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Strongest X flares since Jun 2017 (GOES-16/18)

DateBeginPeakMinClassLocationRegion
2017-09-06 11:5212:0218X14.6––
2017-09-10 15:3416:0657X12.9––
2024-10-03 12:0812:1818X8.9––
2024-05-14 16:4616:5115X8.6––
2026-02-01 23:4423:5720X8.1––
2024-10-01 21:5822:2030X7.0––
2024-05-11 01:1001:2328X5.8––
2025-11-11 09:4910:0428X5.1––
2023-12-31 21:3621:5531X4.9––
2024-05-06 05:3806:3568X4.4––
2024-09-14 15:1315:2933X4.4––
2026-02-04 12:0212:1316X4.2––
2025-11-14 07:4408:3056X4.0––
2024-05-10 06:2706:5438X3.9––
2024-05-15 08:1808:3733X3.4––
2024-02-09 12:5313:1438X3.3––
2017-09-06 08:5209:1025X3.2––
2024-10-24 03:3003:5756X3.2––
2024-05-15 14:2014:3830X2.9––
2023-12-14 16:4717:0224X2.8––
2024-05-27 06:4907:0835X2.8––
2026-02-02 00:3100:369X2.8––
2024-02-16 06:4206:5315X2.5––
2026-04-24 08:0108:1317X2.5––
2025-05-14 08:0408:1927X2.4––
2026-04-24 00:5101:0722X2.4––
2024-11-06 13:2413:4021X2.3––
2022-04-20 03:4103:5722X2.2––
2023-02-17 19:3820:1671X2.2––
2024-05-09 08:4509:1350X2.2––
2024-12-08 08:5009:0619X2.2––
2017-09-07 14:1514:3640X2.1––
2024-10-07 19:0219:1328X2.1––
2023-03-03 17:3917:5221X2.0––
2024-10-31 21:1221:2014X2.0––
2023-01-09 18:3718:5019X1.9––
2024-07-16 13:1113:2624X1.9––
2025-02-23 19:2219:2711X1.9––
2025-12-01 02:2702:4938X1.9––
2026-01-18 17:2718:0984X1.9––
2024-02-21 22:5223:0721X1.8––
2024-10-09 01:2501:5678X1.8––
2024-10-26 06:3207:1982X1.8––
2025-01-04 12:3512:4820X1.8––
2025-06-19 23:3723:5017X1.8––
2024-08-05 13:2413:4029X1.7––
2025-11-04 17:1517:3436X1.7––
2025-11-09 07:0107:3554X1.7––
2023-08-05 21:4522:2158X1.6––
2024-02-22 06:1706:3222X1.6––
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4Γ— larger. Do not compare the two periods directly.