pointDistance
True if the event is within the given distance range of the given lat and lon. This allows for the definition of donuts and circles of accepted events.
Example
<pointDistance>
<latitude>35</latitude>
<longitude>-85</longitude>
<unit>DEGREE</unit>
<min>30</min>
<max>90</max>
</pointDistance>
Places this can be found
backwardsEventFinder contains this directly
eventFinder contains this directly
fdsnEvent contains this directly