Azuma volcano, Honshu, Japan: news & activity updates

Azuma volcano (Japan): alert level back to normal

On 17 June JMA lowered the alert level for Azumayama to 1 (the lowest level on a 5-level scale), noting that deformation and elevated seismicity recorded in May had stabilized and decreased, respectively.

Azumayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 12 June-18 June 2019 (Continuing Activity)

On 17 June JMA lowered the Alert Level for Azumayama to 1 (the lowest level on a 5-level scale), noting that deformation and elevated seismicity recorded in May had stabilized and decreased, respectively. Read all

Azumayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 15 May-21 May 2019 (New Activity / Unrest)

The number of volcanic earthquakes at Azumayama increased on 5 May and data from a tiltmeter about 1 km SE of Ohana Crater showed inflation on 9 May, prompting JMA to raise the Alert Level to 2 (on a 5-level scale). Field observations on 7 and 10 May indicated no changes in the fumarolic and thermal areas around Ohana. Seismicity began to decrease on 10 May, though continued to fluctuate through 20 May. Read all

Azumayama volcano (Japan): increased seismic activity, alert level raised

Japan's Met Office (JMA) detected increased seismic activity at the volcano and raised the alert level to 2. Access to the crater, a popular walking trail, is now closed.

Azumayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 30 May-5 June 2001 (New Activity / Unrest)

On 29 May the Fukushima Local Meteorological Observatory reported that seismic activity increased slightly beneath Azuma during May. The Coordinating Committee for the Prediction of Volcanic Eruptions'seismic network detected 51 small-magnitude volcanic earthquakes during 21 and 22 May and 39 on 21 May (the most recorded in one day since November 1998). During March four low-frequency tremor events were recorded, while 40 were detected in April. Read all