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Electromagnetic methods in geophysics - open educational resources.
Hi, I was using the app TDEM_Planewave_Wholespace.ipynb to explore the peak time. I set conductivity to 1 S/m. And adjust the time to see when the peak reaches the depth...
Is there an app for horizontal magnetic dipole in time domain (or frequency domain)? I was trying to reproduce the propagation of current in time, as shown in the following...
I am getting confused by the terminology regarding 'real' and 'imaginary' components of the electrical (or magnetic) field. For plane waves in a homogeneous halfspace, the electrical field can be...
The equations 8-11 for Ex and Hy field when it comes to plane waves on this webpage (https://em.geosci.xyz/content/maxwell1_fundamentals/harmonic_planewaves_homogeneous/derivation.html) seem to have exp(i \omega t) missing. Please double check.
On this webpage (https://em.geosci.xyz/content/maxwell3_fdem/circuitmodel_for_eminduction/understanding_harmonicEMresponse.html), the mutual inductance M_12 is derived using Biot-Savart law. But the equation for A_1 is not quite right, because A_1 should be inversely proportional to the...
The response function can be written as \frac{\alpha^2 + i \alpha}{1+\alpha^2}. The phase lag is $\phi/2 + tan^{-1}(\alpha)$. Therefore, if \alpha is very small, say, 1e-4 (for example, in the...
The following screenshot was taken from this webpage (https://em.geosci.xyz/content/maxwell3_fdem/circuitmodel_for_eminduction/index.html). First of all, for the equation on the third line, a minus sign is missing in front of the 'iw'. Secondly,...
The image description for this image is missing https://em.geosci.xyz/content/case_histories/westplains/index.html 
We are inconsistent with the use of the word pseudosection and if there should be a dash in the middle. I believe `pseudosection` is what we should be sticking with,...