NOAA Space Weather Prediction Center

Solar Proton Events Affecting the Earth Environment

1976 - Present

Begin Time Yr M/D (UTC)
Maximum Time Yr M/D (UTC)
>10 MeV Maximum (pfu)
Region
Location
Flare Maximum (UTC)
Type II
Radio Emission
Type IV
Linear Speed
Imagery/Misc
1976 04/30 2120
1976 05/01 1700
12
700
S09W47
X2/2B 4/30 2114
N/A
N/A
N/A
N/A
1977 09/19 1430
1977 09/19 2130
200
889
N08W58
X2/3B 09/19 1054
N/A
N/A
N/A
N/A
1977 11/22 1400
1977 11/22 1800
160
939
N24W38
X1/2N 11/22 1006
N/A
N/A
N/A
N/A
1978 02/13 0930
1978 02/14 1000
850
1001
N22W13
M7/0B 02/13 0255
N/A
N/A
N/A
N/A
1978 04/11 1530
1978 04/11 1630
65
1057
N18W54
X2/2B 0411 1353
N/A
N/A
N/A
N/A
1978 04/29 0445
1978 04/30 2000
1,000
1092
N22E41
X5/4B 04/28 1306
N/A
N/A
N/A
N/A
1978 05/07 0420
1978 05/07 0420
100
1095
N22W64
X2/2B 05/07 0330
N/A
N/A
N/A
N/A
1978 06/02 0730
1978 06/02 0935
19
1129
N23W50
M5/2B 05/31 1009
N/A
N/A
N/A
N/A
1978 06/24 0900
1978 06/25 0230
25
1164
N19E18
M2/3B 06/22 1709
N/A
N/A
N/A
N/A
1978 07/13 0300
1978 07/13 1000
20
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1978 09/23 1035
1978 09/24 0400
2,200
1294
N35W50
X1/3B 09/23 1023
N/A
N/A
N/A
N/A
1978 11/10 2130
1978 11/10 2205
38
1385
N17E02
M1/2N 11/10 0042
N/A
N/A
N/A
N/A
1979 02/17 2020
1979 02/17 2205
31
1574
N15E48
X2/2B 02/16 0200
N/A
N/A
N/A
N/A
1979 04/03 1600
1979 04/03 2310
45
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1979 06/06 1850
1979 06/07 0005
950
1781
N20E16
X2/1N 06/05 0529
N/A
N/A
N/A
N/A
1979 07/07 0015
1979 07/07/1010
50
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1979 08/19 0850
1979 08/21 0740
500
1943
N10E90
X6/1B 08/18 1416
N/A
N/A
N/A
N/A
1979 09/15 1500
1979 09/16 1200
60
1994
N10E90
X2/N/A 09/14 0802
N/A
N/A
N/A
N/A
1979 11/16 0430
1979 11/16 1300
75
2110
N34W25
M1/0B 11/15 1639
N/A
N/A
N/A
N/A
1980 02/06 1340
1980 02/06 1850
12
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1980 07/17 2300
1980 07/19 1930
100
2562
S12E06
M3/1B 07/17 0603
N/A
N/A
N/A
N/A
1981 03/30 0900
1981 03/30 2115
30
2993
N13W74
M3/2N 03/30 0049
N/A
N/A
N/A
N/A
1981 04/10 1745
1981 04/11 1400
50
3025
N08W38
X2/3B 04/10 1655
N/A
N/A
N/A
N/A
1981 04/24 1515
1981 04/24 2330
160
3049
N18W50
X5/2B 04/24 1400
N/A
N/A
N/A
N/A
1981 05/09 1200
1981 05/10 2130
150
3099
N09E37
M7/2B 05/08 2252
N/A
N/A
N/A
N/A
1981 05/15 0300
1981 05/16 1950
130
3106
N11E58
X1/3B 05/13 0425
N/A
N/A
N/A
N/A
1981 07/20 1430
1981 07/20 1825
100
3204
S26W75
M5/1B 07/20 1329
N/A
N/A
N/A
N/A
1981 07/25 0600
1981 07/25 1320
18
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1981 08/10 0115
1981 08/10 0435
57
3257
S10E24
M4/2B 08/07 1916
N/A
N/A
N/A
N/A
1981 10/08 1235
1981 10/13 2247
2,000
3390
S19E88
X3/1B 10/07 2308
N/A
N/A
N/A
N/A
1981 12/10 0545
1981 12/11 0900
65
3496
N12W16
M5/3B 12/09 1854
N/A
N/A
N/A
N/A
1982 01/31 0055
1982 01/31 1630
830
3576
S15E12
X1/3B 01/30 2358
N/A
N/A
N/A
N/A
1982 06/06 0245
1982 06/06 0245
10
3763
S09E72
X8/2B 06/03 1146
N/A
N/A
N/A
N/A
1982 06/09 0040
1982 06/09 0510
30
3763
S09E25
X12/3B 06/06 1654
N/A
N/A
N/A
N/A
1982 07/11 0700
1982 07/13 1615
2,900
3804
N17E73
X9/3B 07/09 0742
N/A
N/A
N/A
N/A
1982 07/22 2030
