Portals come in pairs, portal and end portal. Opens a portal and an end portal appears somewhere in time and space. Enters a portal, exits at the end portal, bidirectional once the two places are connected.
Why does the end portal travel northwards?
Is there a region near at the Equator where the end portal only moves westwards due to Earth's spin.
Should Earth's orbital rotation be considered? Is gravity involved? Maybe the descend of the end portal is due to Earth's rotation around the Sun.
When the end portal opens up in the sewage or underground waterway, there will be a gust of water out of the portal.
Be careful.
