<div dir="ltr"><div dir="ltr">Hi,<div><br></div><div>Therion does not use WMM at all (as it doesn't contain 20th century historical data).</div><div>It uses IGRF model (<a href="https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html">https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html</a>) which hasn't been updated yet.</div><div><br></div><div>Best regards</div><div>Martin</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 11, 2019 at 5:05 PM kevin dixon via Therion <<a href="mailto:therion@speleo.sk">therion@speleo.sk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div>The last Therion release 5.4.3 is dated 01 Feb 2019.<br><br></div>There has in recent years been a significant change of the Magnetic North Pole location, less so for the Geomagnetic South Pole:<br><a href="https://ngdc.noaa.gov/geomag/GeomagneticPoles.shtml" target="_blank">https://ngdc.noaa.gov/geomag/GeomagneticPoles.shtml</a></div><div dir="ltr"><br></div><div>Given the above, an out of cycle World Geomagnetic Model WMM2015v2 was released 04 Feb 2019.</div><div><br></div><div>When will this update appear in Survex and Therion ?</div><div><br></div><div>Thanks,</div><div><br></div><div>Kevin Dixon<br></div></div>
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