Map LegendPNR-1ZSurface locationBottom hole locationSleeve midpointDeviation surveyMicroseismic eventsMagnitude heatmap (38383 events)-2.5-2-1.5-1-0.500.5MagnitudeHeatmapMicroseismic Monitoring of Hydraulic Fracturing OperationsPreston New Road Shale Gas Exploration Site, Lancashire UKContains information provided by the Oil and Gas Authority.analytic-signal/visual-analytics