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Jul 6, 2022

Using optical imagery from #Sentinel2 and comparing pre- and post-eq images, widespread liquefaction is visible all around the Mehran delta - the cause of irregular patterns and low coherence in the interferogram (dark spots -> fissures and sand boils with ejected sand/silt) 2/3

Risk and Resilience Assessment Centre DUTh

@riskacduth

Mar 23

The Geotechnical and Geological hazard team responded immediately to a major landslide that occurred in the mountainous region of Xanthi. Site investigation works included a survey through the use of UAS and the development of a 3D model. #landslide #riskassessment

Alba M. Rodríguez Padilla (she/her/ella)

@_absrp

Mar 20

Pre-print alert! 👋Introducing a probabilistic displacement hazard assessment framework for distributed ruptures from strike-slip earthquakes on immature faults. We are VERY interested in community feedback,

@mikeoskin

and I are pretty new to PFDHA! eartharxiv.org/repository/vie

Seismica

@WeAreSeismica

Mar 14

Melgar et al. used HR-GNSS and strong motion data to create kinematic rupture models for the Türkiye earthquake doublet. Their results reveal both sub- and super-shear rupture behavior of these events. Check out doi.org/10.26443/seism for more details.

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Patagonian Fossil Turtles

@yatachelys

Mar 4

Μέσα στον πόνο μας που χάσαμε το Βαγιακο μας, βλέπω τι λέτε τώρα πολλοί και πολλές από εσάς στα κανάλια που με φιλοξενήσατε και με βοηθήσατε όσο τον ψάχναμε. Και ένα έχω να σας πω: #τεμπη_εγκλημα #Τεμπη_αγνοουμενοι #Τεμπη_Τραγωδια #Τεμπη #Βάιος

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A preliminary report of liquefaction phenomena triggered by the Feb 6 2023 earthquake in Turkey/Syria can be downloaded via the following link. We mapped 750 sites with liquefaction and lateral spreading using EO #earthquake #Turkey #Syria zenodo.org/record/7668401

@gpapatha

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Prof. Diego Melgar

@geosmx

Feb 20

Here's our kinematic model for the Türkiye doublet on a 3D geometry from HR-GNSS and strong motion. Penomenal effort by

@TuncayTaymaz

, Athanassios Ganas,

@bwcphd

and many others. This was a fast and furious multinational work with folks in Türkiye, Greece, and the US (1/n)

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Sigurjón (Sjonni) Jónsson

@Sjonni_KAUST

Feb 11

First results of 3D surface displacement derivation for the Turkey earthquake (from Sentinel-1 pixel offsets) showing ~8 m fault offset on the 2nd fault, but limited vertical motions. Processed by @JihongLiu4 at #KAUST, as part of the CDI and

@CES_KAUST

group efforts

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An interesting observation from #Sentinel2 optical displacement; significant displacement along the NNE-SSW Narli fault, close to the M7.7 #earthquake epicenter. Displacement mapping shows a previously unmapped ~5km section to the north of Narli F. 🧐twitter.com/SotisValkan/st

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Feb 9

Horizontal offset from the M7.7 #earthquake in the East Anatolian Fault Zone, #Turkey #Syria, using optical correlation with Copernicus #Sentinel2 satellite imagery. At least 250km of 1-5m displacement along the main EAFZ trace. Northern images are still obscured by snow. 1/2

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Feb 9

* repeated NNE-SSE stripe pattern is scanner artifact from Sentinel-2 sensor, not fault movement

The same North-South displacement field with fault trace overlay (from MTA 250K fault maps) 2/2

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#SatelliteImagery #Turkey #Syria

gCent

@gCentBulletin

Feb 8

M7.8 Turkey (2023.02.06) M7.5 Turkey (2023.02.06) earthquake.usgs.gov/earthquakes/ev earthquake.usgs.gov/earthquakes/ev Range and azimuth offsets ALOS-2 path 78, frame 2850-2890 Imagery courtesy of JAXA and facilitated by NASA

