My wee book has had its first formal review!
A lovely piece in @geoscientistmag.bsky.social.
I love how they've picked up on elements of my personality - didn't realise how much this came through.
"as if a geology-savvy friend is excitedly sharing something they have just learned."
#volcan #volcano #PitondelaFournaise 🇫🇷 Un second évent s'est ouvert 200m au NE du premier/A second activ vent opened ~200m NE from the 1st one
Our preliminary analysis of the satellite observations of the #hayligubbi #eruption is now available online: comet.nerc.ac.uk/event-respon.... Details of the eruption onset, SO2 emissions and precursory deformation.
Following the #HayliGubbi eruption, our paper on the Erta Ale dike of Jun-Jul is finally out. InSAR, optical data and seismicity showed the temporal evolution of the intrusion and the interaction of magmatic sources, including a sill inflation in Hayli Gubbi. @earth-science.bsky.social #geoscience
Pre- and post-eruption visible imagery of #HayliGubbi from #Sentinel-2, showing tephra deposits and 2 new craters. The latter could be eruption vents and/or formed by post-eruptive subsidence. Looks like the pre-existing crater was enlarged by the eruption. @esa.int
Hayli Gubbi - some of my photos from the Hayli Gubbi tephra sampling expedition on 24 Nov 2025 from around 10 km north of Hayli Gubbi @sorcerinsar.bsky.social @alarosa.bsky.social @wattsvolcanology.bsky.social @volckaren.bsky.social @sorcerinsar.bsky.social @alarosa.bsky.social
The #HayliGubbi eruption came after a period of unrest that started in June-July 2025 with a large dike intrusion in the southern sector of the Erta Ale rift. Our InSAR study will be out soon but you can have a summary at the link below. @earth-science.bsky.social #geoscience
The Hayli Gubbi tephra has been sampled. These are photos from my sampling expedition on 24 Nov with the University of Semera from around 10 km north of Hayli Gubbi @sorcerinsar.bsky.social @alarosa.bsky.social
Activity at Hayli Gubbi began in July when there was an eruption at Erte Ale. Magma propagated 30 km south passing under Hayli Gubbi. Since then, there has been a small plume, quasi-continuous SO2 emissions and uplift. Details in @uk-comet.bsky.social event response report: tinyurl.com/y3nfdfj8
We think there was a small eruption there in July/August (at least a small plume) and some ongoing activity there since (including continued uplift). I suspect all linked to recent activity along dyke from Erta Ale (See COMET reports on July/August activity at comet.nerc.ac.uk/event-respon...).
Sentinel-5P #TROPOMI measurements at ~11:00 UTC show most of the SO₂ emissions from #HayliGubbi spreading east in the upper troposphere. Plume contains ~44 kilotons of SO₂ (~0.04 Tg).
This figure from a perspective piece on our paper by Virginie Pinel beautifully illustrates our proposed magma-pumping mechanism!
www.science.org/doi/10.1126/...
Eruption of low-T crystal mush and determination of amphibole-melt partition coefficient relevant for silicic magmas close to the thermal minimum. Thermomechanical reactivation can lead to reawakening of a volcano after prolonged quiescence!
New paper: link.springer.com/article/10.1...
drone picture shows lava dome filled the crater of the Lewotobi volcano taken yesterday by Mbah Lurah. This might explain the initial Vulcanian phase of the large eruption occurred today.
Lewotobi, Flores, Indonesia - vulcanian to subplinian eruption with pyroclastic flows today
photo: @jose465886 twitter/X
#IAVCEI2025 It was my absolute privilege to coordinate a fantastic group of hard working colleagues that delivered a Scientific assembly of which we are proud
The crowd of volcanologists!… the #IAVCEI2025 general assembly started with important messages such as “curiosity drives human progress…” and “science and education is the best investment to the future…”
Understanding processes in trans-crustal magma reservoirs - come and apply for a 2-3 years postdoctoral fellowship to a young Hungarian research group (pannonvulkan.hu)! Details of the MSCA programme are here: momentummsca.mta.hu contact: lukacs.reka@csfk.org
IAVCEI CVS goes to Hungary! A fantastic 5 days in the field to better understand deposition of volcanogenic sediments in the natural laboratory of the northern Pannonian Basin: from diatremes through ignimbrites to lahar and volcanogenic fluvial deposits with instructive discussions!
🧪⚒️
Two days after the M7.7 earthquake in Myanmar, what have we learned?
Rapid seismological analyses shared by scientists suggest that the rupture was both longer and faster than expected - two factors that could have increased damage.
Read more: earthquakeinsights.substack.com/p/updates-on...
Map showing the segmentation of the Sagaing fault and the hypothetic historical ruptures
Today's #earthquake near Mandalay, Myanmar, had magnitude Mw 7.7 to 7.9.
Prelim. source models point to rupture duration & length of ~120s and at least 200km. It likely filled large part of seismic gap S of Sagaing (previous rupture in 1839) ⚒️ 🧪
Map from doi.org/10.1002/2013... (Wang et al.)
1/n
⚒️ 🧪
A catastrophic M7.7 earthquake struck Myanmar today, rupturing ~200 km of the strike-slip Sagaing Fault.
The USGS PAGER alert is red, indicating severe damage and many fatalities. Impacts extend from Myanmar into neighboring countries, including Thailand.
What do we know so far?
This includes the USGS Hawaiian and Alaska Volcano Observatories. HVO's Ironworks is a temporary space while a new facility is built to replace the Observatory critically damaged in 2018. Both groups are near their volcanoes. Neither has anywhere to go and both have been forbidden from telework.
HVO and AVO office leases are both on that list (I didn't see YVO or CVO when I skimmed it?). HVO is the oldest volcano observatory in the world and monitors the most persistently active volcanoes in the US. AVO monitors very high-risk volcanoes that can esp impact int'l air travel.
Dear Judith and Kyle, thank you so much again for the detailed and very instructive explanation!
in the context of the new model by Evi Nomikou and Dimitris Papanikolaou (see Figure) this seismic pattern might be related to the sudden escape of fluids (possibly gases) from the magma body beneath Anhydros
My guess is that fluids are released during the earthquakes and this case could indicate intense fluid movements in the cracks which cause resonation. I found similar patterns in the seismograms occasionally in the past days.
something could occur NE from Santorini... current seismogram picture
Hi Jannes, very instructive to see this shifting of epicenters along a straight line. Do you have an idea about the reason of that?
Hi Seismo-Bluesky! I decided to test a pipeline with SeisBench, PyOcto, NonLinLoc, and HypoDD on the Santorini sequence. The level of activity (>4,500 events) is truly stunning! There are repeated bursts migrating backwards and forwards, spreading outwards from a narrow, almost linear channel.
