I’m just playing with the mapbox density heatmap example here. When I zoom in to a certain point, the display behaves as expected.
If you zoom out from that point, the value in the tooltip is correct, but in my opinion the color is not displayed correctly or the scaling of the colorbar is wrong.
(Sorry, I didn’t exactly hit the location again, but I think you understand what I mean.)
It seems that there are quakes with the scale of 9 in Wellington (New Zealand).
Am I wrong?