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42 lines
1.4 KiB
ReStructuredText
42 lines
1.4 KiB
ReStructuredText
.. _examples_EM_FDEM_SusEffects:
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.. --------------------------------- ..
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.. ..
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.. THIS FILE IS AUTO GENEREATED ..
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.. ..
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.. SimPEG/Examples/__init__.py ..
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.. ..
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.. --------------------------------- ..
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EM: FDEM: Effects of susceptibility
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===================================
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When airborne freqeuncy domain EM (AFEM) survey is flown over
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the earth including significantly susceptible bodies (magnetite-rich rocks),
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negative data is often observed in the real part of the lowest frequency
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(e.g. Dighem system 900 Hz). This phenomenon mostly based upon magnetization
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occurs due to a susceptible body when the magnetic field is applied.
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To clarify what is happening in the earth when we are exciting the earth with
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a loop source in the frequency domain we run three forward modelling:
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- F[:math:`\sigma`, :math:`\mu`]: Anomalous conductivity and susceptibility
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- F[:math:`\sigma`, :math:`\mu_0`]: Anomalous conductivity
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- F[:math:`\sigma_{air}`, :math:`\mu_0`]: primary field
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We plot vector magnetic fields in the earth. For secondary fields we provide
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F[:math:`\sigma`, :math:`\mu`]-F[:math:`\sigma`, :math:`\mu_0`]. Following
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figure show both real and parts.
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.. plot::
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from SimPEG import Examples
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Examples.EM_FDEM_SusEffects.run()
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.. literalinclude:: ../../SimPEG/Examples/EM_FDEM_SusEffects.py
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:language: python
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:linenos:
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