If you go about half way down that 90-03.html Web page you will find a drawing which has the sun on the right and the Earth on the left surrounded by black globes. The globes represent the position of the moon relative to the sun when the 17 most recent powerful earthquakes had occurred when the drawing was made. And the two paragraphs following the drawing state:

“Those 17 high magnitude earthquakes occurred when the differences between the longitude lines which the sun and the moon were directly above at those times were the following: 40E, 25E, 12E, 10E, 9E, 4E, 19W, 27W, 33W, 35W and 89W, 126W, 161E, 120E, 118E, 94E, 79E. In each case the moon longitude was that many degrees to the east or west of the sun longitude.

“10 of those 17 earthquakes, roughly 60%, occurred when those longitude differences were between 40 degrees east (the moon was to the east of the sun in the sky) and 35 degrees west (the moon was to the west of the sun in the sky). That 75 degrees represents only about 20% of the total possible longitude difference range of 360 degrees. The probability of that happening by chance is fairly low. And that suggests that very powerful earthquakes are usually being triggered by some force or phenomenon which has a maximum value around the time when the sun and moon are close to one another in the sky. The data in the main chart show that any of a number of forces or phenomena might have been the most important one for a given earthquake.”

As it says, 60% of the earthquakes occurred within 20% of the longitude range. That looks like a pretty impressive statistic to me!

If I updated that drawing with the latest very powerful earthquakes it would provide even stronger evidence of that preferential triggering. For example, that extremely powerful September 25, 2003 earthquake in Japan occurred when the sun and moon were just 5 degrees apart in the sky.