During the quest “A Dying Planet” you’ll have to ascend a Remnant structure, Mithrava, atop which you’ll meet with First Sage Esmus. After you’re done talking to him head southeast to find Sage Amurd, who, as he approaches dead, desires to see his sister, Amara, one last time. His memory isn’t what it used to be however, and it’s been a long time since his sister lived at Pelaav, so you’ll have to search for some records that’ll help you find out where she may have gone.
You can start this quest during “A Dying Planet”, but it’ll immediately go on hold until you advance said quest a bit until you can access the eastern part of Havarl - past the trench. After you’ve recovering Zorai’s Heirloom, however, you’ll be able to cross a bridge spanning the trench. Do so and make for the Roekaar camp at the eastern end of the level (also where the quest “A Dying Planet takes you) and search the southern-most of the three structures to find an Archive System.
Sadly, time has complicated matters a bit, so pop out your scanner and you should spot a yellow conduit on the ground. Follow it behind the building and to a generator, which generously starts back up with little fuss. Enter the building and pull the data you need off the Archive System. With this data in hand, return to Sage Amurd to complete this quest an earn yourself 530 XP.