This is part of an interesting site, which I have not investigated thoroughly. Perhaps a look here would be worthwhile. http://www.geolab.nrcan.gc.ca/geomag/e_digdat.html best wishes, Nick VE7DXR -- FAQ on WWW: http://www.contesting.com/topband.html Submissions: topband@contesting.com Administrative requests: topband-REQUEST@contesting.com Problems: owner-topband@contesting.com