The National Oceanic and Atmospheric Administration (United States) has a web site (http://www.esrl.noaa.gov/gmd/grad/solcalc/) that pinpoints the major daily solar event times for a particular location using pinpoint maps. The solar event times are generally different from SunCalc's by one minute (later).
I follow another web site -- http://www.sunrisesunsetmap.com/ -- whose times match NOAA's times.
My URI for the SunCalc site is: http://www.suncalc.net/#/44.8608,-93.3887,16/2013.08.06/07:25
Can you explain the differences in times?
Thank you.