Thomas R. Walter

New paper alert. Volcanic crisis reveals coupled magma system at Santorini and Kolumbo. Great work led by Marius and Jens, thanks all for working on that together! It can be found in today’s issue of Nature.

www.nature.com/articles/s41...

An eruption style transitional between effusive and explosive activity? Using satellite and drone-based photogrammetry and petrography we describe a strange type of block and ash flow deposits from Bezymianny volcano, Kamchatka. Check out our new paper in Bull Volc doi.org/10.1007/s004...

Huge congratulations to Claire Harnett on receiving the IAVCEI George Walker Award! 🌋 Your groundbreaking work in volcano modeling is inspiring — well deserved recognition!

Your talk was excellent - and as a bonus this was in an air-conditioned lecture hall. I truly enjoyed it!

100,000 orbits! The radar satellite #TerraSARX has circled Earth 100,000 times, delivering high-resolution radar data for volcanoes (and other sites of course). A milestone in space-based Earth observation leading to exciting research at #GFZ !

Big congrats to Dr. René Mania, who just defended his PhD in remote sensing at the University of Potsdam! His research focused on volcanic deformation and plumbing systems — exciting work! 🌋👏

The @rottnrock.bsky.social team arrive at Mombacho volcano 🌋 in Nicaragua 🇳🇮 to work with INETER to try to understand how alteration is influencing the volcano
@rocklabstrasbourg.bsky.social
@arianeloisel.bsky.social

3D scanning of alteration rock samples from volcanoes. It is part of the ERC project RottNRock!

Here it goes. Start of the LiDAR campaign at Laacher See in perfect conditions. We will create a landslide inventory at the caldera walls.

Slope instability is widespread at the caldera walls of Laacher See.

Amazing day at Laacher See caldera, Germany.

What to do when not studying volcanoes? Ice kiting. Just now. On a frozen lake near Potsdam.

Sentinel-1 dInSAR data we processed over Santorini area for the period 24 January 2025 - 05 February 2025. Fringes are mostly due to atmospheric disturbance. For the past 2 weeks, there is no major volcanic deformation visible in data.

Earthquake activity offshore Santorini, Greece, imaged in high-resolution and processed by Marius Isken in our team at GFZ using github.com/pyrocko/qseek

Beachball

The 'beach ball' represents the type of slip which occurs during an earthquake.
There are currently many normal fault type beach balls from earthquakes NE of Santorini island. Normal faults also escort dike intrusions, yet the true cause has to be explored still.

geofon.gfz.de/eqinfo/event...

The fluctuating hydrothermal activity at Lastarria follows a systematic pattern, with changes first seen at the summit before spreading to the flanks, as our latest work shows. Check it out here:

authors.elsevier.com/sd/article/S...

@rottnrock.bsky.social

Yes, we have a team there already installing more monitoring stations.

Glad to inform that our new paper about detecting hydrothermal deposits using the GEE platform is out. We even can identify a sulfur flow from space!
Check it out here:
authors.elsevier.com/sd/article/S...

@rottnrock.bsky.social

InSAR data processing in the Ethiopian great rift valley is stunning, many faults and continuous deformation. Most likely related to a deflated magma chamber in the south, and a dike intrusion to the north. I will use this data in my class next week, as it is so rich in information and complexity!

A photograph from our recent Chile fieldwork, here at Lascar volcano. Drone view looking down to the multigas accumulation chamber ready to be dropped at Lascar. See the fractures degassing ? This is what we are aiming for !

Jacob Brauner just successfully defended his PhD. His works on the volcanoes of Bioko island are exciting and let us all hope for more!! Congratulations Jacob!!

Drone image at 5800m showing the crater of Lascar volcano, looking north. See the little people in the foreground? That's us.

Members of the @ROTTnROCK team on their trip to study hydrothermal alteration and volcanotectonics in Chile. See the screw in the tyre? That's tyre number 2. We need another spare! @gfz.bsky.social

That's Martin and Christian installing a multigas monitoring system at Alitar, a highly variable, hydrothermally alterating and degassing maar-like structure in Chile.
@gfz.bsky.social @rottnrock.bsky.social

A view of the packed back of our pickup, with Lastarria's fumarole fields in the background. We have a generator running to charge all the batteries while we continue our survey.

Interesting sulphur structures form in the fumarole field of Lastarria volcano. Some of the tubes are almost 1 metre long and grow downwind. What would you call them?

Event map showing the location of the earthquake.

Prelim M 5.2, Iceland #earthquake (08.12.2024 01:49:44 UTC) at 10.0 km depth.

Event updates: http://geofon.gfz-potsdam.de/eqinfo/event.php?from=rss&id=gfz2024yazr

Fuck! Not again! On our volcanology tour in northern Chile.

If you have to cross a strong fumarole field by car - that's Lun, a PhD student in volcanology at the GFZ Potsdam. ⁦‪@GFZ_Potsdam‬⁩

Continuation of our drone survey over the Lastarria volcano, Chile. Perfect conditions and a lot of fun watching the amount of data grow!