1982 07/23 0220
240
3804
N29W86
M4/0F 07/22 1734
N/A
N/A
N/A
N/A
1982 09/05 2205
1982 09/06 0100
66
3886
N11E30
M4/3N 09/04 0400
N/A
N/A
N/A
N/A
1982 11/22 1940
1982 11/22 2140
40
3994
S11W43
M7/1N 11/22 1828
N/A
N/A
N/A
N/A
1982 11/26 0605
1982 11/26 1500
25
3994
S11W86
X4/2B 11/26 0253
N/A
N/A
N/A
N/A
1982 12/08 0010
1982 12/08 1000
1,000
4007
S19W86
X2/1B 12/07 2354
N/A
N/A
N/A
N/A
1982 12/17 1845
1982 12/18 0945
130
4026
S10E24
X12/2B 12/15 0202
N/A
N/A
N/A
N/A
1982 12/19 1920
1982 12/20 0515
85
4022
N10W75
M9/2B 12/19 1624
N/A
N/A
N/A
N/A
1982 12/27 0600
1982 12/27 1345
190
4033
S14E31
X2/1B 12/25 0752
N/A
N/A
N/A
N/A
1983 02/03 1200
1983 02/04 1620
340
4077
S19W00
X4/3B 02/03 0619
N/A
N/A
N/A
N/A
1983 06/15 0435
1983 06/15 1800
18
4201
Farside event
N/A 06/14
N/A
N/A
N/A
N/A
1984 02/16 0915
1984 02/16 1005
660
4408
Farside event
N/A
N/A
N/A
N/A
N/A
1984 02/19 1310
1984 02/21 1415
55
4421
N16E82
X2/2B 02/17 2301
N/A
N/A
N/A
N/A
1984 03/13 1440
1984 03/13 1450
10
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1984 03/14 0405
1984 03/14 0505
100
4433
S12W42
M2/1B 03/14 0334
N/A
N/A
N/A
N/A
1984 04/25 1330
1984 04/26 1420
2,500
4474
S12E43
X13/3B 04/25 0025
N/A
N/A
N/A
N/A
1984 05/24 1045
1984 05/24 1140
31
4492
S09E24
M6/2B 05/22 1503
N/A
N/A
N/A
N/A
1984 05/31 1315
1984 05/31 1415
14
4492
S09W90
M1/?? 05/31 1142
N/A
N/A
N/A
N/A
1985 01/22 0415
1985 01/22 0550
14
4617
S08W38
X4/2B 01/21 2350
N/A
N/A
N/A
N/A
1985 04/25 1430
1985 04/26 0600
160
4647
N06E27
X1/3B 04/24 0935
N/A
N/A
N/A
N/A
1985 07/09 0235
1985 07/09 0325
140
4671
S16W36
M2/1B 07/09 0204
N/A
N/A
N/A
N/A
1986 02/06 0825
1986 02/07 1730
50
4711
S04W06
X1/3B 02/06 0625
Yes
Yes
N/A
N/A
1986 02/07 1310
1986 02/07 1750
77
4711
S10W20
M5/2B 02/07 0913
Yes
Yes
N/A
N/A
1986 02/14 1455
1986 02/14 2110
111
4713
N01W76
M6/1N 02/14 0929
N/A
N/A
N/A
N/A
1986 03/06 1835
1986 03/06 1930
13
4717
N02E01
C4/1F 03/06 1703
No
No
N/A
N/A
1987 11/08 0145
1987 11/08 0945
41
4875
N31W90
M1/N/A 11/07 2013
Yes
Yes
N/A
N/A
1988 01/03 0100
1988 01/03 0730
32
4912
S34W18
X1/3B 01/02 2144
Yes
Yes
N/A
N/A
1988 03/25 2250
1988 03/25 2310
33
4965
N22W90
C4/N/A 03/25 2153
Yes
Yes
N/A
N/A
1988 06/30 1125
1988 06/30 1135
12
5060
S16E22
M9/2B 06/30 0905
Yes
No
N/A
N/A
1988 08/26 0030
1988 08/26 0045
12
5123
N24E88
M2/SF 08/23 1735
Yes
No
N/A
N/A
1988 12/17 2220
1988 12/18 0150
12
5278
N26E37
X4/1B 12/16 0845
Yes
Yes
N/A
N/A
1989 03/08 1755
1989 03/10 0000
137
5395
N35E69
X15/3B 03/06 1406
Yes
Yes
N/A
N/A
1989 03/10 2205
1989 03/13 0645
1,860
5395
N31E22
X4/3B 03/17 1744
Yes
Yes
N/A
N/A
1989 03/17 1900
1989 03/18 0920
1,250
5395
N33W60
X6/2B 03/17 1743
Yes
Yes
N/A
N/A
1989 03/23 2055
1989 03/23 2220
29
5409
N18W28
X1/3B 03/23 1958
Yes
Yes
N/A
N/A
1989 04/11 1555
1989 04/12 0005
218
N/A
N37W12
M1/SF 04/10 2323
No
No
N/A
N/A
1989 05/06 0615
1989 05/06 1055
47
5470
N30E01
X2/3B 05/05 0736
Yes
Yes
N/A
N/A
1989 07/25 0935
1989 07/25 1220
32
5603
N25W84
X2/2N 07/25 0843
Yes
Yes
N/A
N/A
1989 08/12 1620
1989 08/13 0705
6,550
5629
S16W37
X2/2B 08/12 1426
Yes
Yes
N/A
N/A
1989 08/15 0620
1989 08/15 1725
351
5629
S18W73
X1/SF 06/15 0313
No
Yes
N/A
N/A
1989 08/16 0125
1989 08/16 1425
1,430
5629
S18W84
X20/2N 08/16 0123
Yes
Yes
N/A
N/A
1989 08/17 0615
1989 08/17 0945
986
5629
S19W88
X2/SF 08/17 0121
No
No
N/A
N/A
1989 08/19 1725
1989 08/20 0155
258
5629
S16W100
C8/N/A 08/19 2008
Yes
No
N/A
N/A
1989 09/04 0240
1989 09/04 0920
16
5603
S18E16
X1/1B 09/03 1431
No
No
N/A
N/A
1989 09/12 2210
1989 09/13 0825
32
5669
S19W90
M5/N/A 09/12 0814
Yes
No
N/A
N/A
1989 09/29 1200
1989 09/30 0210
2,960
5698
S27W90
X9/N/A 09/29 1132
No
Yes
N/A
N/A
1989 10/19 1310
1989 10/20 1600
42,200
5747
S27E10
X13/4B 10/19 1306
Yes
Yes
N/A
N/A
1989 10/22 1755
1989 10/23 0715
5,330
5747
S27W31
X2/2B 10/22 1804
Yes
Yes
N/A
N/A
1989 10/24 1825
1989 10/25 0210
2,530
5747
S33W61
X5/3B 10/24 1829
Yes
Yes
N/A
N/A
1989 10/29 0620
1989 10/29 1005
24
5747
S27W90
M4/N/A 10/29 0450
Yes
Yes
N/A
N/A
1989 11/09 0345
1989 11/09 0445
15
5769
S20W57
M9/2B 11/08 1912
No
No
N/A
N/A
1989 11/15 0755
1989 11/15 0905
38
5786
N11W26
X3/3B 11/15 0658
Yes
Yes
N/A
N/A
1989 11/27 2140
1989 11/28 1105
165
5800
N25W03
M4/2B 11/26 1941
No
Yes
N/A
N/A
1989 11/30 1410
1989 12/01 1330
3,590
5800
N24W52
X2/3B 11/30 1230
No
No
N/A
N/A
1990 03/19 0705
1990 09/19 2315
946
5969
N31W43
X1/2B 03/19 0700
Yes
Yes
N/A
N/A
1990 03/29 0920
1990 03/29 1005
15
5988
S04W37
M4/2N 03/28 0750
No
Yes
N/A
N/A
1990 04/07 2220
1990 04/08 1355
19
6007
N23E82
X1/1N 04/03 1725
Yes
No
N/A
N/A
1990 04/11 2120
1990 04/11 2120
13
6007
N22W04
M1/1N 04/10 1214
No
Yes
N/A
N/A
1990 04/17 0400
1990 04/17 0700
12
6022
N32E57
X1/2B 04/15 0300
Yes
Yes
N/A
N/A
1990 04/28 1005
1990 04/28 1735
149
6038
N18W38
C2/SF 04/28 0026
Yes
No
N/A
N/A
1990 05/21 2355
1990 05/22 0750
409
6063
N35W36
X5/2B 05/21 2218
No
Yes
N/A
N/A
1990 05/24 2125
1990 05/25 0115
177
6063
N33W78
X9/1B 05/24 2050
Yes
Yes
N/A
N/A
1990 05/26 2110
1990 05/27 0120
88
6063
N33W90
X1/N/A 05/26 2057
No
Yes
N/A
N/A
1990 05/28 0645
1990 05/29 0100
45
6063
N33W90
C1/N/A 05/28 0433
No
Yes
N/A
N/A
1990 06/12 1140
1990 06/12 1700
79
6089
N10W33
M6/2B 06/12 0540
No
Yes
N/A
N/A
1990 07/26 1100
1990 07/26 2315
20
6174
S15E55
M2/2N 07/25 2333
No
Yes
N/A
N/A
1990 08/01 0020
1990 08/01 2045
227
6180
N20E45
M4/2B 07/30 0736
Yes
Yes
N/A
N/A
1991 01/31 1130
1991 01/31 1620
242
6469
S17W35
X1/2B 01/31 0229
Yes
Yes
N/A
N/A
1991 02/25 1200
1991 02/25 1305
12
6497
S16W80
X1/2N 02/25 0818
Yes
Yes
N/A
N/A
1991 03/23 0820
1991 03/24 0350
43,500
6555
S26E28
X9/3B 03/22 2246
Yes
No
N/A
N/A
1991 04/03 0815
1991 04/04 1000
52
6562
N14W00
M6/3B 04/02 2326
No
Yes
N/A
N/A
1991 05/13 0300
1991 05/13 0905
358
6615
S10W90
M8/N/A 05/13 0142
Yes
Yes
N/A
N/A
1991 05/31 1150
1991 06/01 0500
22
6654
N05E38
X1/2B 05/29 2344
No
Yes
N/A
N/A
1991 06/04 0820
1991 06/07 0400
224
6659
N30E70
X12/3B 06/04 0352
Yes
Yes
N/A
N/A
1991 06/11 0250
1991 06/11 1420
3,000
6659
N31W17
X12/3B 06/11 0209
Yes
Yes
N/A
N/A
1991 06/15 0835
1991 06/15 1955
1,400
6659
N33W69
X12/3B 06/15 0821
N/A
N/A
N/A
N/A
1991 06/30 0555
1991 07/02 1010
106
6703
N30E90
M6/N/A 06/28 0625
Yes
Yes
N/A
N/A
1991 07/07 0455
1991 07/08 1650
2,310
6703
N26E03
X1/2B 07/07 0222
Yes
No
N/A
N/A
1991 07/11 0035
1991 07/11 0450
30
6718
S22E34
M3/2N 07/10 1227
Yes
Yes
N/A
N/A
1991 07/11 2255
1991 07/12 0305
