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Table A.1.

List of all the hard microflares analyzed in this paper.

Event # Flare peak timea SO Coord.b Earth Coord.c GOESd δe [-] ARf Categoryg Flare looph
x [′′] y [′′] x [′′] y [′′]
1 22-Sep-2021 10:11:48 100 -830 -422 -555 B1 3.7 ± 0.2 AR12871 within complex
2 22-Sep-2021 18:52:16 140 -800 -375 -560 A6 5.1 ± 0.8 AR12871 within flat
3 22-Sep-2021 20:12:36 150 -800 -400 -530 B3 3.8 ± 0.2 AR12871 within semi-circle
4 4-Oct-2021 06:50:46 -1170 370 -950 210 A1 4.2 ± 0.3 AR12882 within flat
5 4-Oct-2021 08:37:02 -1170 350 -900 217 A2 4.8 ± 0.5 AR12882 within flat
6 4-Oct-2021 09:36:58 -1160 350 -892 223 A1 3.3 ± 0.3 AR12882 within flat
7 9-Oct-2021 00:23:04 10 340 -240 150 < A1 4.0 ± 0.5 AR12882 within tilted
8 11-Oct-2021 19:23:50 780 330 345 165 A2 3.0 ± 0.1 AR12882 within complex
9 3-Feb-2022 02:14:11 1070 300 752 320 A3 3.6 ± 1.6 AR12936 within flat
10 3-Feb-2022 05:53:59 1070 300 775 315 A2 3.4 ± 0.3 AR12936 within flat
11 3-Feb-2022 12:45:24 1100 340 811 334 B1 4.3 ± 1.6 AR12936 edge flat
12 3-Feb-2022 20:41:59 1110 290 820 350 B3 4.9 ± 0.3 AR12936 within -
13 30-Mar-2022 08:38:43 -2740 670 230 355 B1 4.1 ± 0.1 AR12976 within semi-circle
14 8-May-2022 04:20:42 -1190 -260 805 -185 A4 3.1 ± 0.3 AR13003 within complex
15 10-Nov-2022 17:14:35 620 140 25 150 A4 3.7 ± 0.1 AR13141 within unclear
16 12-Nov-2022 04:32:50 980 160 320 160 A4 3.9 ± 0.3 AR13141 edge complex
17 13-Nov-2022 10:25:27 1230 250 576 192 A2 5.1 ± 0.7 AR13141 within semi-circle
18 24-Nov-2022 06:22:24 650 -450 250 -268 B1 4.8 ± 0.3 AR13151 edge complex
19 8-Dec-2022 07:37:56 530 -410 200 -255 A5 4.3 ± 0.4 AR13153 edge complex
20 19-Dec-2022 08:17:20 -510 230 -745 325 A5 3.3 ± 0.5 AR13169 edge semi-circle
21 22-Dec-2022 14:52:04 240 230 -84 330 A3 2.7 ± 0.1 AR13169 within unclear
22 23-Dec-2022 04:34:29 370 220 38 345 A8 3.7 ± 0.4 AR13169 within tilted
23 15-Jan-2023 23:45:12 -410 240 -730 345 A5 4.4 ± 0.3 AR13192 within complex
24 16-Jan-2023 00:29:40 -300 -350 -660 -216 A5 4.5 ± 1.1 AR13190 within complex
25 16-Jan-2023 03:44:12 -280 -350 -637 -210 B1 3.8 ± 0.1 AR13190 within flat
26 21-Feb-2023 02:06:15 300 550 -261 545 A6 4.6 ± 1.8 AR13229 edge tilted
27 28-Feb-2023 13:49:12 1000 610 380 535 A7 4.2 ± 0.5 AR13234 within semi-circle
28 11-Mar-2023 07:52:00 -1820 -230 325 -280 < A1 3.5 ± 0.4 AR13245 within flat
29 11-Mar-2023 14:32:57 1120 -600 390 -325 A7 4.1 ± 0.1 AR13245 within complex
30 11-Mar-2023 21:14:43 1180 -500 422 -260 B1 3.6 ± 0.3 AR13245 within semi-circle
31 11-Mar-2023 22:43:00 1180 -570 424 -290 A8 4.0 ± 0.2 AR13245 within flat
32 12-Mar-2023 06:07:13 1230 -570 475 -300 B2 4.0 ± 0.1 AR13245 within semi-circle
33 12-Mar-2023 17:46:01 1310 -600 551 -310 A2 3.1 ± 0.6 AR13245 within flat
34 3-Apr-2023 18:29:29 -560 -950 171 -310 A1 5.1 ± 1.0 AR13270 within semi-circle
35 18-Oct-2023 20:57:01 2250 400 321 121 A4 5.3 ± 0.3 AR13465 edge unclear
36 30-Oct-2023 03:48:10 250 -730 -215 -346 B2 4.5 ± 0.1 AR13474 within flat
37 23-Nov-2023 07:12:15 -450 170 -525 230 C1 4.1 ± 0.1 AR13492 edge complex
38 30-Nov-2023 15:42:09 650 -510 400 -338 B4 3.8 ± 0.1 AR13500 within unclear
39 26-Dec-2023 23:50:53 900 -400 749 -337 B1 4.6 ± 0.5 AR13529 within flat
a

: STIX nonthermal peak time corrected for the light travel time difference.

b

: Aspect corrected helioprojective coordinates in the Solar Orbiter reference frame. No additional shift is considered.

c

: Helioprojective coordinates in the Solar Dynamics Observatory reference frame.

d

: Pre-flare subtracted GOES class determined at the nonthermal peak time.

e

: Electron spectral index.

f

: NOAA active region number.

g

: If (at least) one of the footpoints is within or at the edge of the sunspot. No distinction is made between umbra and penumbra.

h

: Flare loop geometry determined from the AIA 131 Å maps. There is not AIA coverage for event 12 (footpoint location determined with GONG).

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