iiinova — where your digital self keeps evolving

Fumihiko Ikegami @fikgm.bsky.social · 15/06/2026

Free phone wallpaper! Thanks ESA Sentinel-2 for these beautiful imageries of Titan Ridge volcano in Bismarck Sea. Processed raw images with Adobe Lightroom Classic.

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Fumihiko Ikegami @fikgm.bsky.social · 14/06/2026

Finally, the eruption of Titan Ridge volcano in Bismarck Sea looks ending. It is emitting only a small amount of pumice. And luckily, the winds blow the pumice rafts away from the islands of Manus. The rafts are only seen in lagoons. browser.dataspace.copernicus.eu?zoom=13&lat=...

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Fumihiko Ikegami @fikgm.bsky.social · 05/06/2026

Eruption of Titan Ridge Volcano, Bismarck Sea, PNG, continues. Floating pumices have heat signatures in the infrared band. S2B_MSIL2A_20260604T003659_N0512_R059_T55MES_20260604T022938.SAFE browser.dataspace.copernicus.eu?zoom=14&lat=...

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Fumihiko Ikegami @fikgm.bsky.social · 30/05/2026

One Hunga Tonga umbrella is going to Tonga Geological Services. I believe that it is the right place to donate one.

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Fumihiko Ikegami @fikgm.bsky.social · 30/05/2026

Had some heated discussion that serpentine is whether igneous or metamorphic.

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Fumihiko Ikegami @fikgm.bsky.social · 22/05/2026

High-res footage of the Titan Ridge volcano eruption at the Bismarck Sea. A satellite imagery tasked by Fumihiko Ikegami. Captured by Gokturk-1. Delivered by @skyfi.bsky.social . Here we see two vents and numerous steaming meters-sized giant pumice blocks.

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Fumihiko Ikegami @fikgm.bsky.social · 19/05/2026

Another magnificent photo has been dropped... Aerial photo by Stanis Yohang. www.facebook.com/syohang1/pos...

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Fumihiko Ikegami @fikgm.bsky.social · 17/05/2026

The eruption of the unnamed submarine volcano at Bismarck Sea continues. Local fishermans posted the photos of the eruption as well as the pumice raft. 1-3. www.facebook.com/groups/19995... 4. www.facebook.com/photo?fbid=1...

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Reposted by Fumihiko Ikegami

ChappronneuilTV @chappronneuiltv.bsky.social · 16/05/2026

In the weekly GVP report from May 14th, the Rabaul Volcano Observatory and some addition sources indicate that the eruption started on May 8th. It seems that the eruption location match the 1972-eruption location. 🔗 volcano.si.edu/volcano.cfm?... #actu #eruption #science #volcano

volcano.si.edu

Global Volcanism Program | Central Bismarck Sea

SOFAR signals resembling those produced at known submarine eruptions were recorded in January 1972 in the central Bismarck Sea (Johnson et al., 1981). The source of the signals was at the junction of ...

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Fumihiko Ikegami @fikgm.bsky.social · 16/05/2026

CMT solutions, 100% natural (in fact, these are more like nuclear explosions rather than earthquakes.)

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Fumihiko Ikegami @fikgm.bsky.social · 15/05/2026

One of the most epic submarine volcanology pic has been dropped!! S2B_55MES_20260515_0_L2A browser.dataspace.copernicus.eu?zoom=13&lat=...

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Fumihiko Ikegami @fikgm.bsky.social · 12/05/2026

An ongoing submarine volcanic eruption at Bismarck Sea (Manus back-arc basin), Papua New Guinea. From previously undocumented caldera(?) volcano. No map. Not in any database. browser.dataspace.copernicus.eu?zoom=13&lat=...

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Fumihiko Ikegami @fikgm.bsky.social · 24/04/2026

JMA starts selling the plush of Voluken（ぼるけん）, their mascot of volcano. The each corresponds to the alert level. Unfortunately, the online shop appear to ship only to Japan. You can also purchase them at the museum of JMA in Tokyo. harerun-shop.com/products/%E3...