17
6703
N22W51
M7/3B 07/11 1037
Yes
No
N/A
N/A
1991 08/26 1730
1991 08/27 1830
236
6805
N24E77
X2/2B 08/25 0113
No
Yes
N/A
N/A
1991 10/01 1700
1991 10/01 1810
12
6853
S21E32
M7/4B 09/29 1533
No
Yes
N/A
N/A
1991 10/28 1300
1991 10/28 1440
39
6891
S13E15
X6/3B 10/27 0547
Yes
Yes
N/A
N/A
1991 10/30 0745
1991 10/30 0810
94
6891
S08W25
X2/3B 10/30 0632
Yes
Yes
N/A
N/A
1992 02/07 0645
1992 02/07 1115
77
7042
S13W10
M4/2B 02/06 1047
No
Yes
N/A
N/A
1992 03/16 0830
1992 03/16 0900
10
7100
S14E29
M7/3B 03/15 0153
Yes
Yes
N/A
N/A
1992 05/09 0940
1992 05/09 2100
4,650
7154
S26E08
M7/4B 05/08 1545
No
Yes
N/A
N/A
1992 06/25 2045
1992 06/26 0615
389
7205
N09W67
X3/2B 06/25 2013
No
Yes
N/A
N/A
1992 06/28 0950
1992 06/29 0235
24
7205
N11W90
X1/SF 06/28 1400
Yes
No
N/A
N/A
1992 08/06 1145
1992 08/06 1210
14
7248
S09E68
M4/1N 08/03 0706
No
No
N/A
N/A
1992 10/30 1920
1992 10/31 0710
2,680
7321
S22W61
X1/2B 10/30 1815
No
Yes
N/A
N/A
1992 11/02 0305
1992 11/02 0910
1,060
7321
S23W90
X9/2B 11/02 0307
Yes
Yes
N/A
N/A
1993 03/04 1455
1993 03/04 1615
17
7434
S14W56
C8/2N 03/04 1239
No
Yes
N/A
N/A
1993 03/12 2010
1993 03/13 0155
43
7440
S00W51
M7/3B 03/12 1815
Yes
Yes
N/A
N/A
1994 02/20 0305
1994 02/21 0900
10,200
7671
N09W02
M4/3B 02/20 0141
Yes
Yes
N/A
N/A
1994 10/20 0030
1994 10/20 0340
35
7790
N12W24
M3/1F 10/19 2127
Yes
Yes
N/A
N/A
1995 10/20 0825
1995 10/20 1210
62
7912
S09W55
M1/0F 10/20 0607
Yes
Yes
N/A
N/A
1997 11/04 0830
1997 11/04 1300
67
8100
S14W33
X2/2B 11/04 0558
Yes
Yes
785 km/s
C2
1997 11/06 1305
1997 11/07 0255
490
8100
S18W63
X9/2B 11/06 1155
N/A
N/A
1300 km/s
C2
1998 04/20 1405
1998 04/21 1145
161
8210
S20W100
M1/N/A 04/20 1021
Yes
No
1863 km/s
C2
1998 05/02 1415
1998 05/02 1655
149
8210
S15W15
X1/3B 05/02 1342
No
Yes
938 km/s
C2
1998 05/06 0840
1998 05/06 0945
239
8210
S11W65
X2/1N 05/06 0809
Yes
Yes
1099 km/s
C2
1998 05/09 2055
1998 05/10 0020
12
8210
S17W100
M7/N/A 05/09 0340
Yes
Yes
2331 km/s
C2
1998 08/24 2355
1998 08/26 1055
665
8307
N35E09
X1/3B 08/24 2213
Yes
Yes
N/A
N/A
1998 09/24 2355
1998 09/25 0130
44
8340
N18E09
M6/3B 09/23 0713
Yes
Yes
N/A
N/A
1998 09/30 1520
1998 10/01 0025
1160
8340
N23W80
M2/2N 09/30 1350
Yes
Yes
N/A
N/A
1998 11/14 0810
1998 11/14 1245
314
8385
N28W100
C1/N/A 11/14 0508
No
Yes
N/A
N/A
1999 01/23 1000
1999 01/23 1135
14
8421
N27W100
M5/N/A 01/20 2024
Yes
Yes
N/A
N/A
1999 04/24 1820
1999 04/25 0055
31
8517
N22W130
N/A
No
No
1495 km/s
C2
1999 05/05 1820
1999 05/05 1955
14
8525
N15E32
M4/2N 05/03 0602
Yes
Yes
1584 km/s
C2
1999 06/02 0220
1999 06/02 1010
48
N/A
N00W100
N/A
No
No
1772 km/s
C2
1999 06/04 0925
1999 06/04 1055
64
8552
N17W69
M3/2B 06/04 0703
Yes
Yes
2230 km/s
C2
2000 02/18 1115
2000 02/18 1215
13
8858
N00W120
N/A
Yes
No
890 km/s
C2
2000 04/04 2055
2000 04/05 0930
55
8933
N16W66
C9/2F 04/04 1541
Yes
Yes
1188 km/s
C2
2000 06/07 1310
2000 06/08 0940
84
9026
N21E12
X2/3B 06/06 1525
Yes
Yes
1119 km/s
C2
2000 06/10 1805
2000 06/10 2045
46
9026
N22W38
M5/3B 06/10 1702
Yes
Yes
1108 km/s
C2
2000 07/14 1045
2000 07/15 1230
24,000
9077
N22W07
X5/3B 07/14 1024
Yes
Yes
1674 km/s
C2 EIT
2000 07/22 1320
2000 07/22 1405
17
9085
N15W56
M3/2N 07/22 1114
Yes
Yes
1230 km/s
C2
