Monitoring the Rift: Sundered Chasm

Did you feel that?! That was just an aftershock... you should've been here a few minutes ago!$b$bI'm afraid I must call upon your services again. My instruments indicate that there is an immense disruption just west of here, far beneath the water's surface.$b$bJust as before, I need you to take the arcanometer and capture the anomaly's data.$b$bI'll cast a spell that will enable you to breathe underwater. If it wears off before you find it, come let me know and I'll renew its effects.