Table

Table

Parameters of non-recurrent Forbush decreases (FDs) of the 23^rd cycle (1996-2005) and their solar eruptive sources within
±45 degrees from the disk center. Events associated with major geomagnetic storm (Dst <-100nT) or FD>3.0 %, identified with central eruptions, are included

1	2	3	4	5	6	7	8	9	10	11	12	13
	Geospace disturbance				Identification level	Eruption at the Sun				Magnetic flux Φ, 10²⁰ Mx	Transit times, hours
CDAW No.	FD peak, Date, time	Dst, nT	FD, %	Disturbance onset, Shock, SC Date, time	Identification level	Date, time	Flare Soft X-ray Class	Coordinates	Type	Magnetic flux Φ, 10²⁰ Mx	ΔT_o	ΔT_p
	1997/04/10, 22	-82	3.4	10, 01:04	+	07, 14:07	C6.8	S30E19	AR	74	59	80
3	1997/05/15, 06	-115	1.7	15, 01:59	S1	12, 04:55	C1.3	N21W06	AR	95	69	73
4	1997/10/10, 22	-130	1.1	10, 16:12	S1	06, ~15:00	—	S27E05	non-AR	22	97	103
5	1997/11/07, 20	-110	2.1	06, 22:48	S1	04, 05:58	X2.1	S14W33	AR	161	65	86
	1998/05/02, 21	-85	5.5	01, 21:56	+	29, 16:37	M6.8	S18E20	AR	165	53	76
9	1998/05/04, 23	-205	3.5	04, 02:15	M2	02, 13:42	X1.1	S15W15	AR	220	36	57
16-17	1998/11/09, 04	-149	7.4	08, 04:51	S1, R	05, 19:55	M8.4	N22W18	AR	276	57	80
18	1998/11/14, 13	-131	2.3	13, 01:43	S1	09, 17:58	C2.3	N18E00	non-AR	76	80	115
	1999/06/28, 02	-41	3,2	26, 20:16	+	24, 14:12	C4.1	N29W13	non-AR	62	54	84
21	1999/09/22, 19	-173	1.9	22, 12:22	S1	20, 05:50	C2.8	S21W05	non-AR	47	54	61
22	1999/10/21, 23	-237	2.4	21, 02:25	S1	17, 23:25	C1.2	S26E08	non-AR	64	75	96
24	2000/02/13, 02	-133	3.7	11, 23:52	S1, R	09, 20:06	C7.4	S17W40	AR	138	52	78
26	2000/05/24, 07	-147	3.3	23, 14:25	M2	20, 05:35	C7.6	S15W08	AR	69	80	97
	2000/06/06, 01	-12	4	04, 15:02	-	02, 09:39	C2.4	N10E23	AR	41	53	87
	2000/06/08, 20	-90	7.6	08, 09:10	+	06, 15:25	X2.3	N20E18	AR	454	42	53
	2000/07/13, 23	-43	9	13, 09:42	+	11, 13:10	X1.0	N18E27	AR	259	45	58
	2000/07/15, 03	-57	3.9	14, 15:32	-	12, 10:37	X1.9	N17E27	AR	96	53	64
27	2000/07/16, 04	-301	11.7	15, 14:37	S1	14, 10:24	X5.7	N22W07	AR	470	29	42
	2000/07/20, 05	-93	3,3	19, 15:27	-	17, 11:24	C6.0	N04W06	AR	122	52	66
29	2000/08/12, 16	-235	2.7	11, 18:46	S1	09, 16:22	C2.3	N11W11	AR	132	51	72
30	2000/09/18, 02	-201	8.1	17, 17:00	M2	16, 04:26	M5.9	N14W07	AR	234	37	46
32	2000/10/14, 03	-107	3.6	12, 22:28	S1	09, 23:43	C6.7	N01W14	AR	122	70	99
34	2000/11/07, 06	-159	7.8	06, 09:47	S2, R	03, 19:02	C3.2	N02W02	AR	214	63	83
	2000/11/27, 10	-80	6.9	26, 11:58	-	24, 05:02	X2.0	N20W05	AR	140	55	77
35	2000/11/29, 09	-119	2.7	28, 05:31	M2	26, 16:48	X4.0	N18W38	AR	149	37	64
36	2001/03/20, 01	-149	2.9	19, 11:14	S2, R	15, 21:59	C1.9	N11W09	AR	108	85	99
37	2001/03/31, 23	-387	3.5	31, 00:52	M2	29, 10:15	X1.7	N20W19	AR	377	39	61
	2001/04/08, 19	-59	7.1	08,11:01	+	06, 19:21	X5,6	S21E31	AR	180	40	48
38	2001/04/12, 12	-271	12.8	11, 15:19	M2	10, 05:26	X2.3	S23W09	AR	294	34	55
	2001/04/29, 01	-47	7.9	28, 05:00	+	26, 13:12	M7.8	N17W31	AR	186	40	60
41	2001/08/18, 02	-105	6.3	17, 11:03	S1	14, 12:42	C2.3	N16W36	non-AR	68*	70	85
	2001/08/28, 20	-23	6.5	27, 19:52	+	25, 16:45	X5.3	S17E34	AR	334	51	75
42	2001/09/26, 07	-102	8.3	25, 20:25	S1	24, 10:38	X2.6	S16E23	AR	272	33	44
	2001/09/30, 07	-66	4.3	29, 09:40	-	27, 12:13	M1.0	S18W32	non-AR	77	46	67
43	2001/09/30, 23	-148	2.2	30, 19:24	S1	28, 08:30	M3.3	N08E19	AR	171	58	62