2000 07/28 0520
2000 07/28 0655
21
N/A
N00W120
N/A
No
No
905 km/s
C2
2000 08/11 1650
2000 08/11 1655
17
9114
N11W10
C2/SF 08/09 1647
No
No
702 km/s
C2
2000 09/12 1605
2000 09/13 0340
321
9163
S19W08
M1/2F 09/12 1213
Yes
No
1550 km/s
C2
2000 10/16 1110
2000 10/16 1840
15
9182
N02W90
M2/N/A 10/16 1139
Yes
Yes
1336 km/s
C2
2000 10/26 0040
2000 10/26 0340
15
9182
N02W90
C4/N/A 10/25 1125
No
No
770 km/s
C2
2000 11/08 2350
2000 11/09 1555
14,800
9213
N10W77
M7/3F 11/08 2328
No
Yes
1738 km/s
C2 EIT
2000 11/24 1600
2000 11/24 2120
93
9236
N22W07
X2/2B 11/24 1513
Yes
No
1245 km/s
C2
2000 11/25 2340
2000 11/26 1715
591
9240
N07E50
M8/2N 11/25 0131
Yes
Yes
2519 km/s
C2
2000 11/26 1845
2000 11/26 2030
942
9236
N21W33
X4/2B 11/26 1648
Yes
No
980 km/s
C2
2001 04/18 0315
2001 04/18 1045
32
9415
S20W90
C2/N/A 04/18 0314
Yes
No
2465 km/s
C2
2001 04/28 0430
2001 04/28 0500
57
9433
N17W23
M7/2N 04/26 1312
Yes
Yes
1006 km/s
C2
2001 06/15 1750
2001 06/16 0005
26
N/A
N00W115
N/A
Yes
Yes
1701 km/s
C2
2001 08/16 0135
2001 08/16 0355
493
N/A
S20W180
N/A
No
No
1575 km/s
C2
2001 09/24 0925
2001 09/25 2235
12,900
9632
S16E23
X2/2B 09/24 1038
No
Yes
2402 km/s
C2 EIT
2001 10/01 1245
2001 10/02 0810
2,360
9628
S18W90
M9/N/A 10/01 0515
No
No
1405 km/s
C2
2001 10/19 2225
2001 10/19 2230
11
9661
N16W18
X1/2B 10/19 0105
Yes
Yes
558 km/s
C2
2001 10/22 1910
2001 10/22 2130
24
9672
S21E18
M6/2N 10/22 1508
Yes
Yes
1336 km/s
C2
2001 11/04 1705
2001 11/06 0215
31,700
9684
N06W18
X1/3B 11/04 1620
Yes
Yes
1329 km/s
C2
2001 11/19 1050
2001 11/20 0010
34
9704
S13E42
M2/1N 11/17 0525
Yes
Yes
1379 km/s
C2
2001 11/22 2320
2001 11/24 0555
18,900
9704
S15W34
M9/2N 11/22 2330
Yes
Yes
1437 km/s
C2 EIT
2001 12/26 0605
2001 12/26 1115
779
9742
N08W54
M7/1B 12/26 0540
Yes
Yes
1446 km/s
C2
2001 12/29 0510
2001 12/29 0815
76
9742
N08W54
M7/1B 12/26 0540
Yes
Yes
1446 km/s
C2
2001 12/30 2135
2001 12/31 1620
108
9767
S23E90
X3/N/A 12/28 2045
Yes
No
2216 km/s
C2
2002 01/10 2015
2002 01/11 0530
91
N/A
S00E90
C9/N/A 01/08 2025
No
No
1794 km/s
C2
2002 01/15 1110
2002 01/15 2000
15
9767
S18W90
M4/N/A 01/14 0627
Yes
No
1492 km/s
C2
2002 02/20 0730
2002 02/20 0755
13
9825
N12W72
M5/1N 02/20 0612
Yes
Yes
952 km/s
C2
2002 03/17 0820
2002 03/17 0850
13
9866
S08W03
M2/1F 03/15 2312
No
Yes
957 km/s
C2
2002 03/18 1300
2002 03/19 0650
53
9870
S15W22
M1/SF 03/18 0231
No
Yes
989 km/s
C2
2002 03/20 1515
2002 03/20 1525
19
9870
S15W22
M1/SF 03/18 0231
No
Yes
989 km/s
C2
2002 03/22 2020
2002 03/23 1320
16
9866
S09W90
M1/N/A 03/22 1113
No
No
1750 km/s
C2
2002 04/17 1530
2002 04/17 1540
24
9906
S13W37
M2/2N 04/17 0824
Yes
Yes
1240 km/s
C2
2002 04/21 0225
2002 04/21 2320
2,520
9906
S13W37
X1/1F 04/21 0151
Yes
Yes
2393 km/s
C2
2002 05/22 1755
2002 05/23 1055
820
N/A
S22W53
C5/SF 05/22 0349
No
No
1557 km/s
C2
2002 07/07 1830
2002 07/07 1955
22
10017
S19W100
M1/N/A 07/07 1143
No
No
1329 km/s
C2
2002 07/16 1750
2002 07/17 1600
234
10030
N19W01
X3/3B 07/15 2008
No
Yes
1151 km/s
C2
2002 07/22 0625
2002 07/23 1025
28
10039
S12E90
X3/N/A 07/20 2130
Yes
No
1941 km/s
C2
2002 08/14 0900
2002 08/14 1620
26
10061
N09W54
M2/1N 08/14 0212
Yes
No
1309 km/s
C2
2002 08/22 0440
2002 08/22 0940
36
10069
