[Wacka]

Go to this site (Phil Plait's Bad Astronomy):

http://www.badastronomy.com/bad/misc/planets.html

It has a chart of the gravitational effect of the moon and the planets on the earth.

Moon = 1

Jupiter = .01

Venus = .006

Saturn = .0007

Mars = .0002

Three planets have more effect on the earth than Mars.

Mars pull is .02% (two one-hundreths of one percent) than that of the moon.

In other words, the moons pull is 5000 times stronger and the tide produced by Mars is one millionth that of the moon.

[UCANSEE2]

Thank you for the link to that site. I will find this very helpful.

I concede that the Gravitational pull of Mars is not what is causing the bottom of the lake to rise. At least not by itself. Also it may not be gravity that causes the increase of volcanic activity.