Hi Mike, I completely agree that the currents do fluctuate in both width and position over time, as do all such energy lines. I think that Hamish did get a chance to dowse it farther east and it ran near St. Petersburg (can anyone verify that?). I know that Hugh Newman has also dowsed it in South America, where it runs through an island in Lake Titicaca.
Although the Google Maps placemark is very useful as a rough guide, it cannot be completely accurate as to where the M&M currents are running at any particular time, and there are some inaccuracies in placement on it. If people want the original maps as dowsed by Hamish Miller & Paul Broadhurst, they can still be purchased from Penwith Press
I have discovered that the Google placemark and paintings are the result of a project by artist Luke Piper, and he also includes a World Map of the Michael Line
on his website.