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 credit: Japan Coast Guard. Acquired August 26, 2021
Image credit: Japan Coast Guard. Acquired August 26, 2021
The island was discovered three days after a major eruption at the submarine Fukutoku-Oka-no-ba volcano on August 12 and 13, 2021.1
According to the Tokyo VAAC, volcanic ash produced by the eruption rose up to 16.4 km (54 000 feet) above sea level at 23:50 UTC and drifted SSW toward the Philippines.
Eruption at Fukutoku-Oka-no-Ba submarine volcano. Image credit: JMA/Himawari-8, NII/NICT, TW. Acquired at 05:20 UTC on August 13, 2021
Image credit: Japan Coast Guard. Acquired August 15, 2021
Image credit: Japan Coast Guard. Acquired August 15, 2021
Iwo Jima (left) and new island (right) on August 15, 2021. Credit: Japan Coast Guard
Iwo Jima (left) and new island (right) on August 16, 2021. Credit: Japan Coast Guard
Image credit: Japan Coast Guard. Acquired August 16, 2021
Pumice created during an eruption at Fukutoku-Oka-no-ba. Image credit: Japan Coast Guard. Acquired August 16, 2021
The last eruptive episode at this volcano started on February 3, 2010, and lasted to ~April 8, 2010 (VEI 1).
Numerous eruptions were recorded in 20th century, two of them VEI 3 and three VEI 2.
New islands have been confirmed in the area in 1904, 1914, and 1986, with all having submerged. The one found in 1986 sank after around two months, according to the coast guard.
Geological summary
Fukutoku-Oka-no-ba is a submarine volcano located 5 km (3.1 miles) NE of the pyramidal island of Minami-Ioto. Water discoloration is frequently observed from the volcano, and several ephemeral islands have formed in the 20th century.
The first of these formed Shin-Ioto ("New Sulfur Island") in 1904, and the most recent island was formed in 1986.
The volcano is part of an elongated edifice with two major topographic highs trending NNW-SSE, and is a trachyandesitic volcano geochemically similar to Ioto.2
References:
1 High-level eruption at Fukutoku-Oka-no-Ba submarine volcano, ash to 16.4 km (54 000 feet) a.s.l., Japan – The Watchers
2 Fukutoku-Oka-no-Ba – Geological summary – GVP
Featured image: Fukutoku-oka-no-ba volcanic island on August 26, 2021. Credit: Japan Coast Guard
If you value what we do here, open your ad-free account and support our journalism.
Related articles
Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, select the level of your support and register your account.
Your support makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share.
All our supporters can browse the website without ads, allowing much faster speeds and a clean interface. Your comments will be instantly approved and you’ll have a direct line of communication with us from within your account dashboard. You can suggest new features and apps and you’ll be able to use them before they go live.
You can choose the level of your support.
Stay kind, vigilant and ready!
You can also support us by sending us a one-off payment using PayPal: