The specific location of the auricular groove in the ear is as follows:

1. Superior auricular groove: located above the auricle, along the junction of the auricle and the temporal part (temple). This is a slightly upward-sloping indentation and is one of the common places where many people get their earrings or earrings pierced.

2. Posthelix groove: located behind the auricle and at the connection with the head. This depression is located on the upper part of the posterior edge of the auricle and is relatively shallow and can be touched behind the outer ear.

3. Anterior auricular groove: located in front of the auricle, at the junction of the auricle and the face. This depression is relatively shallow and is one of the most common locations for earring piercings.