Luca Malatesta

Arrived in Christchurch, and in summer, for the IAG conference. Good vibes all around.

Nice Keynote to start day 2 of #ISC2026 from Prof Kyoto Kataoka using sediment cores from lakes and basins to study the volcanic activity from Japanese volcanoes. Looking at tephra, lahar and a range of volcanic erupt I’ve outputs - shows a much more complex and comprehensive volcanic history.

An airplane panoramic view of Mt Fuji and surrounding. The summit is coated in white snow.

Fuji san upon arrival last Friday.
65x24
🗻

A de icing machine sprays the wing of an aircraft

Trichromatic de-icing
with Trichromy from @heliographe.studio

Mass start at the Neues Palais in Potsdam

A new preprint, led by Bar Oryan, introduces the Coupling Cloud: a community database that curates, standardizes, documents, and disseminates published kinematic coupling models inverted from geodetic data. As of today it brings together 96 coupling datasets drawn from 55 publications spanning

The regular expression to split text into tokens before identifying and grouping changes. By Frederik Tilmann.

Frederik Tilmann has published an interesting post about the development of `latexdiff` since 2004 as version 1.4.0 is just released. Besides `latexdiff` Frederik also busies himself with being a professor of seismology.
www.linkedin.com/pulse/some-r...

These cumulative energy release plots are always great visuals

#EarthquakeReport for 2025 Annual Year in #Earthquakes and #Tsunami

See summaries and interpretive posters for 13 earthquakes from 2025

See cumulative energy release plots for M≥6.5 earthquakes from 2017-2025

earthjay.com?page_id=12459

Fog streams.
Mont Blanc in the top left.

Mt Blanc in late afternoon light from the Jura

Fog streams.
Mont Blanc in the top left.

Beautiful. Missing it. everything remains so crisp in the distance.

Ho ho ho, Daisuke Ishimura @daisukeishimura.bsky.social has joined bluesky! 🎄
(pssst @earthjay.bsky.social )

There might be some use in finding answers to a set question. But less in realising that there was a better question. That latter exercise is the hard part.

I should actually check with Alessio if the terraces on Noto Peninsula are relevant for WALIS (we will soon have radiometric ages for 5e). also working on digitizing all 7k+ 🗾MIS5e terraces from Koike and Machida (2001) Atlas. But only few have radiometric control.

bsky.app/profile/geol...

Realizing now that by traveling southwest from Berlin to Switzerland, I bought myself an extra 55 minutes of daylight on solstice day!

Map of the Noto Peninsula and Sado Island in Central Japan

We'd have loved to share this at #AGU25
With marine terraces (4767 platforms 🖱️💪Nina!) spanning the last Myr we show that the faults of the Noto Peninsula EQ started slipping around 300 ka. A landscape evol. model explains the transient topography of the peninsula. 1/3
doi.org/10.1029/2025...

The Noto Peninsula overlain with a shapefile of 4767 terrace units.

The digitized marine terrace dataset can be downloaded as a shapefile on Zenodo (🔗 below). 4767 individual platforms distributed across 16 generations from the Atlas of Koike and Machida (2001). Maybe the most extensive erosive terrace record at a single site? 3/3

doi.org/10.5281/zeno...

Two slope maps of the bathymetry around the Noto Peninsula and Sado Island highlighting the location of a nearshore scarp.

The EQ faults (& scarp) are drowned by the current high stand. Nearby Sado Island shares similar deformation record and is flanked by a similar nearshore scarp. It is the potential location of a large fault system initially suggested by Ota Yoko in 1992 (she was 🎯). 2/3

Map of the Noto Peninsula and Sado Island in Central Japan

We'd have loved to share this at #AGU25
With marine terraces (4767 platforms 🖱️💪Nina!) spanning the last Myr we show that the faults of the Noto Peninsula EQ started slipping around 300 ka. A landscape evol. model explains the transient topography of the peninsula. 1/3
doi.org/10.1029/2025...

Very impressive.

Timelapse via #Copernicus Browser
link.dataspace.copernicus.eu/xvxi

Japan meteorological Agency map showing the shindo intensity.

JMA explanation of the shindo scale

Shaking was strong, up to shindo 6+. I imagine that liquefaction is a bigger concern. We will know more in the morning.
NHK reports 6 injured in Aomori prefecture (falling objects and falls). 2/2

screen shot of the Japan Meteorological Agency's tsunami advisory with added location of Kushiro and Ofunato

Tide gauge at Kushiro showing tsunami arrival at low tide. Tsunami is ca. 0.25 m.

Tide gauge at Ofunato showing tsunami arrival at low tide. Tsunami is ca. 0.3 m.

Fortunately, the M7.6 earthquake struck at low tide, reducing the impact of the tsunami (itself smaller than feared, max 70cm observed). 1/2

Current screenshot of Kilauea USGS webcam

Also, you should really check out Kilauea right now! ⚒️🌋
www.youtube.com/live/tk0tfYD...

North of the Bering Strait earlier today.
First Northern Lights for me!

It makes a whole lot of sense yes, the coastal slope hosting the initial road is very landslide prone. (Actually the initial road has been wiped down). Google map has been updated, but the satellite images are still pre-EQ. Free flat land!

Noto coast in Nov. 2023. Waves come all the way up to a concrete embankment protecting a cliff

Noto Coast after 2 m coseismic uplift. 100 m wide rock platform is now emerged

A road is now built on the bedrock platform, protected by a new sea wall

On Noto Peninsula where coseismic uplift was ~2m.
Sequence pre-earthquake, EQ +3 months, EQ +23 months. I thought we would be able to monitor this nice flat surface for weathering efficiency over the years…

🙌🏻

Noto Earthquake and submarine landscape. After a loooong time looking for reviewers, we received good critical comments which led to notable revisions. Now back in review at GRL hoping that the 2nd round will be shorter than the 6 months of the first: doi.org/10.31223/X53...