Hi all;

To answer John's question I extracted all mag 8+ quakes from the
biggest database I have from NEIC. Then I computed the Sun-Moon
angle and counted them into an array.

The table below shows the count by degrees and a chi-square
calculation done by grouping into 30 degree segments.

Accepted 70  quakes, mag. 8.0+
Sun-Moon angle distribution
  0:     0   1   0   0   0   0   0   0   0   0
 10:     0   0   0   0   1   0   0   0   0   0
 20:     0   0   1   1   0   1   0   0   0   1      6   5.83    .00
 30:     0   0   1   0   0   0   0   0   0   0
 40:     0   1   0   0   0   0   0   0   0   0
 50:     1   0   0   1   0   0   0   0   1   0      5   5.83    .12
 60:     0   0   0   0   1   1   1   0   0   1
 70:     0   1   0   0   1   0   0   0   0   0
 80:     1   0   0   0   0   1   0   0   0   0      8   5.83    .80
 90:     1   1   0   0   0   1   1   0   0   0
 100:    0   0   1   0   0   0   0   0   0   0
 110:    0   0   0   0   0   1   0   1   0   0      7   5.83    .23
 120:    0   0   0   0   0   0   0   0   0   0
 130:    0   0   0   0   0   0   0   1   0   0
 140:    0   0   0   1   0   0   0   0   0   0      2   5.83   2.52
 150:    0   0   0   0   0   0   0   1   0   0
 160:    0   0   0   0   0   0   0   0   0   0
 170:    0   0   0   0   0   0   0   0   0   0      1   5.83   4.00
 180:    1   0   0   0   0   0   0   0   0   0
 190:    0   1   0   0   0   0   0   0   0   0
 200:    0   0   0   0   0   1   1   0   0   0      4   5.83    .58
 210:    0   2   0   0   1   0   0   0   1   0
 220:    1   0   0   0   0   0   0   0   0   1
 230:    0   0   0   1   0   0   0   1   0   1      9   5.83   1.72
 240:    0   0   0   0   0   0   0   0   0   0
 250:    0   0   0   0   1   2   1   0   0   0
 260:    0   0   0   0   1   1   0   0   0   0      6   5.83    .00
 270:    0   0   0   0   0   1   0   0   1   0
 280:    0   0   0   0   0   1   0   0   0   0
 290:    0   0   1   0   0   0   0   0   0   0      4   5.83    .58
 300:    1   0   0   0   0   0   0   0   0   0
 310:    0   1   1   1   0   0   0   0   1   0
 320:    0   1   0   0   1   0   0   0   0   1      8   5.83    .80
 330:    1   0   1   0   0   0   1   0   0   0
 340:    0   1   0   1   0   1   0   0   0   1
 350:    0   1   0   0   0   0   1   1   0   0     10   5.83   2.98
   Chi-square =   14.34 with 11 degrees of freedom, significance
   level about 20%

The results are not significant enough to support the theory.

Roger