Down the Quantum Rabbit Hole
If I were looking for high concentrations of dark/vacuum energy I would check those sinkholes in areas of high reflectivity. There you may find him before he decays & evaporates or possibly goes underground. The high radar reflectivity will be his condensing signature within the atmosphere.
Google Earth with 6-23-13 Reflectivity from NWS and 6 months of sinkholes.