Suppose object X is hidden somewhere on Earth and can, somehow, produce "weak" gravitational waves, that do not cause anything perceivable by people, but can be detected by all gravitational wave sensors on Earth. (I understand it's impossible due to mass issues, but just suppose it happened by a currently unknown phenomena, a detectable gravitational wave was produced on Earth by some not yet developed technology, despite being currently impossible for us.)
QUESTION: Would it be possible to triangulate the location of object X, by analysis of the gravitational waves it produced?
If yes, could you give me a brief description of how it would be done? If not, why not? What would be needed to triangulate this position?
This would be for a short story. It has an impossible element (the wave being produced on Earth), but the reaction to the situation has to be plausible. Thank you for helping. :)