The International Geomagnetic Reference Field (IGRF) computation using Oasis montaj software

The International Geomagnetic Reference Field (IGRF) is a mathematical model that describes Earth's magnetic field and its variations over time. IGRF seeks to provide a standardized framework for representing and predicting the behaviour of the geomagnetic field at any location on Earth's surface and at different latitudes. The IGRF model is based on a combination of observations and mathematical calculations and is continuously updated to account for the ever-changing Earth's magnetic field.
The application of the IGRF model is used in geophysics, geology, and other Earth sciences to analyse and interpret magnetic datasets to allow for the separation the regional magnetic field components from the local anomalies caused by geological structures or mineral deposits.
Oasis montaj software provides several algorithms to facilitate this process effectively. The software integrates the latest IGRF coefficients to ensure that accurate modelling of the Earth's magnetic field variations is properly accounted for. By selecting the appropriate IGRF model and specifying the geographic location, elevation, and time period, Oasis montaj calculates the expected magnetic field values based on the IGRF model parameters.
By subtracting the IGRF components from the observed magnetic field data, one can isolate the local magnetic field anomalies associated with geological structures or mineral deposit, enabling in the interpretation and mapping of subsurface geological features.

[@omonikeokunola2396]

Weldone doc

[@judeejepu]

Thank you

[@darlingtonogonna9539]

Hello Dr. thank you for your educative videos. Please can you make another covering the filters under the "Grid and Image" tool, like the 3x3 convolution, 5x5 symmetric convolution, 7x7 symmetric convolution, 9x9 symmetric convolution, vertical derivative convolution and more. I seriously need to learn how to use those filters. Thank you once again...

[@Justpedrolee]

I love this sir😩❤️

[@eigrfa]

Please how did you get the grids

[@mohammedawawu2673]

Sir mine is not creating a new project wen I save it will just take me back to my desktop background

[@lizqc2316]

Hello dear Jude Ejepu, thank you for your excellent video, I have a question, I want to calculate the IGRF value for a date this year 2023, but when I do the procedure for my data I get an error. What could I do in this case? Could it be because The old version of oasis geosoft that I have downloaded? Thank you very much in advance for your response ✨

[@judeejepu]

Thanks so much for your kind words. Which version of oasis montaj are you using?

[@lizqc2316]

thank you very much. I have version 8.4, I use the program in a virtual machine, since I could not install the program on my laptop

[@judeejepu]

@@lizqc2316I guess that may be the issue or the installation wasn't good enough

[@viniciusantunes2161]

It is very likely that since the version 8.4 is before 2023 Oasis Montaj does not have in their database the IGRF 2023 model. You can see in the NOAA website what is the value for your area and add in your gdb as a constant.

[@justusikeh2692]

Weldone Sir. Plz, if you don't mind, I need your email to have a private discussion with you.

[@judeejepu]

Welcome. Please send email to jude ejepu @ gmail.com