A beach is deserted after swimming was prohibited as the megaquake advisory was issued in Nichinan, Miyazaki prefecture, southern Japan, on Aug. 9, 2024. (Kyodo News via AP)

Stone lanterns fall at a shrine following a strong earthquake in Nichinan, Miyazaki prefecture, southern Japan, on Aug. 9, 2024. (Kyodo News via AP)

A person checks emergency kit sold at a shop following a strong earthquake in Shibushi, Kagoshima prefecture, southern Japan, on Aug. 9, 2024. (Kyodo News via AP)

University of Tokyo seismologist Naoshi Hirata, left, a member of an expert panel, speaks during a press conference on the possible Nankai Trough earthquake, at Japan Meteorological Agency in Tokyo, on Aug. 8, 2024. (Kyodo News via AP)