Figure 5
From: High-resolution precipitation monitoring with a dense seismic nodal array
The relationship between seismic PSD and hailfall. (a) Similar to Fig. 3c, the blue line shows the smoothed rain gauge precipitation rate for the event on 26 April 2016, and the red line shows the smoothed seismic PSD converted precipitation rate using the relationship in Fig. 3e. A clear overestimation appears at around 21:15 UTC. Circles show the probability of hail of any size (POH) estimated from the ground-based weather radar, and both their sizes and colors show the maximum expected hail size (MEHS). These hail related parameters are only plotted when their corresponding storm cell location is less than 0.5 km from the closest place with rainfall (over 0.3 mm h−1 precipitation rate indicated by both the radar and the seismic PSD relationship in Fig. 3e). Times with multiple nearby storm cells may show multiple circles. Stars show human hail reports (treated as POH 100%) that are less than 10 km from the closest seismic station, with colors showing the reported hail size. The storm cell before 20:00 UTC did not pass the rain gauge (Movie S5). (b) The left panel shows the PSD-PR difference when the total precipitating areas are larger than 20 km2. Solid line shows the median value for the precipitating area, while dashed lines show 25th and 75th percentiles. The right panel shows histograms for the median of this PSD-PR difference (solid grey lines in the left panel) for all events (Fig. S5). Red bars are collected at times when POH is greater than 80%, and blues bars are collected when POH is zero. Median values for these two histograms are plotted as dotted lines in the left panel.
