A strong supervisory team is always helpful

Weather kind so far, also joined by curious companions.

Second day of servicing broadband seismometers with colleagues at Gutenberg University Mainz and IVAR research institute here in the Azores (with soil moisture sensors installed also).

Landed in São Miguel, Azores, to begin fieldwork installing soil moisture sensors on Fogo volcano.

That 'someone' chap sounds like a good guy!

In Potsdam for a couple weeks, visiting GFZ to work on a Geo-INQUIRE project analyzing DAS recordings from Mt Etna.

Exciting things to come for sure!

Next September, Istanbul (Türkiye) will host the 40th General Assembly of the European Seismological Commission #ESC2026
With @rosalialobue.bsky.social , B VanderBeek and @asyates2.bsky.social, I will convene Session 55 – Seismology for Volcano Structure and Stress 🌋

www.esc2026.org/medya/sessio...

Furthermore, if frequencies truly are responding to velocity changes, such that df/f ~ dv/v, it implies that we can access dv/v directly from a spectrogram during tremor episodes, avoiding some of the complexities associated with obtaining dv/v through noise interferometry (5/5).

The observation that frequencies appear to respond to velocity changes in proximity to the recording station (using single-station interferometry) highlights need to better clarify the role of source, path, and site effects in the recorded seismic wavefield (with peaks varied across stations). (4/5)

Key to this is that frequency changes do not appear related to any change in the tremor source process, rather are correlated with both seasonal processes (winter velocity high on edifice) and decreases following local earthquakes (with a linear relationship between df/f and PGV). (3/5)

In this work we find evidence that the frequencies of stable spectral lines during broadband tremor at Mt Etna are evolving in response to velocity changes in the medium, such that df/f (frequency changes) is approximately equal to dv/v (velocity changes). (2/5)

Tracking Subsurface Changes via Frequency Shifts in Volcanic Tremor Spectral Lines: Observations From Mt Etna Stable spectral peaks (lines) in volcanic tremor undergo frequency changes proportional to seismic velocity changes Frequencies appear to evolve in response to shear-wave velocity changes in the ...

📢 Happy to share our latest publication, titled "Tracking Subsurface Changes via Frequency Shifts in
Volcanic Tremor Spectral Lines: Observations From Mt
Etna¨.

doi.org/10.1029/2025...

More details included in this post. (1/5)

I do miss that feeling of "wow, this is really well written" when reading student work.

(as I review another masters thesis with lit review clearly written by chatgpt, this time with the wrong reference titles to back that up).

Little bit different from my usual work. Putting some nodes out at a site of a recent archaelogical dig in St Lawrence, Jersey. Aim is to apply HVSR towards detecting a layer boundary related to prior human compaction. Lets see!

La Corbière, Jersey

Taking a few extra friends back to Jersey for Christmas this year 🎄

(four smart solo seismic nodes)

Piton de la fournaise volcano in the flesh.

Had planned to hike to the summit but not to be with the elevated alert since this morning!

Arrived on La Réunion for a short stay. Realizing how big it really is when i compare it to my island of birth... 😄

The #HayliGubbi #eruption in Afar, Ethiopia, is the first documented eruption at this poorly known volcano.

Was it entirely unexpected?
Difficult to say - Berhe Goitom and colleagues already reported some seismicity in 2011-2012 so perhaps there was already some geophysical unrest for a while:

Certainly less involved in social media use for science since the days of Twitter (hoping this can change here), but my impression would have been that LinkedIn has become the no. 1. This I would like to change too ^^; find the formality of LinkedIn hard to stomach sometimes.

As Hurricane Melissa makes landfall in Jamaica, we can see its approach over the past few days on seismometers. Strong winds generated by hurricanes create ocean waves and pressure fluctuations that cause stronger up and down movements in the water column, which seismometers record.

Agree. Also english as second language, and i see someone already mentioned people briefly zoning out.

I tend to only show any bullet point at the moment I am discussing it, to avoid disconnect between what I am saying and where the attention should be focused on the slide (the main problem imo).

Leaving the Aeolien islands with a bang.

Didn't quite understand what I was getting when I ordered the Vulcano pizza 😅.

Think I've hit my pizza dough quota for awhile

Fieldwork finished, was a good one!

Now we patiently wait to see if the boats will resume; Aeolien islands living up to their name.

Cool location! Lived there for a year during my phd

Certainly one of the more pleasant field trips!

Just about finishing up on Panarea island, over two hundred short-term nodal deployments towards mapping hydrothermal alteration, with @jonaspaetzel.bsky.social and Adrian Thorn.

Having Stromboli as an 'office' view for the past few days has been quite something! A couple more days of fieldwork planned, then a cheeky trip to the volcano for a bit of tourism ;)

Definitely a bunch of fieldwork left unshared during the past year, but this can change ;)

Currently undertaking fieldwork in Panarea, Italy, with scientists from Brussels, Ghent, and Namur, to map zones of hydrothermal alteration. Worse places to be in October 😎.

This was not a planned shot ^^; almost surprisingly, first time visiting a UK institution.