At around 5:46 a.m. on the 19th, an earthquake measuring 3 on the Japanese seismic scale occurred in Nemuro City, Hokkaido. According to the Japan Meteorological Agency, the epicenter was off the southeast coast of the Nemuro Peninsula, at a depth of about 80 kilometers. The magnitude of the earthquake was estimated to be 4.6 on the Richter scale. There was no tsunami.

At around 6:33 a.m., a magnitude 2 earthquake occurred in Erimo Town, Hokkaido, and Higashidōri Village, Aomori Prefecture.

The seismic intensity at around 5:46 a.m. was as follows:

Seismic Intensity 3: Nemuro Ochiishihigashi (Hokkaido) ▽ Seismic Intensity 2: Nemuro Toyosato, Nemuro Makinouchi, Nemuro Atsutoko, Hama-naka, Shibecha Toji, Betsukai, Nakashibetsu Maruyama, Shibetsu Town Hall, Rausu Cape (Hokkaido), etc. ▽ Seismic Intensity 1: Kushiro, Nemuro, Nakashibetsu, Rausu (Hokkaido), etc.