The Weekly Volcanic Activity Report: September 3–9, 2025
New activity/unrest was reported for 5 volcanoes from September 3 to 9, 2025. During the same period, ongoing activity was reported for 21 volcanoes.
Iwo-Jima volcano enters new eruptive period, Japan
Satellite images taken on July 19, 2024, suggest Japan’s Iwo-Jima volcano, also known as Ioto and Ogasawara-Iojima, has entered a new eruptive period.
Possibly the first eruption of magma at Ioto volcano in 1 000 years, Japan
The Japan Meteorological Agency (JMA) reports that for the first time in 1 000 years, volcanic eruptions spewing magma are believed to have taken place just off the southern coast of Japan’s Ioto island, also known as Iwojima and Iojima.
Undersea eruption detected at Ioto (Iwo Jima), seawater shooting as high as 10 m (33 feet), Japan
Aerial photos taken on Wednesday, September 12, 2018, show sure signs of undersea volcanic eruption at Japanese Ioto volcano, former Iwo Jima. The volcano has been showing increased volcanic activity since the past weekend. JMA said Wednesday that photos taken by…
