17 23:08:19 - 23:14:45 SA 3 small gaps, mainly in beginning 123/135 = 91% ! Intense electron precipitation at <~700keV ELFIN B Outer EPD ----------------- Science Zone Range Zone Completeness Notes DL Completeness Flag Science Notes ---------------------------------------------------------------------------------------------------------- 2021-04-11 03:31:56 - 03:37:52 ND 3 large gaps, mainly in middle 7/128 = 5% G ... 2021-04-11 05:04:19 - 05:10:15 ND 3 large gaps, mainly in middle/end 6/128 = 5% G ... 2021-04-11 06:36:57 - 06:42:53 ND 6 large gaps, mainly in end 25/128 = 20% G ... 2021-04-11 07:23:21 - 07:29:20 SA 5 large gaps, mainly in end 29/129 = 22% G ... 2021-04-11 11:16:00 - 11:21:56 ND 3 large gaps, mainly in middle 38/128 = 30% G ... 2021-04-12 00:33:55 - 00:39:51 SA 1 large gap, mainly in middle/end 6/127 = 5% G ... 2021-04-12 02:06:20 - 02:12:16 SA 7 large gaps, mainly in beginning 14/127 = 11% G ... 2021-04-12 03:38:37 - 03:44:33 SA 5 large gaps, mainly in end 25/127 = 20% G ... 2021-04-12 05:57:20 - 06:03:16 ND Cut short 1/127 = 1% G ... 2021-04-12 10:36:11 - 10:42:12 ND 4 large gaps, mainly in end 50/129 = 39% G ... 2021-04-12 12:56:03 - 13:01:59 SA 6 large gaps, mainly in middle 53/127 = 42% G ... 2021-04-12 15:16:29 - 15:22:28 ND 4 small gaps, mainly in middle 88/128 = 69% # Low flux throughout the science zone 2021-04-12 16:50:50 - 16:56:46 ND 1 large gap, mainly in middle 2/127 = 2% G ... 2021-04-12 18:25:41 - 18:31:42 ND 1 small gap, mainly in beginning 122/129 = 95% # Low flux throughout the science zone 2021-04-12 20:47:28 - 20:53:29 SA 1 large gap, mainly in end 113/129 = 88% # Regularly-populated outer belt and plasma sheet 2021-04-12 23:07:51 - 23:13:47 ND 3 large gaps, mainly in end 22/127 = 17% G ... 2021-04-12 23:59:59 - 00:05:55* SA 4 large gaps, mainly in end 20/127 = 16% G Did not see this pass in the online summary plot 2021-04-13 03:45:20 - 03:51:16 ND 6 large gaps, mainly in end 38/127 = 30% G ... 2021-04-13 04:31:30 - 04:37:26 SA 7 large gaps, mainly in end 25/127 = 20% G ... 2021-04-13 06:04:03 - 06:10:06 SA 2 large gaps, mainly in middle 41/130 = 32% G ... 2021-04-13 07:36:51 - 07:42:47 SA 3 large gaps, mainly in middle 55/127 = 43% # Regularly-populated two belts and plasma sheet 2021-04-13 09:56:24 - 10:02:26 ND 6 large gaps, mainly in end 67/129 = 52% G ... 2021-04-13 11:29:34 - 11:35:30 ND 7 large gaps, mainly in end 47/127 = 37% G ... 2021-04-13 14:36:24 - 14:42:23 ND 2 large gaps, mainly in end 92/128 = 72% # Regularly-populated outer belt and plasma sheet 2021-04-13 17:45:12 - 17:51:14 ND No significant gaps 128/129 = 99% # Low flux throughout the science zone 2021-04-13 23:14:36 - 23:20:37 SA No significant gaps 128/129 = 99% # Regularly-populated two belts and plasma sheet 2021-04-15 02:26:31 - 02:32:27 ND Cut short 1/127 = 1% G ... 2021-04-15 07:50:26 - 07:56:22 SA 2 large gaps, mainly in middle/end 6/127 = 5% G ... 2021-04-15 10:56:35 - 11:02:31 SA 5 large gaps, mainly in end 25/127 = 20% G ... 2021-04-15 12:29:50 - 12:35:46 SA 4 large gaps, mainly in middle 19/127 = 15% G ... 2021-04-15 14:03:16 - 14:09:12 SA 3 small gaps, mainly in beginning 21/127 = 17% G ... 