Earthquake swarm under Asosan volcano, Alert Level raised, Japan
A seismic swarm started under the Asosan volcano in Japan on January 30, 2023, prompting the Japan Meteorological Agency (JMA) to raise the Volcanic Alert Level from 1 to 2.
Significant underwater gas emissions at Nishinoshima volcano, Japan
Satellites are registering significant underwater gas emissions at Nishinoshima volcano, Japan following increased eruptive activity at the volcano that started in September 2022. The activity at the volcano further intensified on October 2 and 3.
Increased ash emissions at Nishinoshima volcano, Japan
Ash emissions at Nishinoshima volcano, Japan increased on October 2 and 3, 2022, after more than 12 months of relative quiescence.
Comprehensive preparations for a possible eruption of Mount Fuji, Japan
Japan’s National Police Agency (NPA) has started making comprehensive preparations for a possible eruption of Mount Fuji (Fujisan) – the country’s highest and most noted volcano, located 100 km (62 miles) SW of Tokyo. Its last known eruption took place in December 1707 (VEI 5), spewing ash for more than 2 weeks, with a few centimeters accumulating in the city of Edo, present-day Tokyo.
New aerial images of newly-created island at Fukutoku-Oka-no-ba volcano, Japan
The Japan Coast Guard has made another overflight of the newly-created island at Fukutoku-Okanoba volcano on August 26, 2021. The island has grown in size since the last flight on August 16 and a large amount of pumice is still present near the volcano. Image…
New island discovered after major submarine eruption at Fukutoku-Oka-no-Ba, Japan
A new island has been discovered some 50 km (31 miles) south of Iwo Jima, Ogasawara Islands, Japan just three days after a major submarine eruption at Fukutoku-Oka-no-Ba volcano. According to the Japan Meteorological Agency (JMA) the new island is approximately 1 km…
High-level eruption at Fukutoku-Oka-no-Ba submarine volcano, ash to 16.4 km (54 000 feet) a.s.l., Japan
A major eruption started at the Japanese submarine Fukutoku-Oka-no-Ba volcano at around 21:20 UTC on August 12, 2021, and continued into August 13. According to the Tokyo VAAC, volcanic ash was rising up to 16.4 km (54 000 feet) above sea level at 23:50 UTC and…
Suwanosejima ejects large rocks 1 km (0.62 miles) from the crater, Japan
Suwanosejima volcano erupted at 15:04 UTC on June 22, 2021 (12:04 JST, June 23), ejecting large rocks as far as 1 km (0.62 miles) from the crater and prompting the Japan Meteorological Agency (JMA) to raise the Volcanic Alert Level from 2 to 3 (on a scale of 1 – 5)….
Suwanosejima volcano erupts, prompting JMA to raise the alert level to 3, Japan
Two strong eruptions were recorded at Suwanosejima volcano, Kagoshima prefecture, Japan on March 30, 2021, ejecting large rocks nearly 1 km (0.62 miles) from the crater and prompting the Japan Meteorological Agency (JMA) to raise the alert level to 3 (on a scale of…
Strong eruption at Suwanosejima volcano, Alert Level raised, Japan
A strong explosive eruption took place at Suwanosejima's Mt. Otake crater at 17:51 UTC on December 27, 2020 (02:51 JST, December 28). As a result, the Japan Meteorological Agency (JMA) raised the Alert Level from 2 to 3 — Near-crater warning, do not approach…