Lightning anslysis can be done regionally. This example shows a summary lightning density map from an area about 200 miles by 100 miles. Lightning analysis is the least expensive geophysical analysis for evaluating large areas. It took less than 2 months and less than $50,000 to order the data, receive the data, clean the data, process the data, complete this analysisi, and generate a final report. The results look vey much like a gravity or magnetic map and we are still coming to understand all of the implications of the maps. (Play Fairway, Prospect Trends, Prospects)