S07W62
M5/2B 08/22 0157
Yes
Yes
998 km/s
C2
2002 08/24 0140
2002 08/24 0835
317
10069
S02W81
X3/1F 08/24 0112
Yes
Yes
1913 km/s
C2
2002 09/07 0440
2002 09/07 1650
20
10102
N10E28
C5/SF 09/05 1706
Yes
No
1748 km/s
C2
2002 11/09 1920
2002 11/10 0540
404
10180
S12W29
M4/2B 11/09 1323
Yes
Yes
1838 km/s
C2
2003 05/28 2340
2003 05/29 1530
121
10365
S06W24
X3/2B 05/28 0027
Yes
Yes
1366 km/s
C2
2003 05/31 0440
2003 05/31 0645
27
10365
S07W65
M9/2B 05/31 0224
Yes
Yes
1835 km/s
C2
2003 06/18 2125
2003 06/19 0415
19
10386
S09E60
M6/SF 06/17 2255
Yes
Yes
1813 km/s
C2
2003 10/26 1825
2003 10/26 2235
466
10484
N02W38
X1/1N 10/26 1815
Yes
No
1537 km/s
C2
2003 10/28 1215
2003 10/29 0615
29,500
10486
S16E08
X17/4B 10/28 1110
Yes
Yes
2459 km/s
C2 EIT
2003 10/29 2100
2003 10/30 1935
3,300
10486
S15W02
X10/2B 10/29 2049
Yes
Yes
2029 km/s
C2
2003 11/02 1735
2003 11/03 0815
1,570
10486
S14W56
X8/2B 11/02 1725
Yes
Yes
2598 km/s
C2
2003 11/04 2225
2003 11/05 0600
353
10486
S19W83
X28/3B 11/04 1952
Yes
Yes
2657 km/s
C2
2003 11/21 2355
2003 11/22 0230
13
10501
N02W17
M5/2B 11/20 2353
No
No
494 km/s
C2
2003 12/02 1555
2003 12/02 1820
88
10508
S17W95
C8/N/A 12/02 1150
No
No
1393 km/s
C2
2004 04/11 1135
2004 04/11 1845
35
10588
S14W47
C9/1F 04/11 0419
No
No
1645 km/s
C2
2004 07/25 1825
2004 07/25 2250
2,090
10652
N08W33
M9/1F 07/25 1520
Yes
Yes
1333 km/s
C2
2004 09/13 2005
2004 09/14 0005
273
10672
N04E42
M4/2N 09/12 0056
Yes
Yes
1328 km/s
C2
2004 09/19 1925
2004 09/20 0100
57
10672
N03W58
M1/N/A 09/19 1712
Yes
Yes
N/A
C2
2004 11/01 0655
2004 11/01 0805
63
N/A
S00W120
N/A
No
No
800 km/s
N/A
2004 11/07 1910
2004 11/08 0115
495
10696
N09W17
X2/N/A 11/07 1606
Yes
Yes
1759 km/s
C2
2004 11/09 2030
2004 11/09 2130
82
10696
N07W51
M8/2N 11/09 1719
Yes
Yes
1853 km/s
C2
2004 11/10 0255
2004 11/10 1655
424
10696
N09W49
X2/3B 11/10 0213
Yes
Yes
3387 km/s
C2
2005 01/16 0210
2005 01/17 1750
5040
10720
N15W05
X2/N/A 01/15 2302
N/A
N/A
2861 km/s
C2
2005 05/14 0525
2005 05/15 0240
3140
10759
N12E11
M8/2B 05/13 1657
N/A
N/A
1689 km/s
C2
2005 06/16 2200
2005 06/17 0500
44
10775
N09W87
M4/N/A 06/16 2022
N/A
N/A
N/A
N/A
2005 07/14 0245
2005 07/15 0345
134
10786
N10W80
M5/N/A 07/13 1449
N/A
N/A
1423 km/s
C2
2005 07/27 2300
2005 07/29 1715
41
10792
N11E90
M3/N/A 07/27 0502
N/A
N/A
1787 km/s
C2
2005 08/22 2040
2005 08/23 1045
330
10798
S12W60
M5/1N 08/22 1727
N/A
N/A
2378 km/s
C2
2005 09/08 0215
2005 09/11 0425
1880
10808
S06E89
X17/3B 09/07 1740
N/A
N/A
N/A
N/A
2006 12/06 1555
2006 12/07 1930
1980
10930
S07E79
X9/2N 12/05 1035
N/A
N/A
N/A
N/A
2006 12/13 0310
2006 12/13 0925
698
10930
S05W23
X3/4B 12/13 0240
N/A
N/A
1774 km/s
C2
2010 08/14 1230
2010 08/14 1245
14
11099
N17W52
C4/SF 08/14 1005
N/A
N/A
1205 km/s
C2
2011 03/08 0105
2011 03/08 0800
50
11164
N24W59
M3/N/A 03/07 2012
N/A
N/A
2125 km/s
C2
2011 03/21 1950
2011 03/22 0135
14
11169
Farside
N/A
N/A
N/A
1341 km/s
C2
2011 06/07 0820
2011 06/07 1820
73
11226
S21W64
M2/2N 06/07 0641
N/A
N/A
1255 km/s
C2
2011 08/04 0635
2011 08/05 2150
96
11261
N15W49
M9/2B 08/04 0357
N/A
N/A
1315 km/s
C2
2011 08/09 0845
2011 08/09 1210
26
11263
N17W83
X6/2B 08/09 0805
N/A
N/A
1610 km/s
C2
2011 09/23 2255
