We can use a larger planet size for Fairy Tail now, so Deus Sema and Erza's speed changes as a result. The size of the planet is based on this.
(Object Size)*(Panel Height)/[(Object Height)*2tan(70/2 deg)]
Earth Diameter = 27243763.4 Meters = 74 px
Panel Height = 956 px
Distance Deus Sema Moved = (27243763.4)*(956)/[(74)*2tan(70/2 deg)] = 251325465.098 Meters
Velocity = (251325465.098 Meters)/(6 Seconds) = 41887577.5163 m/s
Due to the meteor entering the atmosphere, it's speed dropped to 70% of it's initial speed
Final Velocity = (41887577.5163 m/s)*(7/10) = 29321304.2614 m/s
Erza Height = 1.69 Meters = 15.14 px
1.69 Meters/15.14 px = 0.1116 Meters per px
Meteor Width = 229.60 px = 25.63 Meters
1/2 of Meteor Width = 12.815 Meters
1⁄2 of Meteor Length = 166.70 px = 18.61 Meters
Volume = (4⁄3)*(π)*(A)*(B^2)
Volume = (4⁄3)*(π)*(18.61)*(12.815^2) = 12801.83435 Meters^3
Mass = (Volume)*(Density)
Density of Meteors is 3350 Kg⁄Meters^3
Meteor Mass = (12801.83435 Meters^3)*(3350 Kg⁄Meters^3) = 42886145.09 Kg
KE = (0.5)*(Mass)*(Velocity^2)
KE = (0.5)*(42886145.09)*(29321304.2614^2) = 4.4 Teratons (Small Country level+)
Now for Erza's speed. We know that Erza swung her sword right before she hit the meteor, so we'll use the combined length of her arm and sword as the distance she was from the meteor before she swung her sword.
Erza's Arm = 0.7436 Meters = 186.88 px
0.7436 Meters/186.88 px = 0.003979 Meters per px
Erza's Fist = 39.91 px = 0.1588 Meters
Erza's Fist = 0.1588 Meters = 56.07 px
0.1588 Meters/56.07 px = 0.00283 Meters per px
Erza's Sword = 453.93 px = 1.2856 Meters
Add the sword length to her arm length
Erza's Sword+Arm = (1.2856 Meters)+(0.7436 Meters) = 2.0292 Meters
Velocity of Meteor = 29321304.2614 m/s
Timeframe = (2.0292 Meters)/(29321304.2614 m/s) = 6.92056527e-8 Seconds
Erza swings her arm in a 180 degree arc
Distance Erza's Arm Traveled = (π)*(2.0292 Meters) = 6.37492 Meters
Erza's Speed = (6.37492 Meters)/(6.92056527e-8 Seconds) = 92115596.7943 m/s or 31% SoL (Relativistic)