Dense spatial sampling of ground motion data
A comment by Edward Cranswick
I was impressed by the variability estimate you were able to obtain from the dense spatial sampling of precipitation. A similar scheme of spatially dense seismic data sampling would be useful for understanding the variability of ground motions produced by earthquakes in urban areas. This information would be very useful in keeping the public interested in and aware of the phenomena related to seismic hazard and, more cosmically, natural environmental fluctuations in general.
Sensitivity of storage gauges
A comment by Julia Fonseca
Let's hear it for dedicated volunteers, without which this low-tech, low-budget approach would not have been possible! I'm interested to know more about the sensitivity of the oil-filled storage gauge measurements. Do you know if the storage gauge measures high-volume rainfalls better than low-volume rainfalls? I don't think the effect would greatly affect the variability you see, if evaporation of "trace" rainfalls that fail to penetrate the oil occurs, it could diminish low-volume rainfall observations even more (relative to the highs). Also, I know from experience that it is easier to measure the rainfall in these gauges when the change is large, but I'm not sure that this error would always be biased to reduce the low-volume rainfalls.