An updated version of fault offset along a ~13km splay section of EAFZ from the Feb 6 M7.7 #earthquake. Data not clean or accurate but offset follows mapped fault trace. Waiting for raw & new satellite images. post-eq imagery from

@Maxar

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Feb 8

A very crude first look of surface fault offset along the East Anatolian Fault trace from the Feb 6 M7.7 #earthquake. ~3m of North-South displacement & ~1m of East-West displ. Fast run with post-eq imagery from

@Maxar

satellite imagery #SatelliteImagery #Earthquake #Turkey #Syria

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Dec 4, 2022

According to modelled rockfall trajectories, it is evident that the proposed rockfall protection measures (i.e. catchment fences) should be installed at the first stages of the trajectory and not near the road where they are now 4/4

Validation of the selected trajectory was based on silent witnesses along the path of the rockfall and the impact (endpoint) on the road. Based on preliminary results, we can highlight the short time of the rockfall duration, approximately 8 sec 3/4

A rapid simulation of the rockfall trajectory was performed by our team (

@gpapatha

and Maria Taftsoglou) based on a preliminary point cloud. The volume of the detached block was considered as 100 m3 and the number of the trajectory simulations was 50 blocks 2/2

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On Thursday morning, December 1st, a boulder detached from a limestone rock cliff at approximately 230 m. elevation and landed on the Highway connecting Athens - Patras in Greece causing damage to two vehicles and partial road closure. 1/4

GeorgePapathanassiou

Copernicus EU

@CopernicusEU

Nov 16, 2022

#DYK that parts of the Greek islands 🇬🇷 move (horizontally↔️) at a velocity of several mm per year? You can monitor this phenomenon with the products of the

@CopernicusLand

European Ground Motion Service #EGMS 🆕The data can now be downloaded! More at land.copernicus.eu/news/the-europ

Ευρωπαϊκή Επιτροπή

and 9 others

Dave Petley

@davepetley

Nov 1, 2022

Satellite images captured by

@Planet

of the Kusiong landslides in the Philippines show multiple channelised debris flows in the catchments upstream of the communities:- blogs.agu.org/landslideblog/

read image description

ALT

Oct 31, 2022

Strike slip fault profile with nice drag structures, Thassos island.

Daan Beelen

@daanosaurus_rex

Oct 31, 2022

This man-made sediment basin nearby Perm, Russia shows the gradual construction of a 350m wide delta between 2015 and 2019, complete with channel avulsions and lobe shifts.

GIF

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A couple of fault scarps in Thassos island, from last visit. Pliocene conglomerate limestone & Palaeozoic gneiss

Risk and Resilience Assessment Centre DUTh

@riskacduth

Oct 20, 2022

Participation of the Geological Hazards Group of Risk and Resilience Assessment Center - ΚΕΔΙΑΚ ΠΑΜΘ in the 16th International Congress of the Geological Society of Greece with three presentations (GSG2022; October 17-19, 2022, Patras, Greece) #gsg2022

Land Portal Francais

@LandPortal_fr

Oct 10, 2022

Atlas #IGN des cartes de l'anthropocène landportal.org/fr/library/res

M Francesca Ferrario

@GingerFault

Oct 12, 2022

Please consider submit an abstract to #INQUARome2023 session #107 on surface faulting and earthquake damage during seismic sequences! Conveners:

NERC COMET

@NERC_COMET

Oct 11, 2022

COMET invites you to the next installment of our webinar series: Dr Ian Pierce (

@neotectonic

)

@OxUniEarthSci

presents 'Mountain building: insights from neotectonics' Wednesday 26th October 4pm UK, 3pm UTC, 5pm CEST, 8am PDT Register at: universityofleeds.zoom.us/webinar/regist

An experimental visualization of ground swaths from declassified spy satellite imagery.

