We also sampled drowned trees in a fault-dammed lake to date past earthquake(s)
06.03.2026 07:29
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We also sampled drowned trees in a fault-dammed lake to date past earthquake(s)
French Guyane shares a 730 km border with Brazil, making Brazil the country with the longest land border with France.
Last week trenching the northern Alpine Fault at Blue Grey River w/ @stef-eq-geology.bsky.social and @jameslagreca.bsky.social and friends looking for paleoearthquakes. Many sandfly enemies too
Lago d’Orta, Piémont, Italie, mars 2026
G. De Empoli: « Les seigneurs de la tech ont établi une forme d’empire, sur les sphères publique et politique, et dans la vie de chacun d’entre nous. »
« puisque le défi est philosophique et culturel, toute résistance commence par la connaissance. »
legrandcontinent.eu/shop/produit...
The picture shows remnants of the port (piers, towers) excavated from the ground after massive uplift during the 365 AD Crete earthquake
At the bottom of the cliff, the picture shows a perched ter race and related notch, probably uplifted during the 365 AD Crete earthquake
Phalasarna was a Hellinistic port that was massively uplifted (~8 m) during the well-known 365 AD M>8 Crete #earthquake.
Perched notches are also visible in the area.
link.springer.com/chapter/10.1...
Visiting the Knossos palace is mandatory when spending several days in Crete 🤩
How far the Minoan civilization has been shaped by #earthquake activity is discussed in this book:
lup.be/book/minoan-...
Kalispera Hellas 🇬🇷
Map of Myanmar area showing sharp color change along the fault running roughly north-south. Red on west side where land moved northward.
NASA JPL ARIA project analysis of data from Copernicus Sentinel-2 optical and Sentinel-1 radar images measured the slip on the Sagaing Fault in Myanmar. Quick preliminary map. More details later. Fault ruptured about 500 km (300 miles) in the magnitude 7.7 […]
[Original post on mastodon.social]
Screenshot of Myanmar M7.7 surface rupture map service
Remote surface rupture observations for the M7.7 2025 Myanmar earthquake - soft rollout!
doi.org/10.5066/P1RY...
Simple fault trace and slip distribution from pixel tracking, high-res from available imagery. Watch for updates!
⚒️ USGS and collaborators effort led by @nadinegrr.bsky.social 🙏
A ~500 km surface rupture length might be a record for a continental #earthquake of this magnitude, but relatively "moderate" max. offset would balance (?) to get a coherent moment
This matches very well with traces of the surface rupture visible a few km to the north on the high resolution Planet SkySat images (thank you Planet!). The offset road is the northernmost point on the overview, and I measured about 4.5 m of offset there.
Sorry to read that @timblor.bsky.social
Hope that your friends there are safe.
Out of the trough. The current ground is wavy.
It’s a beauty 🤩
I did not remember the hummocky pattern of the soil… is this common around ? what could be the origin of this?
Analysis of the 2024-10-05 M 4.5 Iran #earthquake signal revealed that it was a natural event, not a nuclear test seismica.library.mcgill.ca/article/view...
Here are the Proceedings of the marvellous INQUA PATA Days in Chile, last october (2024), on Active #Tectonics and #Paleoseismology : libros.uchile.cl/1446
Thanks again to the organizing team !
Top: It's a sunny day and a lady in a wide brimmed hat, long sleeved shirt and bike shorts stands on a grassy hill in front of a large braided river occupying a mountain valley. Bottom: three block diagrams illustrating how faults can interact with river channels by creating a dam, shifting them laterally, or tilting the channel in retrograde.
10 years ago I thought I wasn't smart enough to study #geology, but some colleagues convinced me to try anyway. Today I just published my 2nd paper, which explores how fault ruptures can alter river behaviour and flood hazard. Check it out here! www.sciencedirect.com/science/arti...
#DInSAR
Automatic Sentinel-1 coseismic Interferogram (Descending Pass) (Track 121) for the recent seismic in #China with a magnitude of Mw 7.1, is available on @epos-es.bsky.social geoportal @fraxinsar.bsky.social
Contribution of seismology to history: the case of the 1973 Coup d’état in Chile pubs.geoscienceworld.org/ssa/srl/arti...
Dans quelques jours, l'Institut de Radioprotection et Sûreté Nucléaire disparaît, pour fusionner avec l'Autorité de Sûreté Nucléaire.
Dans ce nouveau changement, une entité survit comme depuis sa création il y a 50 ans, surmontant toutes les réorganisations : mon laboratoire, le BERSSIN.
Fier 👍
A series of free papers (until 30/12) on #seismicity triggered by dams and reservoirs
www.seismosoc.org/civicrm/mail...
Chido
Le cyclone #Chido, classé en catégorie 4, a dévasté l’archipel de Mayotte le 14 décembre 2024, avec des vents soufflants à plus de 220 km/h. C’est le cyclone le plus important depuis 1934. Le dernier cyclone majeur datait de 1984.
Un 🧵 [1/24]
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Brillant PhD thesis defense yesterday, after 3 years on such a tough topic: paleoseismology of a slow active fault in SE France. That was such a great experience to supervise your work Nicolas. Congratulations Dr Cathelin 🍾👍
Last weekend we had an amazing campaign on the Alpine-Wairau (Big) Bend of the Alpine Fault, Glenroy River. Thanks to @jameslagreca.bsky.social Liv & Alex for doing the mahi. We located THE one and only Alpine Fault outcrop in the valley and also sampled the Glenroy rock avalanche. Still buzzing!
New Zealand's Geological Masterpiece www.youtube.com/watch?v=VNPn... A cool video ad by Julian Thompson
Quick recap from todays recon of yesterdays M5.8 earthquake. Bottom line: no surface rupture observed after several transects across aftershock pattern. Lack of any surface cracking in epicentral area. Minor bank failures, lateral spread, and liquefaction features along Walker river.
Impact of deglaciation on fault slip.
I could only read the abstract right now, but this paper seems quite interesting.
pubs.geoscienceworld.org/gsa/geology/...
First update of slip model for M 7.0 - 2024 Offshore Cape Mendocino, California Earthquake.
Using closest stations (dist < 200 km). Still no selection of fault plane (both nodal planes shown).
SLIPNEAR method.
A new paleo-#Earthquake study on the eastern edge of the Upper Rhine Graben
www.sciencedirect.com/science/arti...