Yes, El Salvador is further west than the prime meridian (zero degrees latitude). The midpoint of El Salvador is further west by approximately 5,753 miles (9,259km).
No, El Salvador is not further east than the prime meridian (zero degrees latitude).
Yes, El Salvador is further north than the equator. The midpoint of El Salvador is further north by approximately 953 miles (1,534km).
No, El Salvador is not further south than the equator.