Jon Engelsman

@engelsjk

Oct 6, 2022

Here's a visualization tool I've been working on to explore the global swath coverage of 1+ million declassified spy satellite images. keyhole.engelsjk.com 🧵

keyhole.engelsjk.com

KEYHOLE

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Congratulations to Maria Taftsoglou for her first paper: "A Detailed Liquefaction Susceptibility Map of Nestos River Delta, Thrace, Greece Based on Surficial Geology and Geomorphology". doi.org/10.3390/geosci

Dave Petley

@davepetley

Oct 5, 2022

The Cochin slide: a new paper published in the journal Landslides (Bijesh et al. 2022) describes a 138 km long, 240 cubic kilometre submarine landslide southwest of India:- blogs.agu.org/landslideblog/

High-resolution multibeam bathymetry map of the Cochin slide, from Bijesh et al. (2022). The black dashed line indicates the boundary of the slide scar, whilst the white dashed line indicates the boundaries of the landslide deposit. The colours indicate the water depth as per the key on the lower right side.

read image description

ALT

Risk and Resilience Assessment Centre DUTh

Oct 3, 2022

Presenting the first results for the landslide inventory of East Macedonia & Thrace region, Greece in the 9th International Conference on Civil Protection & New Technologies, #SafeThessaloniki 2022.

Simone Atzori

@SimoneAtzori73

Sep 28, 2022

First slip model (auto+revised) of the Mw 7.6 + Mw 6.8 #Michoacan #earthquake (#Mexico), from #Sentinel1 data inversion (#InSAR data in the cited tweet). With

. Thanks

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Fernando Monterroso

@maferp_13

Sep 28, 2022

Our Automatic @CopernicusEU #Sentinel1 processing of co-seismic interferogram and LOS Displacement map (Filtered results) for the Mw 7.8 and 6.8 earthquakes of Michoacan, Mexico

Track 114 (20220913S1A-20220925S1A) @SimoneAtzori73 @FraxInSAR @dott109 @claudiodeluca @CnrIrea

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Dave Petley

@davepetley

Sep 28, 2022

On 13 March 1961 the Kurenivka mudslide (sometimes called the the Kyrenivka mudslide) killed up to 1,500 people in the city of Kyiv in Ukraine. Reports of the tragedy were suppressed by the Soviet authorities:- blogs.agu.org/landslideblog/

The aftermath of the 13 March 1961 Kurenivka mudslide in Ukraine. Image from Radio Free Europe.

read image description

ALT

Sep 26, 2022

Tomb raiders; Mycenaean (Bronze Age) tholos tomb.

Whyjay Zheng

@WhyjayZ

Sep 23, 2022

ALOS-2 Interferograms for the Sept 17/18 M6.4/6.8 Earthquakes in Taitung, Taiwan. Data courtesy

@JAXA_en

Image courtesy Yunung Nina Lin, Hsin Tung, Chi-Hsien Tang / IES Taiwan #TaiwanEarthquake #earthquake

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Sep 22, 2022

An updated overview of co-seismic offset along Longitudinal Valley fault, September 18 M6.8 #earthquake in #Taiwan, using Copernicus #Sentinel2 imagery; >30km (?) of rupture along Longitudinal Valley. Northern and southern ends not clear due to heavy noise and cloud presence.

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Sep 22, 2022

Preliminary co-seismic offset along Longitudinal Valley fault, September 18 M6.8 #earthquake in #Taiwan, using Copernicus #Sentinel2 imagery; there is a ~1-2m left-lateral offset along the valley that roughly follows the mapped LV fault trace. E-W component not clear due to noise

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Andy Bliss

@glacierbliss

Sep 19, 2022

Amazing new landslide at Lamplugh Glacier 2022-9-17! Perspective view of the mountainous source area and the complex flow structures in the lobes of debris. The larger 2016 slide is visible lower right. Sentinel 2 image draped on DEM.