Hi, Therion does not use WMM at all (as it doesn't contain 20th century historical data). It uses IGRF model (https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html) which hasn't been updated yet. Best regards Martin On Thu, Apr 11, 2019 at 5:05 PM kevin dixon via Therion <therion@speleo.sk> wrote:
The last Therion release 5.4.3 is dated 01 Feb 2019.
There has in recent years been a significant change of the Magnetic North Pole location, less so for the Geomagnetic South Pole: https://ngdc.noaa.gov/geomag/GeomagneticPoles.shtml
Given the above, an out of cycle World Geomagnetic Model WMM2015v2 was released 04 Feb 2019.
When will this update appear in Survex and Therion ?
Thanks,
Kevin Dixon _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion