Talk About Geophysics!  TAG Webinar Series

EEGS’ Monthly Educational Webinar Series

EEGS has developed a new educational webinar series exploring topics ranging from scientific presentations to a deeper dive into noted authors’ published articles. The webinar series is intended to offer an informal setting and an interactive opportunity to address diverse geophysical topics. Students will be pleased to see that some scheduled topics will focus on career paths, working with your advisor, etc. and small business owners will benefit from sessions ranging from business technical tools to client management.

If you have questions, email [email protected].  If you'd like to suggest a future TAG Topic or offer to host a webinar, please click here (a short, online feedback form for EEGS' TAG Webinar organizers).  

August Webinar Scheduled:  G2HE - Transforming Geophysical Parameters into Hydrogeological and Engineering Parameters and the Relevance of the Factors of Empiricism, Scalability, Resolution, Uncertainty, Clay and Experience

Be sure to mark your calendars for the next EEGS TAG Webinar scheduled for Aug 11, 2021 at 5:00 PM Mountain Time (US and Canada) 4:00 PM PT; 6:00 PM CT and 7:00 PM ET.

Then, register in advance by clicking this link:

After registering, you will receive a confirmation email containing information about joining the meeting.

Presentation Title:  G2HE - Transforming Geophysical Parameters into Hydrogeological and Engineering Parameters and the Relevance of the Factors of Empiricism, Scalability, Resolution, Uncertainty, Clay and Experience
Presenter:  Geoff Pettifer
Abstract:  This TAG Webinar is an update of a talk given at the 2015 Near-Surface Asia Pacific Conference in Hawaii and addresses the subject and the factors considered relevant to, the “Transformation of geophysical properties into Hydrogeological and Engineering Parameters” (G2HE), based on a lifetime career experience within the real-world constraints of commercial application of geophysics in the engineering, hydrogeological, environmental, mining and agriculture sectors and limited review of the literature and published case examples. The factors discussed, by no means a complete list, are Empiricism, Scalability, Resolution, Uncertainty, Clay and Experience.

Although we are constantly making improvements in geophysical modelling, inversion and use of innovations such as machine learning / AI, there is still much to be done in making geophysical measurements more accessible/relatable to and integrated with, the requisite site characterization and properties / parameters that are standardized in the geoscience and geo-engineering disciplines and sectors that utilize near-surface geophysics (groundwater, geotechnical, environmental, mining, agriculture etc.).

Conceptual and case examples are given to illustrate applications and limitations of the G2HE process. Recommendations are made for a suggested way forward to improve the practice and acceptance of Transformation of Geophysical properties into Hydrogeological and Engineering parameters including working to get wider inter-disciplinary engagement and acceptance of geophysical approaches, and a focus on fostering further collaborative inter-disciplinary research efforts with NSG end-users, professional societies and standards bodies.

Biography:  Geoff is a Technical Director – Hydrogeology and Geophysics in GHD, Perth, Australia, with over 50 years specialized experience in the practical application of geophysics to groundwater, geotechnical, mining, environmental, geological modelling, bore geophysical logging and condition assessment, resource assessment, salinity, and soil mapping projects in Government and the private sector, with a particular interest in promotion of greater use of near-surface geophysics in geoscience and geo-engineering.

He has additional varied experience and training in irrigation review and management, water resources, remote sensing, image processing, information management, GIS and database, flood mapping, asset management, catchment management and community engagement. Geoff also has extensive groundwater, salinity, major infrastructure and international development assistance project management experience.

His consulting interests include sustainable groundwater usage, sustainable irrigation, sustainable mining and mine development, land and marine geotechnical, environmental investigations and international development assistance and community / stakeholder engagement. Geoff has worked and consulted throughout Australia and overseas in Papua New Guinea, Indonesia, Malaysia, Bangladesh, China, Russia, Canada, US, Philippines and Africa.

July Webinar - Characterizing a Physical Model of a Collapsing Void Using a Trapdoor and Time-Lapse Surface-Wave Analysis

On July 14, Sarah Morton Rupert presented findings from a laboratory text box using a physical model designed to simulate void roof failure and migration to the ground surface to support the conceptual model that Vs variations can be an indicator of stress-field variations in the roof structure above a void and used to map the progression of a collapsing structure.  Questions and Ms. Morton Rupert's responses rounded out the well attended webinar.  Organizers and attendees thanked Ms. Morton Rupert for presenting her award-winning presentation with EEGS TAG Webinar participants.   

All TAG Webinars begin at 4:00 PT/ 5:00 MT/ 6:00 CT/ 7:00 ET and online registration is based on US time zone Mountain Time.

May Webinar - New Frontiers in Near Surface Geophysics: Muons, Cosmic Ray Neutron Probes, and Hyperspectral Imagery

On May 12, Leon DuPlessis, formerly with Freeport-McMoRan Inc., Trenton Franz, Univ. of Nebraska, and Isabel Barton, Univ. of Arizona presented three very interesting and informative talks and answered participants' questions.  Dr. DuPlessis spoke about Subsurface Density Mapping Using Muon Technology; Dr. Barton presented Mineral Mapping Using Drone-Based Hyperspectral Imaging;  and Dr. Franz summarized the Opportunities and Challenges Towards Integration of Hydrogeophysical Sensors in Agriculture.  TAG Webinar organizers expressed their appreciation to all three presenters for a very well received event.

April Webinar -  Proximal Soil Sensing: State of the Science

Dr. Craig Lobsey, senior lecturer in mechatronic engineering at the University of Southern Queensland, University of Southern Queensland presented his perspective on some of the key challenges in the application of sensor technology for soil management, recent developments and what may be on the horizon for proximal soil sensing technology.  Organizers extended many thanks to Dr. Lobsey for his talk as well as a robust question and answer session which followed.  

In March, we invited everyone to register for and attend SAGEEP 2021 held virtually March 14-19, 2021.

February Webinar - Meet Me Halfway

The EEGS Task Force Diversity, Equity and Inclusion (DEI) takes advantage of every opportunity to raise awareness and take a lead role in setting and achieving the highest standards of integrity, fairness, dignity and respect. Therefore, February's TAG webinar series featured a Task Force DEI webinar:  Meet Me Halfway, an interactive webinar exploring intergenerational communication in a geophysics workplace.  EEGS President Barry Allred commented: "Thanks to all the Task Force members for your efforts putting together the TAG webinar. It was excellent, well organized, and the discussions in the breakout rooms were very interesting and insightful.  I think everyone really enjoyed the interactive webinar format."

The webinar slide presentation is available for viewing by clicking here.

TAG Inaugural January Webinar a Success!

TAG's first webinar was held on January 13 and welcomed guest speaker, G. Didem Beskardes, the JEEG's 2019 Alan Witten Best Paper Award recipient.  By all measures - audience participation, attendee feedback and content quality - the TAG Webinar was successful and well received.  Dr. Beskardes discussed her findings from the study published in the JEEG paper "Power Density Distribution in Subsurface Fractures Due to an Energized Steel Well-casing Source" and conducted a lengthy and insightful Q&A session.