2021-04-16 03:19:20 - 03:25:22 ND 1 large gap, mainly in end 116/129 = 90% # Regularly-populated two belts and plasma sheet 2021-04-16 04:51:43 - 04:57:43 ND 1 large gap, mainly in middle 115/128 = 90% # Regularly-populated two belts and plasma sheet 2021-04-16 06:24:21 - 06:30:22 ND No significant gaps 127/128 = 99% # Regularly-populated two belts and plasma sheet 2021-04-16 08:43:40 - 08:49:36 SA 2 large gaps, mainly in end 101/127 = 80% # Regularly-populated two belts and plasma sheet 2021-04-16 11:03:23 - 11:09:23 ND 1 large gap, mainly in beginning 121/128 = 95% # Regularly-populated outer belt and plasma sheet 2021-04-16 13:23:19 - 13:29:20 SA No significant gaps 128/129 = 99% ! Persistent bursts of electron precipitation at <~300keV 2021-04-16 14:56:58 - 15:03:01 SA 1 large gap, mainly in beginning 120/129 = 93% ! Persistent bursts of electron precipitation at <~300keV 2021-04-16 16:31:14 - 16:37:18 SA 1 large gap, mainly in beginning 112/130 = 86% # Regularly-populated outer belt and plasma sheet 2021-04-16 17:18:40 - 17:24:42 ND 3 small gaps, mainly in middle 123/129 = 95% # Low flux throughout the science zone 2021-04-16 19:40:47 - 19:46:48 SA 1 small gap, mainly in end 122/128 = 95% ! Persistent bursts of electron precipitation at <~700keV 2021-04-16 22:01:48 - 22:07:51 ND 1 large gap, mainly in middle 110/129 = 85% # Regularly-populated outer belt and plasma sheet 2021-04-16 23:34:57 - 23:40:57 ND 1 small gap, mainly in end 124/128 = 97% # Regularly-populated outer belt and plasma sheet 2021-04-17 04:12:12 - 04:18:08 ND Cut short 1/126 = 1% G ... 2021-04-17 05:44:43 - 05:50:39 ND 4 large gaps, mainly in end 10/126 = 8% G ... 2021-04-17 08:50:27 - 08:56:29 ND 4 large gaps, mainly in end 19/128 = 15% G ... 2021-04-17 11:10:07 - 11:16:08 SA 6 small gaps, mainly in beginning 101/128 = 79% # Regularly-populated two belts and plasma sheet 2021-04-17 14:16:53 - 14:22:53 SA 1 large gap, mainly in beginning 111/128 = 87% # Regularly-populated outer belt and plasma sheet 2021-04-17 15:03:50 - 15:09:52 ND 1 small gap, mainly in end 127/128 = 99% # Regularly-populated outer belt and plasma sheet 2021-04-17 17:25:33 - 17:31:35 SA No significant gaps 128/128 = 100% ! Persistent bursts of electron precipitation at <~700keV 2021-04-17 19:00:23 - 19:06:23 SA No significant gaps 127/128 = 99% ! Persistent bursts of electron precipitation at <~700keV 2021-04-17 20:34:48 - 20:40:44 SA 1 large gap, mainly in middle 106/126 = 84% # Regularly-populated outer belt and plasma sheet ELFIN A Inner EPD ----------------- Science Zone Range Zone Completeness Notes DL Completeness Flag Science Notes -------------------------------------------------------------------------------------------------------------- 2021-04-11 03:53:49 - 04:03:47 ISA No significant gaps 54/53 = 102% # ... 2021-04-11 15:32:42 - 15:42:41 IND No significant gaps 54/53 = 102% # ... 2021-04-12 13:18:05 - 13:28:16 IND 1 large gap, mainly in middle/end 46/54 = 85% # ... 2021-04-12 23:29:01 - 23:39:01 ISA No significant gaps 54/53 = 102% # ... 2021-04-13 12:37:44 - 12:47:46 IND 2 large gaps, mainly in middle/end 40/54 = 74% # ... 2021-04-13 22:48:48 - 22:58:53 ISA 1 small gap, mainly in beginning/middle 54/54 = 100% # ... 2021-04-14 13:31:08 - 13:41:06 IND 1 large gap, mainly in middle/end 44/53 = 83% # ... 2021-04-14 23:41:40 - 23:51:44 ISA 22 small gaps, mainly in end 38/54 = 70% # ... 2021-04-15 02:46:48 - 02:56:50 ISA No significant gaps 54/53 = 102% # ... 2021-04-15 14:24:35 - 14:34:38 IND No significant gaps 54/53 = 102% # ... 2021-04-16 00:34:25 - 00:44:29 ISA No significant gaps 54/53 = 102% # ... 2021-04-16 13:44:04 - 13:54:12 IND 2 small gaps, mainly in end 49/54 = 91% # ... 2021-04-17 04:31:53 - 04:41:47 ISA No significant gaps 53/53 = 100% # ... 2021-04-17 16:11:50 - 16:21:57 IND No significant gaps 54/54 = 100% # ... ELFIN B Inner EPD -----------------