Greg McLaskey

Earthquake mechanics and seismology, Professor at @Cornell, m-scale laboratory earthquake experiments

[Greg McLaskey @GregMclaskey]

in case the previous link does not work:
"Earthquake Populations From Stochastic Stress Fields"
https://t.co/KGyrpkGktR

[Greg McLaskey @GregMclaskey]

I spent 15 years conducting laboratory earthquake experiments on faults that are unnaturally flat. But real earthquakes rupture fault zones that have complex architecture. This paper, https://t.co/h0A7mq0fwZ... just published in JGR, strives to address this disconnect.

[Greg McLaskey @GregMclaskey]

I didn’t invent this technique. I follow Ampuero, Ripperger, Mai, Dempsey, Suckale. Different from those studies, I don't use a flat-fault nucleation criterion (Dieterich1992; Uenishi&Rice2003; Rubin&Amp2005) because I believe it is inappropriate for most natural earthquakes.

[Greg McLaskey @GregMclaskey]

A main result of this study is that Δ𝜏_pot must be highly variable to produce a variety of earthquake sizes. The average Δ𝜏_pot might be close to 3 MPa, but it should vary drastically, from 25 MPa to -25 MPa. Almost all current earthquake models assume a much smoother Δ𝜏_pot.

[Greg McLaskey @GregMclaskey]

Or come check out presentations from my students Joseph Van Linn and Jun Young Song on Thursday afternoon at Sessions MR43B05 and MR44A06

[Greg McLaskey @GregMclaskey]

I’m looking for PhD students to join my research group and study earthquake mechanics. If you’re into lab experiments, signals, writing good science papers, and living near natural beauty, then perhaps my group would be a good fit. I’m at AGU! Message or email me and let’s meet!

[Greg McLaskey @GregMclaskey]

The article is completely free and open access. Thank you @WeAreSeismica!
https://t.co/wrhufW8kG4

[Greg McLaskey @GregMclaskey]

Very proud of my first Seismica publication! @WeAreSeismica. Led by @sblcebry, we focus on seismic implications of fault heterogeneity. Using lab experiments, we show that a patch locally high normal stress (a bump) can produce huge high frequency ground motions when ruptured.

[Greg McLaskey @GregMclaskey]

Two recent papers on impermanent barriers to earthquake rupture propagation: an experimental study coming from my lab with @sblcebry here: https://t.co/psnuMyyDs5 and a modelling study from @diego_mo_om and @DocTerremoto here: https://t.co/EHbxH2nOYm

[Greg McLaskey @GregMclaskey]

@XRupture @hueyke @dave_kammer I presented at SCEC 2021 after 1 revision thinking it’d be published soon, but I misjudged the frustratingly slow and indecisive Nature Geoscience. 6 reviewers, and 14 months later, it is published in NatureComm

[Greg McLaskey @GregMclaskey]

Our paper on delayed triggering and slow fronts in lab experiments is now out in @NatureComms. A collaboration with Sara Cebry, @hueyke, Chris Marone, Sharan Shreedharan and @dave_kammer:

https://t.co/N33XzwSQeq

Using hybrid samples, we directly observe asperity interactions.

[Greg McLaskey @GregMclaskey]

@XRupture @NatureComms @hueyke @dave_kammer Thanks Shiqing, I will check out the paper.

[Greg McLaskey @GregMclaskey]

For me, Cornell University (Ithaca, NY, USA) has been a great place to live and work.
Please retweet/distribute widely.

[Greg McLaskey @GregMclaskey]

Job Alert: Multiple hires in my department this year in the areas of “Mechanics/Geomech/Structural Eng” https://t.co/fAOgPsNY2m and “Cyber-Phys Systems for Smart-City Infrastructure” https://t.co/geS4Du7wQ0 These positions are open to all ranks (assist/assoc/full prof).

[Greg McLaskey @GregMclaskey]

@Geolojen Carole King - I Feel the Earth Move.
https://t.co/5eqwas77KP

[Greg McLaskey @GregMclaskey]

We show how initial stress levels affect the propagation of fluid-induced aseismic slip, the transition to dynamic rupture, and the overall rupture extent. And the sample is large enough that both the first and second authors are in Fig1a!

[Greg McLaskey @GregMclaskey]

I’m happy to share that Sara’s paper on fluid injection into a 3-m rock is now online in JGR
https://t.co/Pz4dwQgpXi
I’m super proud!