  This paper explores the properties of the quasinormal modes (QNMs) of a
regular black hole(BH) characterized by a Minkowski core and sub-Planckian
curvature. When focusing on a special case, this regular BH exhibits identical
large-scale behavior with the Hayward BH and some loop quantum gravity
corrected (LQG-corrected) BH. A notable characteristic of the QNMs in this
regular BH is the pronounced outburst of overtones when compared to the
Schwarzschild BH (SS-BH). This outburst can be attributed to the deviation from
the SS-BH in the near-horizon geometry region due to the quantum gravity
effect. Furthermore, we compare the QNM properties of the regular BH with those
of the Hayward BH and the LQG-corrected BH. A similar phenomenon of overtone
outburst is observed in the modes of the overtone. As a conclusion, the QNMs
may be a powerful tool for detecting the quantum gravity effect and
distinguishing different BH models.
