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.
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Brane Inflation Oxidizing and Ionizing our Children Microwaving Ourselves Ionizing and Oxidizing Wildlife Ionizing and Oxidizing Our Trees Electrocuting Marine Life Oxidizing Our Coral Reefs Blowing Up Oklahoma Dark What? You know, it makes up 95% Branespouts…OMG! The vacuum is unstable! Cancer LENR
Dark Matters a Lot 
