Geophysical Mapping: Problem Details 15 of 39 Problem Name: Fractures Problem Type: Groundwater Assigned Methods: + Acoustic logging Borehole Methods + BEAM G4 SCAN Electrical Methods + Borehole imaging, Structure logging Borehole Methods + Electrical and induction logging Borehole Methods + Fluid logging, Flow meter Borehole Methods + Frequency-domain electromagnetics - Profiling Electromagnetic Methods + Frequency-domain electromagnetics - Sounding Electromagnetic Methods + Geoelectrics - Crosshole tomography Electrical Methods + Geoelectrics - Tomography (surface based) Electrical Methods + Ground penetrating radar (surface-based) Electromagnetic Methods + Ground penetrating radar - Borehole tomography Electromagnetic Methods + Seismic crosshole tomography Seismic Techniques + Shallow Water Seismics - Lake Seismics Seismic Techniques + Shallow reflection seismics Seismic Techniques + Shear-wave reflection seismics Seismic Techniques + Surface Nuclear Magnetic Resonance (SNMR) Radioactivity + Tunnel infrared thermography Thermic Methods + VLF / VLF-R, Radiomagnetotellurics Electromagnetic Methods + Vertical seismic profiling (VSP) Seismic Techniques + Very-high resolution reflection seismics Seismic Techniques 0 DC geoelectrics - Profiling Electrical Methods 0 Ground spectrometry Radioactivity 0 Passive seismic monitoring Seismic Techniques 0 Refraction seismic tomography (surface-based) Seismic Techniques 0 Seismic surface waves methods Seismic Techniques 0 Technical logging Borehole Methods 0 Time-domain electromagnetics - Profiling Electromagnetic Methods 0 Time-domain electromagnetics - Sounding Electromagnetic Methods    '+' = Technique applicable; '0' = Application possible/limited use