[Roger Hunter]

(03-11-2017, 05:46 PM)Duffy Wrote: Roger 

OK I understand now, we have a 90 degree distance from the co-ordinates in Chile and 196 quakes of 5+ have occurred at that distance since 1973.  Do you have anyway of determining if sunrise/sunset was on this bearing at the time these quakes occurred.  The point I was making with Chile was the number of quakes in January gone, had a higher correlation of sunrise/sunset times than any other month over the past year.  It gives no relation to a very active region because the count would be more or less, up or down all year ... it is not !


Duffy

Duffy;

No, I haven't found a way to convert RA/dec to Lat/Lon.

However, you have lat,lon and UTC so it shoud be possible to compute local time and get an approximate sunup/down idea from that.

 
Roger