Experts: Yamanashi Earthquake Unrelated to Mt. Fuji; Heavy Rain Increases Landslide Risk

TOKYO (CNA) — A magnitude 5.6 earthquake struck the eastern Yamanashi Prefecture and Fuji Five Lakes area tonight, with Fujikawaguchiko Town recording a maximum intensity of 6-minus. The seismic event raised public concerns regarding a potential impact on Mt. Fuji's volcanic activity. However, experts have clarified that the earthquake is unrelated to the volcano and is unlikely to trigger an eruption. Nevertheless, they warned that the intersection of persistent rainfall and strong tremors significantly increases the risk of landslides.

According to NHK, Toshitsugu Fujii, a volcanologist and director of the Mt. Fuji Research Institute, explained that the epicenter was located approximately 20 kilometers underground between Otsuki City and Doshi Village. This region, situated on the subducting Philippine Sea Plate, is known for frequent seismic activity. Fujii noted that the epicenter is far from Mt. Fuji’s magma reservoir, meaning there is no link to the volcano’s activity.

However, Fujii urged the public to remain vigilant. With heavy rain falling in many areas, the combination of ground saturation and strong tremors creates a heightened danger of landslides and falling rocks.

Shinichi Sakai, a professor at the University of Tokyo’s Earthquake Research Institute, noted that the epicenter is in a historically active seismic zone. He advised that because the area has been subjected to rainfall throughout the day, the ground may be unstable. Residents are cautioned to watch for signs of landslides.

Sakai further advised that as it is nighttime with poor weather conditions, residents should avoid unnecessary evacuation unless immediate danger is present. Instead, he recommended keeping emergency supplies, clothing, and shoes in an accessible location in case further aftershocks occur.