January 2010 - new version of WHAM that uses the Dipole1D code and the Google charts API.
WHAM is an online tool for 1D
controlled-source electromagnetic (CSEM) modeling. Just
specify a few parameters and with the click of a button, WHAM will output CSEM response plots in your browser window.
WHAM also provides links where you can download the raw CSEM response data files.
We hope that you will find WHAM to be a helpful tool for quick and easy CSEM modeling.
WHAM is built around
the open-source modeling code Dipole1D (Key, 2009).
WHAM currently supports modeling of the frequency domain EM fields produced by an electric dipole transmitter
located anywhere in a stack of 1D layers. WHAM computes the responses for the commonly collected inline transmitter
geometry and also the less commonly collected broadside and vertical transmitter orientations.
Receivers are located in a linear horizontal array that extends from the transmitter to
an user specified distance away. WHAM plots the CSEM responses of the non-zero components of the inline, crossline and vertical
electric and magnetic fields associated with each transmitter geometry.
Because single CSEM responses are difficult to interpret alone, WHAM allows you to specify two conductivity models so that their
respective CSEM responses can be easily compared. WHAM will also create amplitude and phase anomaly plots between
the two model responses.
You are free to use WHAM for your 1D CSEM modeling needs. However, we request that presentations using results from
WHAM include an acknowledgment to the "Marine EM Laboratory at Scripps Institution of Oceanography". If you publish results from WHAM
in a technical journal, please cite my paper on the Dipole1D modeling code, which is the numerical engine hidden behind WHAM's web interface: