There is an official USGS location marker about 20 ft from my shake and the coordinates are significantly different from what the configuration map provides. I am currently using the map coordinates but am wondering if this its the best option. The unit is not currently transmitting data.
from configuration map
from USGS marker
I believe this is a 5-10 mile discrepancy. I looked on latlong.net and they give both the Lat Long and GPS coordinates, which differ by a similar amount. The GPS coordinates from latlong.net match the USGS marker.
Looking for advice on what to use.