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Table 1 List of optical and X-ray solar flares with X-ray intensities of more than M5.0

From: Estimating the solar wind conditions during an extreme geomagnetic storm: a case study of the event that occurred on March 13–14, 1989

Date

Start

Max

End

Lat.

CMD

Opt

X-ray

NOAA#

CME

Radio burst

3/10

1848E

1912U

2158

N31

E22

3B

X4.5

5395

Yes

Type II, IV

3/11

0829E

0905

0944D

N29

E16

2B

M9.7

5395

  

3/11

1535E

1538

1601D

N28

E13

2B

X1.2

5395

  

3/11

1933E

1940

2016D

N27

E10

2B

X1.3

5395

Yes

 

3/12

0016E

0029

0043D

N28

E09

2B

M7.3

5395

 

Type IV