Home › Flare history › Region ranking

Solar flares from active region 6538

C38

M17

LargestX5.51991-03-07

Span13 days

Flares by day

1991-03-054

1991-03-066

1991-03-0711

1991-03-087

1991-03-093

1991-03-107

1991-03-117

1991-03-124

1991-03-131

1991-03-151

1991-03-165

1991-03-174

All flares

Date	Begin	Peak	Min	Class	Location	Region
1991-03-05	02:56	03:12	29	X1.5	S23E88	6538
1991-03-05	08:12	08:19	10	C8.6	S20E90	6538
1991-03-05	09:10	09:16	35	X2.0	S19E93	6538
1991-03-05	23:26	23:26	19	M6.2	S23E79	6538
1991-03-06	02:05	02:06	19	C7.1	S19E74	6538
1991-03-06	03:37	03:38	7	C7.3	S24E75	6538
1991-03-06	05:20	05:27	29	C8.7	S19E72	6538
1991-03-06	07:40	07:43	26	M1.3	S22E77	6538
1991-03-06	20:33	20:38	17	C2.8	S24E70	6538
1991-03-06	22:46	23:04	24	M1.3	S24E67	6538
1991-03-07	01:42	01:52	40	C3.6	S26E76	6538
1991-03-07	02:14	02:16	45	C3.7	S21E67	6538
1991-03-07	03:39	03:49	25	C2.4	S27E75	6538
1991-03-07	06:11	07:48	206	X5.5	S20E66	6538
1991-03-07	07:05	07:10	10	M1.8	S23E64	6538
1991-03-07	13:36	13:39	8	M4.5	S25E59	6538
1991-03-07	14:03	14:04	23	M5.0	S22E62	6538
1991-03-07	20:11	20:20	16	C6.2	S24E62	6538
1991-03-07	20:39	20:43	12	M1.5	S24E56	6538
1991-03-07	22:08	22:26	40	C7.5	S24E61	6538
1991-03-07	23:14	23:19	15	X2.5	S24E53	6538
1991-03-08	01:41	02:32	87	M1.0	S24E54	6538
1991-03-08	03:08	03:44	56	C3.6	S22E53	6538
1991-03-08	11:33	11:45	46	M1.5	S26E49	6538
1991-03-08	15:09	15:17	34	C5.5	S23E47	6538
1991-03-08	16:12	16:22	29	M1.2	S22E50	6538
1991-03-08	19:22	19:29	15	C7.5	S23E44	6538
1991-03-08	20:20	20:29	13	X1.7	S24E43	6538
1991-03-09	12:43	12:45	13	M1.3	S25E46	6538
1991-03-09	14:11	14:13	21	M1.4	S23E34	6538
1991-03-09	21:37	21:42	31	M1.4	S26E36	6538
1991-03-10	02:09	02:23	37	C3.6	S22E28	6538
1991-03-10	05:58	06:04	9	C2.4	S23E32	6538
1991-03-10	06:51	–	39	C7.4	S23E32	6538
1991-03-10	13:03	13:17	22	C3.0	S26E28	6538
1991-03-10	15:09	15:11	50	C5.8	S24E26	6538
1991-03-10	18:06	18:17	23	C9.9	S22E19	6538
1991-03-10	22:40	22:40	16	C5.1	S23E17	6538
1991-03-11	00:35	00:36	5	C3.0	S25E29	6538
1991-03-11	04:28	04:35	20	C1.8	S25E20	6538
1991-03-11	05:31	05:35	5	C2.1	S23E19	6538
1991-03-11	07:34	07:34	40	M3.6	S23E11	6538
1991-03-11	09:04	09:10	18	C5.5	S25E18	6538
1991-03-11	18:59	19:02	9	C3.9	S24E15	6538
1991-03-11	20:34	20:45	38	C2.6	S28E13	6538
1991-03-12	01:32	01:32	7	C5.6	S24E02	6538
1991-03-12	14:46	14:46	47	C2.5	S22W04	6538
1991-03-12	15:40	16:04	28	C2.6	S24E01	6538
1991-03-12	18:19	18:33	49	C3.2	S22W12	6538
1991-03-13	00:48	01:01	36	C5.7	S26W08	6538
1991-03-15	15:33	15:33	8	C3.2	S21W47	6538
1991-03-16	17:20	17:21	5	C3.5	S18W66	6538
1991-03-16	17:51	17:53	9	C4.8	S20W63	6538
1991-03-16	20:06	20:07	13	C8.0	S16W67	6538
1991-03-16	20:21	20:21	8	C7.9	S20W64	6538
1991-03-16	20:46	20:46	14	M1.9	S19W65	6538
1991-03-17	00:24	00:27	18	C4.3	S22W58	6538
1991-03-17	01:42	01:45	38	M1.1	S20W67	6538
1991-03-17	03:01	03:06	10	C7.3	S24W53	6538
1991-03-17	05:38	05:45	24	M1.4	S18W73	6538

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 1.4× larger. Do not compare the two periods directly.

About this page

NOAA active region 6538 produced 60 C+ flares between 1991-03-05 and 1991-03-17.