Etienne Médard
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etiennemedard.bsky.social
Etienne Médard
@etiennemedard.bsky.social
490 followers 700 following 60 posts
Earth and planetary scientist (igneous petrology / volcanology) and nature enthusiast - Associate Prof @UCAuvergne - Views are my own.
Posts Replies Media Videos
Reposted by Etienne Médard
ovpf.bsky.social
▶️ Communiqué OVPF-IPGP - 30/11/2025
. L'activité sismique sous le Piton de la Fournaise se poursuit.
. Une légère inflation semble se dessiner.
. De faibles concentrations de SO2 et de H2S, associées à une augmentation de H2O, sont enregistrées.
Toutes les infos ici 👇
www.ipgp.fr/volcanoweb/r...
November 30, 2025 at 8:23 AM
etiennemedard.bsky.social
@erikklemetti.bsky.social @olamb245.bsky.social looks like there is indeed a lower part of the plume that moved to a different direction
vcdgf555.bsky.social Evergreen Intel @vcdgf555.bsky.social · 9d
The moment of the eruption of Hayli Gubbi (the first time in at least 10,000 years) as seen from ground level.
November 23, 2025 at 10:40 PM
Reposted by Etienne Médard
fitzgabbro.bsky.social
Do you like stripy rocks? Want to study how ore deposits form? Does fieldwork in Norway sound like fun? Come do a PhD with @3oja.bsky.social and me (and a few others) at @ueaenv.bsky.social!

aries-dtp.ac.uk/studentships...
Magma emplacement and its evolution: deciphering between magmatic and tectonic processes | Aries
Dr Zoja Vukmanovic, School of Environmental Sciences, University of East Anglia Dr Gareth Fabbro, School of Environmental Sciences, University of East Anglia Dr Will McCarthy, University of St Andrews...
aries-dtp.ac.uk
October 20, 2025 at 4:30 PM
etiennemedard.bsky.social
Lactarius salmonicolor pictured this week-end 🌿#funghi #mushroom #mycology
a salmon-colored mushroom viewed from above with green plants and dry fir leaves a salmon-colored mushroom with lamellae seen from the side on a background of twigs and moss. The mushroom stem is broken and show some orange color on the edges
October 13, 2025 at 8:59 PM
Reposted by Etienne Médard
revosima.bsky.social
▶️ Les équipes du REVOSIMA étaient présentes ce matin, place de la république à Mamoudzou, pour la journée nationale de la résilience. L'occasion pour la population de s'acculturer aux risques et plus particulièrement aux risques volcaniques et sismiques 🌋.
October 5, 2025 at 9:38 AM
Reposted by Etienne Médard
brandontbishop.bsky.social
No seriously, the reason to vote for haüyne is that it's the absolute bluest thing--it is the super expensive blue that traditional aquamarine paint was made from (lazurite per MinDat when analyzed is just a variety of haüyne).
Haüyne
Sodalite Group. Also classed in the Feldspathoid Supergroup. Ideally, the two sodalite cages in haüyne's unit cell contain Na^3CaSO^4. Pale-coloured ...
www.mindat.org
September 25, 2025 at 4:28 AM
etiennemedard.bsky.social
For my American friends…
fieldmontgomery.bsky.social Force Ghost™ @fieldmontgomery.bsky.social · Sep 19
Keep in mind that this is taken from a Disney production, one that just this week won an Emmy.

It may sound vaguely apropos.

youtu.be/KYnE2Mxayco?...
Andor Season 2 | Mon Mothma’s Senate Speech | Now Streaming on Disney+
YouTube video by Star Wars
youtu.be
September 20, 2025 at 5:54 PM
Reposted by Etienne Médard
revosima.bsky.social
▶️ La campagne en mer MAYOBS33 aura lieu du 25/09 au 14/10/2025 à bord du Marion Dufresne. Cette mission s'inscrit dans le cadre des campagnes océanographiques de surveillance du REVOSIMA. Plus d'informations ici👇
@ipgp.bsky.social

@brgm.fr

@cnrs-insu.bsky.social

@ifremer.bsky.social
September 16, 2025 at 4:38 PM
Reposted by Etienne Médard
abigaillily.bsky.social
An unexpected discovery of IODP Exp 398! 200 m of ash from the Kos Plateau Tuff eruption buried in the basins around Santorini, read how it got there in our new paper in Science Advances 🌋
www.science.org/doi/10.1126/...
Submarine ash megabed fed by far-traveled, shoreline-crossing pyroclastic currents from a large explosive volcanic eruption
Volcanic ash from an eruption in Greece poured into the sea, forming a bed 200 m thick in a submarine basin far from the volcano.
www.science.org
August 13, 2025 at 6:21 PM
Reposted by Etienne Médard
volcanologist.bsky.social
We tried compiling a global database of deposit descriptions of pyroclastic density current deposits. The aim was to help us do big data analysis, look for common trends, and to support modelling.

