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The Council for Geoscience (CGS) can confirm that an earthquake occurred in the West of Johannesburg on Friday, 1 March, 2019 at 06:56am South African Standard Time. The earthquake registered a preliminary 3.8 on the local magnitude scale as recorded by the South African Seismograph Network. Although the tremors could be felt around the greater Johannesburg area, this seismic disturbance has been located by our seismic stations to have occurred near the Harmony Doornkop mining area in the West Rand.
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The Council for Geoscience (CGS) joins the geoscience community in mourning the passing of Professor Marian Tredoux, Associate Professor of the Department of Geology at the University of the Free State. Prof. Tredoux was a devoted geoscientist who had an exceptional career spanning over 30 years. The geological community recently bestowed the highest honour of naming a mineral after her. The mineral, which contains nickel, antimony and oxygen, was named “tredouxite” in acknowledgement of her immense contribution to the body of knowledge in the field of the geosciences. The CGS joins the geoscience community in expressing its heartfelt condolences to Prof. Tredoux’s family, her students, the university, her colleagues and the geoscience community at large. Prof. Tredoux’s passion and dedication to her work will be sorely missed by those whose lives she impacted.

For further information, please contact Mahlatse Mononela: telephone: +27(0)12 841 1225; email: This email address is being protected from spambots. You need JavaScript enabled to view it.

A little over a month ago, the Council for Geoscience (CGS) temporarily closed its laboratories due to concerns around its compromised air quality.
Since the closure of the laboratories, we have been taking precautionary measures to ensure the integrity of all our laboratories while also prioritising the health and safety of our employees. To date, we have instituted an internal investigation that seeks to identify the root cause attributable to the temporary closure.
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