2011 09/26 1155
35
11302
N11E74
X1/2N 09/22 1101
N/A
N/A
1905 km/s
C2
2011 11/26 1125
2011 11/27 0125
80
11353
N08W49
C1/N/A 11/26 0710
N/A
N/A
933 km/s
C2
2012 01/23 0530
2012 01/24 1530
6310
11402
N28W36
M8/2B 01/23 0359
N/A
Yes
2175 km/s
C2 SDO
2012 01/27 1905
2012 01/28 0205
796
11402
N27W71
X1/1F 01/27 1837
N/A
N/A
2508 km/s
C2 SDO
2012 03/07 0510
2012 03/08 1115
6530
11429
N17E15
X5/3B 03/07 0024
N/A
N/A
2684 km/s
C2 SDO
2012 03/13 1810
2012 03/13 2045
469
11429
N18W62
M7/1B 03/13 1741
Yes
Yes
1884 km/s
C2
2012 05/17 0210
2012 05/17 0430
255
11476
N12W89
M5/N/A 05/17 0147
N/A
N/A
1582 km/s
C2
2012 05/27 0535
2012 05/27 1045
14
11428
Farside
N/A
N/A
N/A
1966 km/s
C2
2012 06/16 1955
2012 06/16 2020
14
11504
S17E14
M1/N/A 06/14 1435
N/A
Yes
987 km/s
C2
2012 07/07 0400
2012 07/07 0745
25
11515
S18W50
X1/N/A 07/06 2308
N/A
N/A
1828 km/s
C2
2012 07/09 0130
2012 07/09 0430
19
11515
S17W74
M6/1N 07/08 1632
YES
N/A
2711 km/s
C2 SDO
2012 07/12 1835
2012 07/12 2225
96
11520
S16W09
X1/2B 07/12 1649
N/A
N/A
885 km/s
C2
2012 07/17 1715
2012 07/18 0600
136
11520
S17W75
M1/N/A 07/17 1715
N/A
N/A
958 km/s
C2
2012 07/23 1545
2012 07/23 2145
12
11520
Farside
N/A
N/A
N/A
2003 km/s
C2
2012 09/01 1335
2012 09/02 0850
60
N/A
S06E20
C8/N/A 08/31 2043
N/A
N/A
567 km/s
C2
2012 09/28 0300
2012 09/28 0445
28
11577
N08W41
C3/N/A 09/27 2357
N/A
N/A
947 km/s
C2
2013 03/16 1940
2013 03/17 0700
16
11692
N11E12
M1/N/A 03/15 0658
N/A
N/A
1063 km/s
C2
2013 04/11 1055
2013 04/11 1645
114
11719
N09E12
M6/N/A 04/11 0716
N/A
N/A
861 km/s
C2
2013 05/15 1325
2013 05/17 1720
42
11748
N11E51
X1/N/A 05/15 0148
N/A
N/A
1366 km/s
C2
2013 05/22 1420
2013 05/23 0650
1660
11745
N15W70
M5/N/A 05/22 1332
N/A
N/A
1466 km/s
C2 SDO
2013 06/23 2014
2013 06/24 0520
14
11777
S16E66
M2/N/A 06/21 0314
N/A
N/A
1900 km/s
C2
2013 09/30 0505
2013 09/30 2005
182
DSF
N15W40
C1/N/A 09/29 2337
N/A
N/A
1179 km/s
C2
2013 12/28 2150
2013 12/28 2315
29
11936
S18E07
C9/N/A 12/28 1802
N/A
N/A
1118 km/s
C2
2014 01/06 0915
2014 01/06 1600
42
11936
Farside
N/A
No
N/A
1402 km/s
C2
2014 01/06 0915
2014 01/09 0340
1026
11944
S15W11
X1/N/A 01/07 1832
Yes
Yes
1830 km/s
C2 SDO
2014 02/20 0850
2014 02/20 0925
22
11976
S15W67
M3/N/A 02/20 0756
Yes
Yes
948 km/s
C2
2014 02/25 1355
2014 02/25 0845
103
11990
S12E82
X4/N/A 02/25 0049
Yes
Yes
2147 km/s
C2 SDO
2014 04/18 1525
2014 04/19 0105
58
12036
S16W41
M7/N/A 04/18 1303
Yes
Yes
1203 km/s
C2
2014 09/11 0240
2014 09/12 1555
126
12158
N16W06
X1/N/A 09/10 1745
Yes
Yes
1267 km/s
C2
2015 06/18 1135
2015 06/18 1445
17
12365
SW limb
M1/N/A 06/18 0127
No
No
1714 km/s
C2
2015 06/21 2135
2015 06/22 1900
1066
12371
N13W00
M2/1N 06/21 0142
Yes
Yes
1366 km/s
C2
2015 06/26 0350
2015 06/27 0030
22
12371
N12W40
M7/N/A 06/25 0816
Yes
Yes
1627 km/s
C2
2015 10/29 0550
2015 10/29 1000
23
12434
Farside
N/A
N/A
N/A
530 km/s
C2
2016 01/02 0430
2016 01/02 0450
21
12473
S21W73
M2/N/A 01/02 0011
Yes
Yes
1730 km/s
C2
2017 07/14 0900
2017 07/14 2320
22
12665
S06W29
M2/N/A 07/14 0209
Yes
Yes
1200 km/s
C2
2017 09/05 0040
2017 09/08 0035
844
12673
S11W16
M5/N/A 09/04 2033
Yes
No
1418 km/s
C2
2017 09/10 1645
2017 09/11 1145
1494
12673
S08W83
X8/N/A 09/10 1606
Yes
Yes
