| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Earth current | Aerospace | A large-scale surge of electric charge within the earth's crust, associated with a disturbance of the ionosphere. Current patterns of quasi-circular form and extending over areas the size of whole continents have been identified and are known to be closely related to solar-induced variations in the extreme upper atmosphere. (references) | |
| Earth current | Mining | A light electric current apparently traversing the Earth's surface but that in reality exists in a wire grounded at both ends, due to small potential differences between the two points at which the wire is grounded. Syn: telluric current. (references) | |
| Natural Earth current | Mining | Electric current in the Earth not due to human activity. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