We got some interesting results but also, found some really significant issues and gaps #IAVCEI2025
Selfie of a woman stood in front of a conference poster
July 4, 2025 at 8:05 AM
Reposted by Etienne Médard
volcanologist.bsky.social
What happens when a dense, aerated granular flow encounters a vertical barrier? What night these mean for the behaviours of pyroclastic density currents? Check out Jordan Chenery's poster at #IAVCEI2025
Photograph of a man standing in front of an academic conference poster
July 4, 2025 at 9:09 AM
Reposted by Etienne Médard
jz-volc.bsky.social
hello hi i am presenting a poster #IAVCEI2025 (session 3.4) on long-lasting ashy rhyolite eruptions esp. in Iceland, come chat come come
July 4, 2025 at 9:20 AM
Reposted by Etienne Médard
leahdorite.bsky.social
Poster board 165 today at #IAVCEI2025 !
Come see my ongoing PhD research project 🪨
July 1, 2025 at 12:02 PM
Reposted by Etienne Médard
karabrug.bsky.social
My poster is up at #IAVCEI2025! Come through and get a free sticker while you learn about the US’s new IHPV #forceasu @forcehighp.bsky.social @iavcei.bsky.social
A photo of a cloth scientific poster
July 1, 2025 at 7:20 AM
Reposted by Etienne Médard
volcanologist.bsky.social
Come and see my poster today at #IAVCEI2025 if you love field volcanology and pyroclastic density currents
Selfie photo of a woman standing in front of a conference poster
July 1, 2025 at 9:34 AM
etiennemedard.bsky.social
Still not in Geneva today 😒 #IAVCEI2025 but if you are interested in volcanic textures and highly explosive basaltic eruptions please go to poster board 97 tonight to see Lisa's work on the 8600 BP subplinian eruption of La Vache and Lassolas in the French Chaîne des Puys 🌋
July 1, 2025 at 9:50 AM
etiennemedard.bsky.social
Unfortunately I cannot be at #IAVCEI2025 today, but for people interested in olivine diffusion chronometry, please come see our posters 62 (Mayotte, presented by Kalini) and 65 (Ambae, Vanuatu, presented by Eva)🌋
June 30, 2025 at 2:16 PM
etiennemedard.bsky.social
Structural geology fieldcamp for the finishing undergraduate students on beautiful Cap de Creus (with @caroline-lotout.bsky.social and Valérie Bosse). Starting with folding and bedding/cleavage relationships in a very low-grade greso-pelitic series.
Alternating greso-pelitic layers, forming an asymetric fold. Axial plane parallel schistosity barely visible in this picture Alternating greso-pelitic layers, forming a series of folds grain-sorting in a greso-pelitic layer visualized by a progressive change in grain-size linked to a change in color view of the sea and the city of Cadaques from the field area
May 15, 2025 at 8:26 AM
etiennemedard.bsky.social
Today I was teaching binary phase diagrams with a solvus to undergrads so here is a pretty perthite with a Carlsbad twin from the hypersolvus Tolla granite (Corsica) for #ThinSectionThursday ⚒️
February 13, 2025 at 10:19 PM
etiennemedard.bsky.social
Hi @earth-science.bsky.social can you add me to the feed please? Thanks! Etienne
February 9, 2025 at 4:49 PM
etiennemedard.bsky.social
For #VolcanoMonday, I give you Manaro Voui volcano, a shield volcano on the Island of #Ambae in the #Vanuatu arc. A poorly known volcano, it flew under the radar until unrest started in the 1990s, culminating in a major eruption in 2017-2018 that lead twice to the evacuation of the entire island.⚒️🧪🌋
February 3, 2025 at 10:05 PM
etiennemedard.bsky.social
'tis the season for ice crystals ⚒️ #mineralogy #minerals #geology
January 27, 2025 at 9:23 PM
etiennemedard.bsky.social
Short introduction since I have not yet been really active here. Igneous petrologist working mostly on volcanic rocks using field, analytical, and experimental tools. Also teaching (faculty at Université Clermont Auvergne). Interested in anything linked to nature: mineral, plant, animal, landscape
January 27, 2025 at 9:09 PM
Reposted by Etienne Médard
cambridge-earthsci.bsky.social
Watch these snowflake-like dendritic clinopyroxenes twinkle as this thin section is rotated in cross-polarised light!❄️☃️ This is a rare volcanic rock called komatiite, from Gorgona. Credit: Charlie Gordon. #ThinSectionTuesday #Petrology #Mineralogy
December 17, 2024 at 9:25 AM