@inproceedings{inproceedings, title = {{Operation of U.S. Geological Survey unmanned digital magnetic observatories}}, publisher = {{Elsevier BV}}, url = {{https://doi.org/10.1016/0031-9201(90)90207-e }}, year = {{1990}}, month = {{1}}, author = {{Wilson LR}}, doi = {{10.1016/0031-9201(90)90207-e}}, volume = {{59}}, journal = {{Physics of the Earth and Planetary Interiors}}, issue = {{1-2}}, pages = {{45-54}}, note = {{Accessed on 2025/11/26}}}