Dear friend, welcome to HCM!
It is common to have pulsations felt above the navel in thin lean individuals.
Since USG was normal, there no worry about the
aneurysm.
If you are thin and/ or anxious, you may feel pulse of the
abdominal aorta easily. Neglect and be happy.
Take care and please keep me informed of your progress.
Good Luck!
I hope to have answered your query satisfactorily.
Thank you!