Why are solar tides every 12 hours, not 6 hours?

[The legend]

If the moon didn't exist, would the Earth still have tides?

Well, yes of course. Due to the sun.

But what stumps me is how often would those be... I thought every 6hrs...because that's the time the sun's max gravity effect is in the other quarter of the earth...

 

[MagnetDave]

Any tidal effect will have two maxima. The Earth revolves about it's axis once per day, therefore each point processing through each maxima once per day - two high tides a day.

 

[The legend]

oh, ok... thank you!

 

[granpa]

http://volkov.oce.orst.edu/tides/

[URL]http://volkov.oce.orst.edu/tides/pic/tpxo7.2.gif[/URL]