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Fumihiko Ikegami @fikgm.bsky.social · 20/04/2026

Small tsunami, visible at Kuji, Iwate. www.youtube.com/watch?v=hHN_...

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Fumihiko Ikegami @fikgm.bsky.social · 14/04/2026

Literally big if true... A tomography study suggests that there is 5000 km3 of magma beneath Tuscana, Italy. The image is sketchy though. www.nature.com/articles/s43...

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Fumihiko Ikegami @fikgm.bsky.social · 14/04/2026

Since April, most of JAMSTEC (the largest marine geoscience institute in the world) vessels can't depart for voyages because the oil prices are too expensive. Disastrous.

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Fumihiko Ikegami @fikgm.bsky.social · 31/03/2026

My last working day at the Geological Survey of Japan! In my next chapter, I weight more on the industries than academia.

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Fumihiko Ikegami @fikgm.bsky.social · 15/03/2026

Watching a strike-slip geomorhology every day reduces one's risk of cancer by 50%.

The bathymetry of Buldir Depression, Aleutian arc.

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Fumihiko Ikegami @fikgm.bsky.social · 11/03/2026

15 years. Never, never caught by tsunami.

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Fumihiko Ikegami @fikgm.bsky.social · 02/03/2026

Apparently, a dyke injection event is ongoing near Irabu Knoll, at the southern Okinawa Trough back-arc basin. (Hypocenters: JMA; Bathymetry: GEBCO, JAMSTEC, Japan Coast Guard)

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Fumihiko Ikegami @fikgm.bsky.social · 02/03/2026

In the beginning of 2020s, the humanity lost more than 10M people for the COVID-19. Then the war in Ukraine has consumed >1M people. Now wars are spreading to everywhere, and dictatorship is winning over the democracy. The 2020s is going to be the darkest era in this century. We all did wrong.

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Reposted by Fumihiko Ikegami

Douwe van Hinsbergen @vanhinsbergen.bsky.social · 23/02/2026

Yup, it’s what we called the Kalimantan slab that lies in the transition zone. Broke off north Borneo and Palawan, about 15 Myr ago!

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Fumihiko Ikegami @fikgm.bsky.social · 22/02/2026

Rare deep EQ at the north of Borneo. van der Meer et al. (2018) Tectonophysics, has some mantle transects in the region. www.sciencedirect.com/science/arti...

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Fumihiko Ikegami @fikgm.bsky.social · 06/02/2026

Metallic (specular) shading best matches for a cinder cone.

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Fumihiko Ikegami @fikgm.bsky.social · 05/02/2026

Nice www.geoanalyst.org/wp-content/u...

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Fumihiko Ikegami @fikgm.bsky.social · 04/02/2026

Very interesting paper from China. They drilled two 10-km holes in 2025 and found hydrocarbon from that depth. Zhu & Huang (2026) Comm. Earth Environ. Ultradeep drilling beyond 10 km revealing new insights into Earth systems and resources www.nature.com/articles/s43...

nature.com

Ultradeep drilling beyond 10 km revealing new insights into Earth systems and resources - Communications Earth & Environment

Hydrocarbons can persist and migrate far deeper than previously assumed and may coexist with natural hydrogen, geothermal fluids, and metal-rich brines, according to a synthesis of geochemical and pet...

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Fumihiko Ikegami @fikgm.bsky.social · 04/02/2026

Diagram: Structure of the Deep Earth - by Fumihiko Ikegami ikegami.substack.com/p/diagram-st... The figure I've posted before + A bit of additional notes.

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Fumihiko Ikegami @fikgm.bsky.social · 26/01/2026

Some impressive eruption photos (between 2004-2025) from Kirishima Geopark www.facebook.com/media/set?va...

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Fumihiko Ikegami @fikgm.bsky.social · 26/01/2026

English version! The colors of the mantle are based on the actual mineral colors (except lithospheric mantle). If you have any idea or suggestion, let me know!

