Geophysical Mapping: Problem Findings Displays the valid Assignments. To display specific method information, click on the method name.  Problemtype  Problem  Assigner  Method  Methodtype   Natural Hazards   Earthquakes / paleoseismology   +   Ground penetrating radar (surface-based)   Electromagnetic Methods       +   Ground penetrating radar - Borehole tomography   Electromagnetic Methods       +   Passive seismic monitoring   Seismic Techniques       +   Seismic noise measurements   Seismic Techniques       +   Shallow Water Seismics - Lake Seismics   Seismic Techniques       +   Vertical seismic profiling (VSP)   Seismic Techniques       0   Borehole imaging, Structure logging   Borehole Methods       0   Refraction seismic tomography (surface-based)   Seismic Techniques       0   Seismic crosshole tomography   Seismic Techniques       0   Shallow reflection seismics   Seismic Techniques       0   Standard refraction seismics   Seismic Techniques       0   Very-high resolution reflection seismics   Seismic Techniques Search Again         Applicable Techniques