www.ngdc.noaa.gov

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
1986
05/04 1835
1986
05/04 1930
16
N/A
N/A
N/A
N/A
N/A
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
10/12 0920
1988
10/12 0930
12
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1988
11/08 2225
1988
11/09 0810
13
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1988
11/14 0130
1988
11/14 0310
13
N/A
N/A
N/A
N/A
N/A
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
01/04 2305
1989
01/05 0130
28
N/A
N/A
N/A
N/A
N/A
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
05/05 0905
1989
05/05 1000
27
N/A
N/A
N/A
N/A
N/A
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
05/23 1135
1989
05/23 1358
68
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1989
05/24 0730
1989
05/24 0905
15
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1989
06/18 1650
1989
06/18 1910
18
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1989
06/30 0655
1989
06/30 0710
17
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1989
07/01 0655
1989
07/01 0720
17
N/A
N/A
N/A
N/A
N/A
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
10/06 0500
1989
10/06 0825
22
N/A
N/A
N/A
N/A
N/A
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
03/29 2120
1991
03/30 0330
20
N/A
N/A
N/A
N/A
N/A
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
01/20 0800
2022
01/20 1015
22
12929
N08W84
M5/Sf 01/20 0601
Yes
Yes
1431 km/s
Flux Plot
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 data
C2 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
C2 X-Ray
2023
05/08 1240
2023
05/09 0150
38
13296
N16W13
M1.6 05/07 2323
No
No
1075 km/s
C2 X-Ray
2023
05/09 2335
2023
05/10 1250
83
13296
N13W31
M4/1B 09/1858
Yes
Yes
1209 km/s
C2 X-Ray
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
1385 km/s
C2 X-Ray
2023
07/29 0020
2023
07/29 0920
154
13376
N27W87
M4 07/28 1558
Yes
No
1896 km/s
C2 X-Ray
2023
08/05 1115
2023
08/05 1745
18
13386
N10W63
M1 08/05 0718
Yes
No
N/A
There was an additonal enhancement to this event following an X1 from 3386
2023
08/08 0115
2023
08/09 0025
47
13386
Beyond west limb
X1 08/07 2046
Yes
No
1851 km/s
C2 X-Ray
2023
09/01 0430
2023
09/01 0610
25
13413
N09W75
M1 09/01 0351
Yes
Yes
1339 km/s
C2 X-Ray
DST
2023
12/15 2345
2023
12/16 0015
13
13514
N05W76
N/A
Yes
Yes
N/A
Combination of flare activity from region 3514 and secondary CME enhancements
2024
01/03 2005
2024
01/04 0835
20
13536
N04E73
X5/3B 12/31 2203
Yes
Yes
N/A
C2 X-Ray
DST
2024
01/29 0615
2024
01/29 1805
137
13559
N26E73
M6.7/Sf 01/29 0438
Yes
No
N/A
C2 Wind Waves
2024
02/09 1530
2024
02/09 2355
187
13575
Beyond SW limb
X3.3 02/09 1314
Yes
Yes
N/A
N/A
2024
02/12 0805
2024
02/13 1605
118
13576
S16W30
C9.6/Sf 02/12 0554
No
Yes
N/A
N/A
2024
03/23 0815
2024
03/23 1820
956
13614
N27E08
X1.1/2F 03/23 0133
Yes
No
N/A
Assymetric halo
a>
Flux Plot
2024
05/10 1335
2024
05/10 1745
208
13664
S17W36
X3.9 05/10 0654
Yes
Yes
N/A
N/A
2024
05/11 0210
2024
05/11 0910
116
13664
S17W44
X5.8 05/11 0123
Yes
Yes
N/A
This event followed shortly after the previous had fallen below 10pfu
2024
06/08 0255
2024
06/08 0800
1030
13696
S17W58
M9.7 06/08 0149
Yes
Yes
N/A
N/A
a>
Flux Plot
2024
07/23 0300
2024
07/23 1040
24
N/A
Farsided event
N/A
No
No
N/A
Flux Plot
2024
09/09 1640
2024
09/09 2250
34
13806
S08W81
M1.0 09/09 0332
Yes
No
N/A
Flux Plot
2024
09/17 0735
2024
09/17 1050
33
13825
S16E56
X4.5/2b 09/14 1529
Yes
Yes
N/A
Flux Plot
2024
10/09 0505
2024
10/10 1515
1810
13848
N12W11
X1.8 10/09 0156
Yes
Yes
N/A
Flux Plot
2024
10/26 1910
2024
10/28 0350
364
13873
S11E56
X1.8 10/26 0719
Yes
Yes
N/A
Flux Plot
2024
11/21 1925
2024
11/22 0355
125
N/A
Beyond W Limb
N/A
No
No
1436 km/s
Flux Plot
2025
01/04 2235
2025
01/25 0055
20
13939
S17W61
C7.6 01/04 1915
No
No
N/A
Flux Plot
2025
02/25 0020
2025
02/25 0240
37
N/A
Around SW Limb
M3.9 02/24 2302
Yes
Yes
N/A
Flux Plot
2025
03/31 1105
2025
04/01 0425
147
14046
N05E85
X1.9 03/28 1521
No
Yes
N/A
Flux Plot
2025
05/31 1710
2025
06/01 0915
666
14100
N08W00
M8.1 05/31 0005
Yes
Yes
N/A
Flux Plot
2025
08/25 1355
2025
08/27 0740
13
N/A
farside halo
N/A
No
No
N/A
Flux Plot
2025
11/10 1125
2025
11/10 1500
30
14274
N24W14
X1.2/2B 11/10 0919
Yes
Yes
N/A
Flux Plot
2025
11/11 0945
2025
11/12 0215
1460
14274
N24W28
X5.1/3B 11/11 1004
Yes
Yes
N/A
Flux Plot
2025
11/14 0920
2025
11/14 0950
16
14274
N22W61
X4.0/3B 11/14 0830
Yes
Yes
N/A
Flux Plot
2026
01/18 2255
2026
01/19 1915
37,000
14341
S11E24
X1.9/3B 01/18 1809
1809
Yes
Yes
ESP enhanced at CME arrival
Flux Plot
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. The hyperlinked flare maximum information is maintained by
freeland@lmsal.com
and is located at
Solarsoft
The links labeled "Flux Plot" are maintained by The University of Colorado Boulder and Space Weather Technology, Research, and Education Center, SWx TREC Space Weather Data Portal, Laboratory for Atmospheric and Space Physics, and are located here:
SWx TREC
For more information on SEP events, contact
Charles Carr
or
Rob Steenburgh
of the
NOAA Space weather Prediction
Center