**Jason R. Patton** · Nov 19, 2022, 01:12

Jason R. Patton

Jason R. Patton @earthjay@qoto.org

409 Posts

182 Following

313 Followers

eq Reports: https://earthjay.com

Twitter: https://twitter.com/patton_cascadia

lover of mud, sand, gravel, chocolate and Earthquake Reports at https://earthjay.com

Joined Nov 2022

182 Following 313 Followers

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**Shunsuke Takemura** @takeshun1984@mstdn.jp · Nov 19, 2022, 01:12

Nov 19, 2022, 01:12

Shunsuke Takemura @takeshun1984@mstdn.jp

Tectonic stress change due to the 2011 Tohoku earthquake inferred from long-term CMT data of regular earthquakes

Toshiko Terakawa, Mitsuhiro Matsu'ura, Tectonic stress fields inferred from long-term CMT data ranging over different periods, Geophysical Journal International, 2022;, ggac449, https://doi.org/10.1093/gji/ggac449

**Jason R. Patton** · Nov 19, 2022, 01:10

Jason R. Patton boosted

**Steven Beschloss** @StevenBeschloss@toot.community · Nov 19, 2022, 01:10

Nov 19, 2022, 01:10

Steven Beschloss @StevenBeschloss@toot.community

It's hard to overstate how much fuel the failure of the DOJ to hold the former WH occupant accountable for his role in the Jan. 6 insurrection & theft of classified documents (among others) causes the MAGA crowd to aggressively assert he's done nothing wrong. That is: No charges=No Crimes.

**Jason R. Patton** · Nov 18, 2022, 15:42

Jason R. Patton boosted

**Jascha Polet** @jascha@mastodon.social · Nov 18, 2022, 15:42

Nov 18, 2022, 15:42

Jascha Polet @jascha@mastodon.social

Today’s M6.9 shallow #megathrust #earthquake (approximate location as purple blob) in the context of the #rupture areas of (numerous) previous #subduction events near #Sumatra on a map from Putra et al. (2016)

21d5c3da1ce5771e.jpg

**Jason R. Patton** · Nov 20, 2022, 03:37

Jason R. Patton boosted

**Tim Dawson** @timblor@scicomm.xyz · Nov 20, 2022, 03:37

Nov 20, 2022, 03:37

Tim Dawson @timblor@scicomm.xyz

Testing out this platform. Do video clips of lava work? Here is one I shot from Iceland last year. Is it a still or video?

510091a5f2ae6481.mp4

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 07:36

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 07:36

Nov 20, 2022, 07:36

Jason R. Patton @earthjay@qoto.org

@timblor on app. Started moving after a few secs.

**Jason R. Patton** · Nov 20, 2022, 03:35

Jason R. Patton boosted

**Rebecca Barnes** @Waterbarnes@mastodon.social · Nov 20, 2022, 03:35

Nov 20, 2022, 03:35

Rebecca Barnes @Waterbarnes@mastodon.social

The brilliant Dr Sarah Crump passed away peacefully on Friday - Sarah #inspired so many of us and to further her #legacy #INSTAAR has started a #fellowship in her name to help future students #arctic #alpine Please consider giving if you can https://www.colorado.edu/instaar/instaar-resources/student-funding/sarah-crump-graduate-fellowship

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 07:31

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 07:31

Nov 20, 2022, 07:31

Jason R. Patton @earthjay@qoto.org

@halubch@masto.ai you're welcome!

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 02:14

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 02:14

Nov 20, 2022, 02:14

Jason R. Patton @earthjay@qoto.org

#EarthquakeReport #EarthquakeToot for M 6.9 #Gempa #Earthquake offshore of #Sumatra #Indonesia

probably slip along megathrust subduction zone where Chlieh modeled low seismogenic coupling https://doi.org/10.1029/2007JB004981

*in area absent of GPS/microatoll data

read more here:
https://earthjay.com/?p=10545

3ea3ab6bca08814a.jpeg

**Jason R. Patton** · Nov 20, 2022, 02:13

Jason R. Patton boosted

**Kate Pedley** @KPedleyGeo@mastodon.nz · Nov 20, 2022, 02:13

Nov 20, 2022, 02:13

Kate Pedley @KPedleyGeo@mastodon.nz

My most well known photo from the field, and well timed being very nearly the anniversary of the 2016 Kaikoura Earthquake sequence. This is the "Wall of Waiau" on the Leader fault. This scarp is actually a bit of a quirk of nature, no prior rupture here and effective localised normal movement due to topography on an oblique thrust and right lateral fault.
#geology #fault #earthquake #photography #EarthScience #nz

