Some Definitions:

MIGRATION

• A move beyond the same political jurisdiction involving a change of residence (B)
• A permanent move to a new location (Rubenstein)

IMMIGRATION

• Migration to a location.
• "The Irish immigrated to America."

EMIGRATION

• Migration from a location
• "The Irish emigrated from Ireland".

INTERNATIONAL MIGRATION

• A permanent move from one country to another

INTERNAL MIGRATION

• A permanent move within a country