Donald, click on the graphs and you get another display of the graphs with text explaining what is being measured. The second and third graphs are measuring different things (each graph is measuring a different thing). Only the last, Kp, is measured at the ground, the others are measured at geosynchronous satellites-the explanation gives the longitude that they remain above. Some of the variation has to do with whether the satellite is above the day side of the earth or the night side. So, some of what you are correlating is whether it is daytime or nighttime. So, you should be able to correlate about half of all earthquakes to daily cycles in the curves. In other words, meaningless. A complete waste of time to do this without knowing what you are correlating. I'm being a bit harsh because I've said some of this before and you ignored it. Chris