Erin McEwan
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earthscierin.bsky.social
Erin McEwan
@earthscierin.bsky.social
Tectonic-fluvial geomorphology PhD candidate researching fault and river interactions. Breast cancer survivor and lover of rocks, fossils, and hiking.
Pinned
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...
Recently while out exploring my husband pointed out this fault exposed in the cliffside. Today he showed me a picture of something he saw whole working, using a banana for scale. He said he's learned to always use a scale from me. I think I've actually turned him into a geologist 😅 #geology 🧪 🛠️
July 8, 2025 at 12:13 AM
This review paper is a fascinating read for those interested in land surface hazard cascades.
New in @science.org: Natural hazards aren’t “one and done.” They alter the landscape, changing the likelihood of follow-on events. We argue there’s an urgent opportunity for geomorphologists—working with other disciplines—to better understand and forecast cascading hazards.
Cascading land surface hazards as a nexus in the Earth system
This Review synthesizes progress and outlines a new framework for understanding how land surface hazards interact and propagate as sediment cascades across Earth’s surface, influenced by interactions ...
www.science.org
June 29, 2025 at 1:47 AM
A textbook example of how strike slip faults can partially or even fully 'behead' smaller channels. This often forms a characteristic deflection reach along the fault, and sometimes even spurs an avulsion. Amazing footage indeed, but my heart aches for those affected.
Absolutely amazing video. Direct displacement of a drainage/channel: it is possible to see a right lateral displacement of the thalweg of about 1.5 to 2 m. It is also possible to see the fault plane exposed!
Credit: okarun011 on TikTok
April 2, 2025 at 12:51 AM
Reposted by Erin McEwan
Our blog has been a bit quiet over these winter months, but I have added a new article describing our recent trip to Morocco, working with scientists from Mohammed V University in Rabat to understand more about earthquake sources around the Atlas mountains.

quakesincentralasia.org/research-upd...
Earthquakes in North Africa: a reconnaissance of active faulting along the margins of the Atlas mountains of Morocco – Earthquakes in Central Asia
quakesincentralasia.org
March 7, 2025 at 7:02 PM
Reposted by Erin McEwan
These are the latest papers on paleoseismology, active tectonics, and archaeoseismology (Feb 2025)

paleoseismicity.org/new-papers-o...
» New papers on paleoseismology, active tectonics, and archaeoseismology (Feb 2025)
paleoseismicity.org
February 2, 2025 at 7:15 PM
In 2016 the Papatea fault ruptured, where ~6.5m of fault uplift diverted the river into a new course, scouring out this ~250-400 m wide avulsion channel (footage taken in 2021). Note the white truck sitting on top of the Papatea fault scarp for scale. 🧪 #geology #geomorphology #womeninSTEM
February 1, 2025 at 10:33 PM
@paleoseismicity.bsky.social has been kind enough to publish a short blog post outlining some of the key points from our most recent paper on Coseismic River Response. Check it out if you are interested 😁
Read here about an important new paper by McEwan et al. – Seismic hazard and shifting channels: Exploring coseismic river response

paleoseismicity.org/new-paper-by...
» New paper by McEwan et al. – Seismic hazard and shifting channels: Exploring coseismic river response
paleoseismicity.org
January 31, 2025 at 10:34 PM
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...
January 16, 2025 at 9:28 PM
This picture of me finding a crab fossil is a good representation of what my face looked like this morning after finding out my 2nd paper has been accepted. Very happy 😁 #geology #womeninSTEM
January 8, 2025 at 11:49 PM
I decided to leave no stone unturned and make my own #geology themed birthday cake this year. I think it turned out pretty gneiss? All components are 100% edible, so the guests could literally lick rocks if they wanted 😅
January 4, 2025 at 10:47 PM
The best part of this are the comments. Absolute gold 😅
⚒️Asked ChatGPT to "draw a picture of a subduction zone".
Some absolutely fantastic stuff in here... the more you look the better it gets. Gonna show this to my intro class and have them list "ten things wrong" with this picture.

HINT: its pretty much all wrong😂
January 2, 2025 at 10:31 PM
I couldn't not take a photo of this beautiful stratigraphy while assisting with a fieldtrip out in Castle Hill Basin earlier this year. What a story this outcrop has to tell ❤️ #geology #earthscience #womeninSTEM #fieldwork
December 11, 2024 at 9:33 PM
For today's (somewhat late) #Fridayfold, I'm going smaller in scale. Here are some beautiful soft sediment deformation structures I spotted when exploring the Oamaru volcanic field #geology #earthscience #womeninSTEM
December 6, 2024 at 6:49 PM
This unassuming river terrace is actually the Kekerengu fault. In 2016, ~2.5 m of fault throw uplifted a large section of the Waiau Toa /Clarence riverbed, exposing the underlying bedrock and this beautiful erosion surface. Geomorphology in action! #geomorphology #earthscience #geology #womeninSTEM
December 3, 2024 at 12:11 AM
It's Friday fold time! Earlier in the year some of our dept completed a rafting trip down the beautiful Waiau Toa / Clarence River, where we were treated to these beautiful chevron fold outcrops. Very cool! #foldfriday #geoscience #womeninSTEM
November 28, 2024 at 8:31 PM
Reposted by Erin McEwan
Spending my lunch break perusing Dan Coe's gorgeous Lidar data meander river reconstructions 😍
dancoecarto.com/4k-rivers ⚒️ 🐡
November 24, 2024 at 5:51 PM
Throwback to one of the coolest moments of my life - standing on the Alpine Fault plate boundary. The minty green cataclasite is the Pacific Plate, where it is overriding the brownish quarternary gravels of the Australian Plate. Absolutely amazing ❤️ #geology #tectonics #geoscience #womeninSTEM
November 21, 2024 at 10:52 PM
Love this! Such a fun idea 😁
September 1, 2024 at 10:06 AM