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Table 2 List of X-ray solar flares of more than M5.0 and estimated shock speed and maximum solar wind speed

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

Day

Start

X-ray

V sh (second SSC) (km/s)

V max (second SSC) (km/s)

V max (second SSC) (km/s)

Cliver et al. 1990

Belov et al. 2008

10

1848E

X4.5

680

490

547–600

11

0829E

M9.7

880

640

645–710

11

1535E

X1.2

1040

760

724–798

11

1933E

X1.3

1150

850

778–859

12

0016E

M7.3

1320

980

906–952