Hi Petra,

Sorry I didn't reply back soomer. I was out of town for the weekend.

Here is the web site. www.alpineequakes.blogspot.com

If manually typing it in doesn't work I'll try to paste it here for you. But, it was badly written. I was half asleep when I wrote it and I don't think it makes too much sense. Hopefully the linked graphics will help explain. I'll probably try to re-write it when I'm more mentally with it (which may be never - lol)