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Fumihiko Ikegami @fikgm.bsky.social · 25/01/2026

Holiday drawing. (Don't worry. I'll create the English version too.)

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Fumihiko Ikegami @fikgm.bsky.social · 24/01/2026

JMA has raised the alert level for Yakedake volcano in Japan due to the increased seismicity as well as the tilt change suggesting an edifice inflation. (Google Translated Image attached) www.jma.go.jp/bosai/volcan...

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Fumihiko Ikegami @fikgm.bsky.social · 24/01/2026

Where Volcanoes Form on Earth? open.substack.com/pub/ikegami/... Many textbooks are still stuck at the level of understanding from the formative era of plate tectonics—over 50 years ago. In this article, I organize where on Earth volcanoes occur.

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Fumihiko Ikegami @fikgm.bsky.social · 14/01/2026

Links to Geology-related Open GIS Data open.substack.com/pub/ikegami/...

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Fumihiko Ikegami @fikgm.bsky.social · 14/01/2026

What happens in my mind when I "read" the topographical contours. 1→2. Compute the Slope (Focus onto the dense-sparse of the contour lines). 2→3. Integrate the Structure (Track the ridges and valleys). 3→4. Synthesize the Terrain. (Overlaying data to build the 3D mental model.)

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Fumihiko Ikegami @fikgm.bsky.social · 14/01/2026

A magnificent ocean sediment transport from Yangtze River to Okinawa Trough is seen today. It is probably due to the strong westerly seasonal wind these days. weather-models.info/latest/himaw...

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Fumihiko Ikegami @fikgm.bsky.social · 13/01/2026

Seismotectonics of Hokkaido, the collisional area between NE Japan and Kuril arcs. GEBCO, AW3D30, GSHHG, GlobalCMT (M>4, 1991-2020), Uchide (2022)(GSJ, AIST), JMA Unified Hypocenters (1998-2021, D<20 km), Seamless Geological Map (GSJ, AIST), Volcanoes and Calderas (GSJ, AIST)

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Fumihiko Ikegami @fikgm.bsky.social · 03/01/2026

Dear US citizens, we can't wait another 3 years for you to fix your government.

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Fumihiko Ikegami @fikgm.bsky.social · 30/12/2025

The download page of USGS's slab2 dataset looks gone. www.usgs.gov/data/slab2-a... Here is the alternative download link. I downloaded it in May. drive.google.com/file/d/1lrP1...

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Fumihiko Ikegami @fikgm.bsky.social · 26/12/2025

JAMSTEC R/V Kaimei is livestreaming from Mariana's NW Rota-1 volcano right now... www.youtube.com/live/hIb3QTz...

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Fumihiko Ikegami @fikgm.bsky.social · 22/12/2025

Geological Survey of Japan has released the raw drone videos of the eruption of Shinmoedake back in July. storage.repository.aist.go.jp/1104/index.h... DJI_20250703140503 has the footage of the most intense part of the eruption.

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Fumihiko Ikegami @fikgm.bsky.social · 21/12/2025

Igneous mafic-silicic something. Don't ask me what was happened here in 120 Ma tonalite. Shikanoshima, Fukuoka, Japan.

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Fumihiko Ikegami @fikgm.bsky.social · 21/11/2025

I am pretty impressed to Gemini 3. It is the first AI I am scared of. We dont probably need human researchers to find a scientific question anymore. Only lab rats and field explorers will survive this major extinction. Good luck.

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Fumihiko Ikegami @fikgm.bsky.social · 10/11/2025

The underwater seismometer network is so great, as evidenced from yesterday's EQ off-Tohoku. Reposting unofficial visualization by x.com/kotoho76/sta...

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Fumihiko Ikegami @fikgm.bsky.social · 08/09/2025

Updates from JMA regarding the eruption of Iwojima (Ogasawara Io-to). www.data.jma.go.jp/vois/data/re...

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