b'ADVERTISERS INDEXAEGC 2025. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27APOGCE 2024. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14, 26Bartington Instruments Ltd. . . . . . . . . . . . . . . . . . . . . . . . . .3CoRMaGEO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12DISCOVER 2024 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2, 44EMIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back coverExploring for the Future 2024. . . . . . . . . . . . . . . . . . . . . 17, 30CONTENTSGroundwater Imaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39Tensor Research. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11, 12Table of ASEG officeholders 2024-25Inside front coverASEG CORPORATE PLUS MEMBERSEditors desk3Velseis Pty Ltd T+61 7 3376 5544 E info@velseis.com W https://www.velseis.com/ ASEG newsTOTAL SEISMICPresidents piece4T+61 (0)409 891 391 E info@totalseismic.com Executive brief5W https://www.totalseismic.com/ New Members6Terrex SeismicCommittees International: An introduction to the new Chair7T+61 7 3621 0300 (HO) E info@terrexseismic.com W http://www.terrexseismic.com Young Professionals Network: An update7 Honours and Awards: To be announced at DISCOVERin Hobart, nominate an ASEG Member today!8Branch news9ASEG national calendar14ASEG CORPORATE MEMBERS NewsSantos LtdConference and eventsMAG23 and the happy prospect of MAG2415T+61 8 8116 5000 W https://www.santos.comGeophysics in the SurveysGA:News16Southern Geoscience Consultants Pty Ltd Update on geophysical surveys19T+61 8 6254 5000 E geophysics@sgc.com.auW http://sgc.com.au/ GSSA:New South Australian Bouguer gravity products Transparent Earth Geophysicsavailable now!22T+61 (0) 409 887 459 Wayne Hewison GSWA:WA Array seismic programmephase 123or +61 (0) 412 844 216 Andy Gabell WA-MT 20232425Einfo@transparentearth.com.au W http://www.transparentearth.com.auExploration Incentive Scheme petrophysicaldataacquisition20232425DUG Technology T+61 8 9287 4100 Esales@dug.com support@dug.comCommentaryW https://dug.com/ Education mattersBalancing the demand for broader interdisciplinarySeismic Asia Pacific Contact: Paul K Duncan educationwith the energy sector\'s need for specialised skills28T+61 7 3719 3412 E paulk.d@seismic.com.auEnvironmental geophysicsHydrogeophysics gets a shot in the arm31W https://www.seismicapac.com/Mineral geophysicsBigger isnt always Better and the Reverse Sombrero34HiSeis Pty LtdSeismic windowAPPEA becomes Australian Energy Producers (APA)35T+61 8 9470 9866 E admin@hiseis.com W http://www.hiseis.com.au/ Data trendsReading Guidelines for Drone Geophysics36SKYTEM WebwavesGreening the Society: Sailing towards a sustainableT+61 8 9249 8715 E sjo@skytem.comdigitalfootprint37W https://skytem.com/Planetary geophysicsFeaturesT+61 7 4638 9001A beginners guide to seismic sensors38Einfo@planetarygeophysics.com.au W https://www.planetarygeophysics.com/ Estimating Nth-order vertical gradients from Nth-order horizontal gradients45Crossword49International calendar of eventsInside back coverEditor ASEG Head Office & SecretariatLisa WorrallThe Association Specialists Pty Ltd (TAS) Eprevieweditor@aseg.org.au T(02) 9431 8622 Assistant Editor Esecretary@aseg.org.au FRONT COVER Thong HuynhW www.aseg.org.auABN 71 000 876 040ISSN 1443-2471 EThong.H.Huynh@outlook.com DesignerJUNE 2024ISSUE 230 Matt Grant (partly obscured)Stripe Design with his co-author\'s collectionAssociate Editorsof seismic nodes at a recentEducation:Marina PervukhinaEinfo@stripedesign.com.aumeeting of the QueenslandEcontinuingeducation@aseg.org.au PrinterBranch of the ASEG. See the article "A beginner\'s guide toGovernment:VacantCanPrintseismic sensors" in this issueET(02) 6295 4422for more information. Environmental geophysics:Mike HatchEcanprint@canprint.com.auNEWS AND COMMENTARY Emichael.hatch@adelaide.edu.auClaus Otto on balancing the demand for broader Advertisinginterdisciplinary education with the energy sectorsneed for specialised skysics gets a shot in the armillsHydrogeopht always Better and the Reverse SombreroTerry HarveyLisa WorrallBigger isn Minerals geophysics:FEATURESA beginners guide to seismic sensors radientsEstima th-order vonertalgtical gradients Eterry.v.harvey@glencore.com.au T0409 128 666from Nting Nth-order horizPetroleum geophysics:Michael MicenkoEPrevieweditor@aseg.org.auPreview is freely available online at Emicenko@bigpond.com Publisherhttps://www.aseg.org.au/publications/PVCurrent andGeophysical data management and analysis: Ejournals@tandf.com.au also https://www.tandfonline.com/toc/texp20/current TimKeepingW www.tandfonline.com Australian Society of Exploration Geophysicists 2024ETim.Keeping@sa.gov.auISSN: 1443-2471eISSN: 1836-084X'