US East lag

To start I know there is another thread about US East having lag. But I was curious(correct me if I’m wrong) solum, vulpto and epsilo are all US East planets. My question is why on solum (ping still goes nuts thanks to my isp) I get about 80ping that fluctuates to 120 and sometimes I get a nice 40ping. But when I go to vulpto or epsilo I have about an 800 to over 1k ping. So I take it they ARE us east servers just farther north or south then me IRL geographically speaking?
Thanks in advance for answers and comments