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

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...

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.

Thanks!

Slush flow sounds reasonable for me. It happens very often in My. Fuji, and is called "slush nadare" (avalanche) by many geologists and civil engineers, although an avalanche is a bit misleading word I think. It is a purely sedimentally reworking process, not magmatic.

my selphie at the entrance of GSJ

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

JAMSTEC 4月の海洋調査など航海中止検討 燃料確保見通し立たず | NHKニュース 【NHK】原油の高騰が続くなか、JAMSTEC＝海洋研究開発機構が、4月に予定していた3つの船の航海について、必要な燃料を確保する見通しが立たず、順次、中止を検討していることが分かりました。 JAMSTEC

JAMSTEC to cancel all research cruises in April because of the ongoing global oil shortage...
news.web.nhk/newsweb/na/n...

The bathymetry of Buldir Depression, Aleutian arc.

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

15 years.
Never, never caught by tsunami.

The bathymetry of Irabu Knoll, as seen in YK14-16 research cruise by R/V Yokosuka of JAMSTEC.

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)

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.

The cancer spreads.

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!

Presumably some of the slab to Tethys subduction zone in SE Asia.
Figures from van de Lagemaat et al. (2023) Gondwana Research
www.sciencedirect.com/science/arti...

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...

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

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

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...

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...

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.

geoign/Geoscience_Figures: My original scientific figures for Geosciences github.com/geoign/Geosc...
Adobe Illustrator .ai file is also available for editing. CC BY-NC 4.0 License.

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

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!

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

🍞🌋

The list of the past eruptions of Yakedake in the recent 10000 years, by Geological Survey of Japan. (Google Translated image attached)
gbank.gsj.jp/volcano/cgi-...
Very active in the past, but not in the recent time.

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...

Substack banner

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.

I wrote this article in Japanese back in the New Year and now it is also available in English at my substack. I hope some people find it useful.

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