858ceffb4255612b.jpg

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 00:44

**Jason R. Patton** @earthjay@qoto.org · Nov 20, 2022, 00:44

Nov 20, 2022, 00:44

Jason R. Patton @earthjay@qoto.org

#EarthquakeReport #EarthquakeToot for M 6.9 #Gempa #Earthquake offshore of #Sumatra #Indonesia

appears to be a megathrust subduction zone fault earthquake

generated a small tsunami recorded on tide gages

read more here:
https://earthjay.com/?p=10545

**Jason R. Patton** @earthjay@qoto.org · Nov 18, 2022, 14:34

**Jason R. Patton** @earthjay@qoto.org · Nov 18, 2022, 14:34

Nov 18, 2022, 14:34

Jason R. Patton @earthjay@qoto.org

#EarthquakeReport #EarthquakeToot for M6.9 #Gempa #Earthquake offshore of #Sumatra #Indonesia

Appears to be on the megathrust subduction zone fault

Read more about the regional tectonics here

https://earthjay.com/?p=5733

https://earthquake.usgs.gov/earthquakes/eventpage/us7000iqpn/executive

**Jason R. Patton** · Nov 13, 2022, 11:22

Jason R. Patton boosted

**Raphael Grandin** @RaphaelGrandin@social.linux.pizza · Nov 13, 2022, 11:22

Nov 13, 2022, 11:22

Raphael Grandin @RaphaelGrandin@social.linux.pizza

@SakuRainbow @earthjay Interestingly, you can look at different solutions for the the same earthquake (M7.3 #Tonga shallow #earthquake of 11 Oct), depending on the inversion method: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ip0l/moment-tensor.

**Jason R. Patton** · Nov 13, 2022, 11:14

Jason R. Patton boosted

**Raphael Grandin** @RaphaelGrandin@social.linux.pizza · Nov 13, 2022, 11:14

Nov 13, 2022, 11:14

Raphael Grandin @RaphaelGrandin@social.linux.pizza

@SakuRainbow @earthjay Actually, the rounded parts show that the moment tensor is not 100% consistent with pure slip on a planar fault ("pure double couple"). But maybe 10% is unexplained. The rest can be due to 1/ uncertainty in the inversion, 2/ actual complexity of the rupture (multiple faults activated, roughness of the fault...) or 3/ volume change (e.g. when magma is involved). #SCARDEC assumes a pure fault plane, whereas #USGS leaves more freedom to inversion. See https://pubs.er.usgs.gov/publication/70020193

**Jason R. Patton** · Nov 13, 2022, 10:59

Jason R. Patton boosted

**Raphael Grandin** @RaphaelGrandin@social.linux.pizza · Nov 13, 2022, 10:59

Nov 13, 2022, 10:59

Raphael Grandin @RaphaelGrandin@social.linux.pizza

@SakuRainbow @earthjay This #USGS educational material may also help : https://www.usgs.gov/programs/earthquake-hazards/focal-mechanisms-or-beachballs#:~:text=A%20focal%20mechanism%2C%20or%20%22beachball,of%20the%20fault%20that%20slipped. 👍

**Jason R. Patton** · Nov 13, 2022, 10:20

Jason R. Patton boosted

**Raphael Grandin** @RaphaelGrandin@social.linux.pizza · Nov 13, 2022, 10:20

Nov 13, 2022, 10:20

Raphael Grandin @RaphaelGrandin@social.linux.pizza

@SakuRainbow @earthjay Here is the same earthquake analysed by #Geoscope. The 1st image shows the focal mechanism. This is a stereographic projection of 4 quarter-spaces: ◻️ is the region where the rupture radiates tensional ⏪⏩ waves, ◼️ is where compressional waves ⏩⏪ are radiated. What you need to care about is the limit between ◻️ and ◼️: it corresponds to the two *possible* planes, which are perpendicular ❌. Both planes are depicted in 2nd figure

**Jason R. Patton** @earthjay@qoto.org · Nov 14, 2022, 05:20

**Jason R. Patton** @earthjay@qoto.org · Nov 14, 2022, 05:20

Nov 14, 2022, 05:20

Jason R. Patton @earthjay@qoto.org

@skanman it is never too late to learn more about something we are fascinated by or are interested in. i didn't start my phd program until i was almost 37. be wll!