3163 km/s
C2
2021 05/29 0300
2021 05/29 0320
15
12824
N21W63
C9/1F 05/28 2313
Yes
Yes
971 km/s
C2
2021 10/28 1635
2021 10/29 0250
29
12887
S26W04
X1/2N 10/28 1535
Yes
Yes
1519 km/s
C2
2021 10/30 2100
2021 10/30 2105
11
12887
S26W04
X1/2N 10/28 1535
Yes
Yes
1519 km/s
ESP enhancement during decay of previous event
2022 03/28 1325
2022 03/28 1450
19
12975
N13W06
M4/2N 03/28 1129
Yes
Yes
702 km/s
C2 data C2 X-Ray
2022 03/31 0620
2022 03/31 0630
11
12975
N13W31
X1/N/A 03/30 1737
Yes
Yes
641 km/s
C2 data C2 X-Ray
2022 04/02 1430
2022 04/02 1600
32
12976
N15W61
M3/SN 03/28 1129
Yes
Yes
1433 km/s
C2 data C2 X-Ray
2022 08/27 1155
2022 08/27 1220
27
13088
N13W34
M1/N/A 08/27 1138
No
No
N/A
No data
2023 02/25 2110
2023 02/26 0440
58
13229
N26W43
M6/3N 02/25 1944
Yes
No
1170 km/s
C2 dataC2 X-Ray
2023 03/13 0735
2023 03/15 0425
22
Farsided
N/A
farside event
No
No
1699 km/s
Event started on 13 Mar then an additional enhancement was observed with CME shock C2 X-Ray
C2 data
2023 04/23 1815
2023 04/23 1820
26
13283
S22W14
M1.7 04/21 1812
Yes
Yes
1284 km/s
Imagery not yet available
2023 05/08 1240
2023 05/09 0150
38
13296
N16W13
M1.6 05/07 2323
No
No
N/A
Imagery not yet available
2023 05/09 2335
2023 05/10 1250
83
13296
N13W31
M4/1B 09/1858
Yes
Yes
N/A
Type II speed was reported as 1892 km/s from PHFF
2023 07/16 0635
2023 07/16 0735
18
N/A
farside event
N/A
No
No
N/A
Event appeared to be associated with farside activity
2023 07/18 0115
2023 07/18 0615
620
13363
S26W87
M5 07/18 0006
No
No
N/A
Long duration M5 event that began on the 17th

Please Note: Proton fluxes are integral 5-minute averages for energies >10 MeV, given in Particle Flux Units (pfu), measured by GOES spacecraft at Geosynchronous orbit: 1 pfu = 1 p cm-2 sr-1s-1. SESC defines the start of a proton event to be the first of 3 consecutive data points with fluxes greater than or equal to 10 pfu. The end of an event is the last time the flux was greater than or equal to 10 pfu. This definition, motivated by SWPC customer needs, allows multiple proton flares and/or interplanetary shock proton increases to occur within one SWPC proton event. Additional data may be necessary to more completely resolve any individual proton event.

Different detectors, onboard different GOES spacecraft, have taken the data since 1976. These proton data were processed using various algorithms. To date, no attempt has been made to cross-normalize the resulting proton fluxes.

Flare associations are given, although data about individual coronal mass ejections (CMEs), available from SOHO only since 1996, are necessary fully to characterize each event. The CME video loops in the "Imagery/Misc" column are maintained at the CDAW Data Center by NASA and The Catholic University of America in cooperation with the Naval Research Laboratory. SOHO is a project of international cooperation between ESA and NASA. CDAW Data Center. The hyperlinked flare maximum information is maintained by freeland@lmsal.com and is located at: https://www.lmsal.com/solarsoft/latest_events/

For more information on SEP events, contact Charles Carr or Rob Steenburgh of the NOAA Space weather Prediction Center.