Mt. Meakan Erupts in Hokkaido: JMA Maintains Level 2 Alert Amid Increased Volcanic Activity

On the morning of the 8th, an eruption occurred from the Ponmachineshiri crater of Mt. Meakan in Hokkaido. The volcanic plume reached approximately 100 meters above the crater and was observed flowing southeast. The Japan Meteorological Agency (JMA) is maintaining Volcanic Alert Level 2 (restriction around the crater) and is urging caution against large ballistic projectiles within a 500-meter radius of the crater.

The eruption occurred around 9:15 AM and was still confirmed to be ongoing as of 10:00 AM. So far, no reports of significant ballistic projectiles or property damage have been received. While some local residents reported seeing plumes of smoke billowing from their windows, others calmly described it as a relatively minor eruption, saying things like, "It's definitely erupting, but it's small." Additionally, some residents have reported experiencing headaches, possibly due to the eruption.

This eruption marks the first in approximately four and a half months since October 25th of last year. Some voices are raising concerns about increased volcanic activity, questioning "Why three times in half a year?" In the past, there were periods of repeated rumbling and small eruptions in conjunction with the 1952 Tokachi-oki earthquake, underscoring the need for continued vigilance regarding volcanic activity.

The meteorological observatory has determined, based on the height of the volcanic plume and the dispersal of ejecta, that it will not raise the alert level at this time. However, it is urging vehicles traveling on nearby roads and, although rare at this time of year, anyone attempting to hike, to exercise extreme caution for their safety.

Local authorities and the JMA will continue to closely monitor volcanic activity and promptly release any new information. Residents and tourists are urged to pay attention to the latest volcanic information and prioritize their safety.

The context

Mt. Meakan (雌阿寒岳, Meakan-dake) is one of Japan's active volcanoes, located in Akan National Park in Hokkaido, the northernmost of Japan's main islands. Japan is situated on the Pacific Ring of Fire, making it one of the most volcanically and seismically active countries in the world. The Japan Meteorological Agency (JMA) is the primary government agency responsible for monitoring and issuing warnings for volcanic activity, earthquakes, and tsunamis. The JMA employs a five-level volcanic alert system, with Level 2 (crater periphery restriction) advising people to stay away from the immediate vicinity of the crater due to potential dangers like ballistic projectiles and ashfall. Past volcanic activity at Mt. Meakan has sometimes been linked to seismic events, such as the 1952 Tokachi-oki earthquake, highlighting the complex geological dynamics of the region.