The Blitzortung Participants Page Station effectivity figures may shock some. As several of us suggested beginning last year, when the primary push began for 'quality' of station data, this will be reflected in the calculations.
Here's the latest info:
http://forum.blitzortung.org/showthread.php?tid=1261&pid=9739#pid9739A key phrase in that post is
This is the old effectivity value multiplied by the factor min (Strikes / Signals(s), Signals(s) / Strikes) to consider also the strikes/signals relation (and to punish the stations that send a lot of trash .
(Which now includes me with my newly hatched environmental sporadics... arrggghh)
We've also suggested that all update their antenna types or correct them on the 'services' page. If you haven't, we've posted several examples throughout this forum on how that should be done.