Why do geologists monitor Mount Fuji around the clock?

Geologists monitor Mount Fuji around the clock because it is classified as an active volcano that has erupted more than 15 times since 781 CE. Although it has been dormant since its last major eruption in 1707, the potential for future activity remains a significant concern due to the extensive damage such an event could cause to the surrounding region.12

Monitoring is essential for public safety and early warning, as volcanology relies on tracking specific precursors to predict eruptions. Techniques such as using seismographs to detect earthquake tremors—which often signal the upward movement of magma—are critical for forecasting potential outbursts. By maintaining 24-hour surveillance, geologists aim to identify signs of unrest early, helping to mitigate the risks posed by this iconic but hazardous mountain.32