On the Removal of MT Signals from SBL Data

When performing a seabed logging (SBL) survey during a period of high magnetotelluric (MT) activity, it is not uncommon for MT signals - due to their highly variable and nonstationary nature - to significantly reduce the quality of SBL data. In the most dramatic instances, this can create the need for retowing some SBL lines at a high additional cost. We propose and describe a simple method to partially remove MT signals that may be superimposed to SBL data acquired during periods of high MT activity, and subsequently illustrate the method's performance with a real data example.