b'Conferences and eventsNewssystems. The SPM material that produces this effect was describedKP showed an example of using AEM for local scale aquifer as a cation deficient material partway between magnetitemapping in the Alice Springs area. His subsurface mapping has and maghemite, a product of tropical weathering of iron-richchanged the conceptual models around recharge in the area.basement rocks. One approach to dealing with these effects showed that incorporating three new variables in Ohms law, usingAndrew McPherson, (Geoscience Australia): Characterising the Cole-Cole model and inverting for them in conjunction withhydrogeology in the northern Surat Basin through integration of conductivity (developed by AarhusInv). The second approach wasmulti-disciplinary geoscience data setsstripping and reconstructing the AEM data and then modelling it with a thin sheet (developed by Macnae 2016).Nadege Rollet, (Geoscience Australia)Andrew talked about the Great Artesian Basin work and showed some great examples of integrating seismic interpretation and chronostratigraphy with AEM models. He highlighted areas where the conductivity was more informative than the layering picked in the shallow seismic data.Nadege introduced GAs talks on AEM interpretation and presented the concept of scale reduction, going from continental,Neil Symington (Geoscience Australia): Probabilistic workflows regional structures to very local features, all the way through tofor AEM interpretationdetermining the uncertainty of thickness in potential aquifers.Sebastian Wong, (Geoscience Australia): Overview from national to local, interpretation of the AusAEMNeil took us through a process of investigating the existence of specific features such as pinch-outs through a probabilistic inversion of AEM data and posterior quantiles of conductivity.Seb presented on the mapping of the top few hundred metersGianluca Fiandaca (University of Milan): Induced polarization in of the subsurface from phase one of the AusAEM surveyairborne EM; friend or foe? The hydrological perspectivecomprising some 200 000 sounding locations. He was also assisted in this endeavour by at least one child who shares his calendar.Kok Piang Tan (Geoscience Australia): AEM linking to Hydrogeological data in the Alice Springs areaGianluca not only pulled an all-nighter in a cubicle of the University of Milan, but he also stayed awake and actively involved himself in the discussions. He explored the possibility of extracting hydraulic parameters from the AEM conductivity models. His work follows from some previously successful OCTOBER 2021 PREVIEW 30'