Closed lisa-usgs closed 7 years ago
I believe the grays are a depth scale. This will need to be handled similarly to other overlays (like Hazard, ShakeMap, DYFI, etc)
The grays are associated with depth on the interactive map, but on the map/list for the search results, the colors are associated with earthquake age. These grays appear to be for earthquakes older than 30 days.
Looks like there are now gray EQ symbols on the map for EQ Search results when the events are older than 30 days, but the legend at the bottom of the map was not updated to reflect this new symbol color.