There are several quests in Destiny 2's Episode: Echoes that will teach you about the many disruptions occurring on Nessus and how they're connected to the Vex. One of these quests is called Encoded Log, and Failsafe wants you to track down its source.
Solo Enigma Protocol & All 28 Network Security Node Locations (Time Extensions) [Destiny 2]
There are several disruptions happening in Nessus, the biggest of which is the earthquakes. With changes like these, there are many questions left with few answers. A group of Hidden Agents have shared that there is something you can learn at a specific location in Nessus, and that it could reveal a larger plot you can uncover in Destiny 2 if you’re willing to look.
You will get this by teaming up with Failsafe and playing the Episode Echoes season and quest. Unfortunately for players, there is no quest marker to follow when following the quest. However, the quest description tells you to go to the Well of Echoes. You can find it on Nessus, the northwest part of the map, in The Tangle. You should either ride there or use the Artifact's Edge landing zone to shorten the time. Both are good options.
Follow the path through the Well of Echoes and you'll find a Vex teleporter that you can run through. On the other side are multiple versions of the altered Vex, with a shielded Minotaur. There are four conduit points that you must destroy, scattered throughout the room, before the Minotaur's shield disappears.
