"感应电磁勘探法" can be translated into English as "induced electromagnetic prospecting method" or "induced electromagnetic exploration method".
Both translations are commonly used in the field of geophysics and mining exploration to refer to this specific technique. The choice between "prospecting" and "exploration" may depend on the context, with "prospecting" often being used in the context of searching for mineral deposits, while "exploration" has a broader application in various fields of geophysical investigation.