44	2001/10/04, 03	-166	2.5	03, 02:00	S1	29, 11:06	M1.8	N13E03	AR	134	87	112
	2001/10/12, 04	-71	7	11, 17:00	+	09, 11:13	M1.4	S28E08	non-AR	118	54	65
45	2001/10/22, 05	-187	5.4	21, 16:48	S1	19, 16:30	X1.6	N15W29	AR	220	48	60
46	2001/10/28, 15	-157	1.9	28, 03:19	M2	25, 15:02	X1.3	S18W19	AR	293	60	72
48	2001/11/25, 06	-221	9.2	24, 05:56	M2	22, 23:30	M9.9	S14W36	AR	237	30	54
	2001/12/16, 22	-21	4.3	14, 22:00	-	11, 08:08	X2.8	N16E41	AR	159	86	134
	2002/01/11, 21	-72	4.6	10, 03:00	-	08, 20:25	C9.6	NW	non-AR	118	31	73
	2002/03/20, 00	-37	5.1	18, 13:22	+	15, 23:10	M2.2	S08W03	AR	299	62	97
	2002/03/20, 17	-18	4.4	20, 13:28	+	18, 02:31	M1.0	N08E08	AR	124	58	62
50	2002/04/18, 09	-127	6.2	17, 11:07	S1	15, 03:55	M1.2	S15W01	AR	236	55	77
51	2002/04/19, 11	-149	2.9	19, 08:35	S1	17, 07:46	M2.6	S14W34	AR	286	49	51
52	2002/05/11, 12	-110	1.4	11, 10:14	S1	08, 13:27	C4.2	S12W07	AR	137	69	71
	2002/05/19, 08	-58	3.0	18, 20:08	+	16, 00:35	C4.5	S23E15	AR	197	67	79
	2002/07/18, 15	-17	4.3	17, 16:04	+	15, 20:08	X3.0	N19W01	AR	259	44	67
	2002/07/19, 22	-28	4.3	19, 11:09	-	17, 07:13	M8.5	N21W21	AR	118	52	63
	2002/08/20, 07	-106	4.7	18, 18:46	+	16, 11:32	M5.2	S14E20	AR	117	55	91
	2002/09/08, 08	-181	4.6	07, 16:36	+	05, 17:06	C5.2	N09E28	AR	77	48	63
59	2002/10/03, 08	-146	3	02, 22:10	S1	30, 02:00	C2.5	S17W17	non-AR	20	68	78
	2002/11/17, 19	-52	7.4	17, 00:00	+	14, 00:17	M1.0	S20E12	non-AR	175	72	91
63	2003/05/30, 13	-144	7.7	29, 12:24	M2	27, 23:07	X1.3	S07W17	AR	160*	37	62
64	2003/06/20, 16	-141	3.7	18, 05:12	M2	14, ~05:00	—	N22W15	non-AR	46	96	155
66	2003/08/18, 04	-148	2.6	17, 14:21	S1, R	14, 18:38	C3.1	S14E00	AR	177	67	81
	2003/10/28, 10	-32	4	28, 02:06	+	26, 17:31	X1.2	N02W38	AR	257	32	40
67	2003/10/29, 17	-353	28	29, 06:11	S1	28,11:10	X17.2	S16E08	AR	871	19	30
68	2003/10/30, 23	-383	–	30, 16:00	S1	29, 20:49	X10.0	S15W02	AR	521	19	26
69	2003/11/21, 03	-422	4.7	20, 08:03	S1	18, 08:31	M3.9	N00E18	AR	133	47	66
70	2004/01/22, 11	-130	8.6	22,01:37	S1	20, 00:40	C5.5	S13W11	AR	273	49	58
73	2004/07/23, 11	-99	4.3	22, 10:36	S1	20, 12:32	M8.6	N10E35	AR	173	46	70
74	2004/07/24, 16	-136	4.6	24, 06:13	S2, R	22, 22:58	M1.6	N05E04	AR	257	31	41
75	2004/07/27, 06	-170	13.5	26, 22:49	S1	25, 13:49	M2.2	N08W33	AR	363	33	40
76	2004/08/29, 23	-129	0.7	29, 10:05	S2, R	26, 13:04	B8.4	S11W38	AR	46	69	82
77	2004/11/08, 03	-374	5.2	07, 18:27	M2, R	06,00:34	M3.9	N09E05	AR	252	41	50
78	2004/11/10, 02	-263	8.3	09, 18:25	M2, R	07, 16:06	X2.0	N09W17	AR	290	50	58
	2004/12/06, 08	-42	4.6	05, 07:46	+	03, 00:06	M1.5	N08W02	AR	158	56	80
	2005/01/03, 22	-46	4.6	02, 19:00	+	01, 00:31	X1.7	N06E34	AR	87	42	69
	2005/01/18, 03	-103	6.6	17, 07:48	+	15, 23:02	X2.6	N15W05	AR	371	33	52
79	2005/01/19, 02	-80	11.8	18, 06:00	M2, R	17, 09:52	X3.8	N15W25	AR	378	20	40
81	2005/05/09, 03	-110	5.1	08, 08:00	M2, R	06, 17:05	C8.5	S09E28	AR	294	39	58
82	2005/05/15, 08	-247	9.5	15, 02:38	S1	13, 16:57	M8.0	N12E12	AR	266	34	39
84	2005/05/30, 04	-113	4.3	29, 09:52	S2	26, 14:20	B7.5	S12E13	AR	89*	68	86
	2005/07/11, 00	-92	3.4	10, 03:37	+	07, 16:29	M4.9	N09E03	AR	145	60	80
	2006/07/11, 11	-18	4.5	09, 21:36	+	06, 08:36	M2.5	S09W34	AR	91	85	122
	2006/08/20, 09	-78	3.4	19, 11:31	+	16, 16:17	C3.6	S13W15	AR	71	68	89
90	2006/12/15, 03	-162	8.6	14, 14:14	S1	13, 02:40	X3.4	S06W24	AR	222	35	48

