Final results for quakes of any size:

402 windows in each case.

9-10 deg. band 213 quakes 146 hit windows 36.3%

19-20 deg band 144 quakes 99 hit windows 24.6%

34-36 deg band 2865 quakes 399 hit windows 99.2%

58-61 deg band 397 quakes 223 hit windows 55.5%

71-72 deg band 1364 quakes 338 hit windows 84.1%

103-107 deg band 13992 quakes 401 hit windows 99.8%

142-146 deg band 7301 quakes 401 hit windows 99.8%

170-180 deg band 167 quakes 119 hit windows 29.6%

As you can see, probability depends on seismicity, not area of the band.

Roger