[Roger Hunter]

(01-21-2017, 07:46 PM)Duffy Wrote: Events for 21st Jan

21st Jan M 5.2 New Britain Region, P.N.G. 01:52:30 ut ... 152' 21' E - 5' 13' S ...... CS 154' 42' E (18th Jan) .......................

21st Jan M 5.7 Halmahera, Indonesia 05:16:33 ut ... 128' 13' E - 2' 52' N ............. CS 103' 41' E (10th Jan) .......................
                     Transition of night to day at bearing 16' 23' W - 21' 33' S (12th Jan) occurred at ................. 05:17 ut 21 Jan

21st Jan M 5.0 Banda Sea 06:30:50 ut ... 130' 21' E - 6' 12' S ............................... CS  85' 07' E (18th Jan) ........................

21st Jan M 5.0 Kermadec Islands 17:53:32 ut ... 177' 37' W - 33' 03' S ..............................................................................
                     Sunrise at bearing 175' 50' E - 21' 07' S (15th Jan) occurred at .......................................... 17:54 ut 21st Jan


Duffy

Ok, found the bug. Quakes were being counted multiple times.

I used all quakes mag 5+ for 2016 as the data set. there were 1686 of them and 145 were mag 6+

I used the 6+ quakes as main quakes. The longitude of each one was the center point and the longitudes which were 90 degrees either direction were used as sunrise/sunset locations. 

Then all small quakes were examined, looking for quakes within a given distance from either sunrise or sunset longitudes.

Using the band with of +/- 0.5 degrees it found 8 of the main quakes having 9 such quakes between them.

Using a +/- 1 degree width there were 23 quakes within 17 of the main quakes. 

So what does it all mean?

Nothing, Just chance, of no predictive value.

Roger