Roger
As you have stated that odds of having 6+ quakes is 0.6 ,in window period of + or - one day.
Now here are some facts
If I take period from 1-1- 2000 to 31-12 2015 ie 16 years ie 1946 windows of 3 days
Now as per USGS
1) 6 and 6+ quakes in 16 years are 2544
2)6.1+.... Quakes are 1975
3)6.2+..............1537
4)6.3+......... 1230
5)6.4+.......966
6)6.5+..........779
Thus odds are quakes/windows are
1.3, 1.01, 0.789 ,0.632, 0.496 , 0.410
Now , as per this ,there will alwaysbe a 6 or 6 .1+ quake in 3 day window . Which never happens
The problem with this stats is it does not take in to account clusters of quakes.
On a prone date there will be several 6+ quakes in one window ,
I think ,correct picture will be arrived if we take one quake in window ,even though there are several.
Amit
As you have stated that odds of having 6+ quakes is 0.6 ,in window period of + or - one day.
Now here are some facts
If I take period from 1-1- 2000 to 31-12 2015 ie 16 years ie 1946 windows of 3 days
Now as per USGS
1) 6 and 6+ quakes in 16 years are 2544
2)6.1+.... Quakes are 1975
3)6.2+..............1537
4)6.3+......... 1230
5)6.4+.......966
6)6.5+..........779
Thus odds are quakes/windows are
1.3, 1.01, 0.789 ,0.632, 0.496 , 0.410
Now , as per this ,there will alwaysbe a 6 or 6 .1+ quake in 3 day window . Which never happens
The problem with this stats is it does not take in to account clusters of quakes.
On a prone date there will be several 6+ quakes in one window ,
I think ,correct picture will be arrived if we take one quake in window ,even though there are several.
Amit