Column 1 - An event number corresponding to the Coordinated Data Analysis Workshop (CDAW) Catalog of the severe geomagnetic storms with Dst £100 nT (Zhang, J., Richardson, I.G., Webb, D.F., Gopalswamy, N., Huttunen, E., Kasper, J., et al.: 2007a, J. Geophys. Res. 112, A10102; Zhang, J., Richardson, I.G., Webb, D.F., Gopalswamy, N., Huttunen, E., Kasper, J., et al.: 2007b, J. Geophys. Res. 112, A12103.). Events without numbers are FDs which, according to Richardson I.G. and Cane H.V. (2010 Solar Phys. 264, 189) and the IZMIRAN Data Base, were not accompanied by GMSs of Dst<-100 nT but had the magnitude ³3% and reliable identification with central solar eruptions.

Columns 2-5 - Information on the geospace disturbance, including the FDs peak date and time, minimum Dst value, FD magnitude, date and time of the disturbance onset (SC).

Column 6 - Levels Fds identification with their solar sources: labels S1 and "+" correspond to unambiguous identifications; labels S2, S2R, M2, M2R, and "-" correspond to probable identifications. The letter `R' after the S1, S2, M2 codes indicates that the solar source of the given FD was refined by us in comparison with the CDAW Catalog.

Columns 7-10 - Information on the corresponding solar eruptive source: date and time of the eruption determined mainly from the peak time of the soft X-ray flare emission, its GOES class, and the position of the eruption site. In column 10, the label `AR' means that the eruption occurred in and around an AR, while the label `non-AR' indicates events resulting from filament eruptions outside ARs.

Column 11 - The summarized unsigned magnetic flux in dimmings and arcades at the photospheric level (Φ) in units of 10²⁰Mx. In three events marked by the asterisks, the dimming and arcade areas and the corresponding magnetic fluxes were measured by using two to three suitable 195 Å images obtained with the 6-hour interval.

Columns 12, 13 - The FD onset (ΔT_o) and peak (ΔT_p) transit times, measured from the eruption moment at the Sun (the peak time of an associated soft X-ray burst).