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Jason R. Patton boosted
Shunsuke Takemura

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, doi.org/10.1093/gji/ggac449

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Jason R. Patton boosted
Steven Beschloss

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.

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Jason R. Patton boosted
Jascha Polet

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)

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Jason R. Patton boosted
Tim Dawson

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?

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Jason R. Patton boosted
Rebecca Barnes

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 colorado.edu/instaar/instaar-r

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Jason R. Patton

for M 6.9 offshore of

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

*in area absent of GPS/microatoll data

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

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Jason R. Patton boosted
Kate Pedley

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

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Jason R. Patton

for M 6.9 offshore of

appears to be a megathrust subduction zone fault earthquake

generated a small tsunami recorded on tide gages

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

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Jason R. Patton

for M6.9 offshore of

Appears to be on the megathrust subduction zone fault

Read more about the regional tectonics here

earthjay.com/?p=5733

earthquake.usgs.gov/earthquake

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Jason R. Patton boosted
Raphael Grandin

@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: earthquake.usgs.gov/earthquake.

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Jason R. Patton boosted
Raphael Grandin

@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 pubs.er.usgs.gov/publication/7

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Jason R. Patton boosted
Raphael Grandin

@SakuRainbow @earthjay This #USGS educational material may also help : usgs.gov/programs/earthquake-h. 👍

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Jason R. Patton boosted
Raphael Grandin

@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

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Jason R. Patton

for in 2019

M7.1 offshore of

fascinating subduction dipping both east & west

generated modest

read more: regional tectonics, seismic hazard/risk
earthjay.com/?p=9106

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Jason R. Patton boosted
elena perez

puppet lunch time, but you can only invite one:

23 people · Nov 15, 2022, 00:17
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Jason R. Patton boosted
Chris Walter

Yesterday, I saw a Content Warning (CW) for FORTRAN.

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Jason R. Patton

for M 6.2 offshore of

At overlap area of 1960 & 2010 aftershock areas probably along megathrust

Felt intensity of MMI 7

Read more in report focusing on 2010 M 8.8 earthjay.com/?p=5111

earthquake.usgs.gov/earthquake

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Jason R. Patton boosted
Wendy Bohon, PhD

In 2015, a M7.8 earthquake occurred in Nepal. This video from IRIS (narrated by me) explains this #earthquake, as well as the seismic hazard and risk for #Nepal and #India.

m.youtube.com/watch?v=5VjaSFEf

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Jason R. Patton boosted
Wendy Bohon, PhD

For my PhD I worked on understanding the uplift of the Southwestern margin of the Tibetan Plateau, focusing on the Karakoram and Longmu Co fault systems and surround mountain ranges.

These are right and left lateral strike slip fault systems (respectively) that are helping to accommodate the motion between #India and Eurasia.

Here’s an open source paper that gives some background. pubs.geoscienceworld.org/gsa/g

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Jason R. Patton boosted
Dave Walker

Mastodon tips (brief)

1. Server choice - tricky
2. Add a pic and bio
3. I prefer 'Advanced web interface'
4. And the 'Light' theme
5. Listen to long-time users
6. Tip your server admins
7. Hashtags pretty important
8. Put Alt text on pics
9. Use Content Warning if in doubt
10. Pin introduction post
11. Do some boosting
12. Follow interesting people
13. Hashtags can be followed too
14. DMs not secure
15. Be respectful
16. Thank you, people who run this

#mastodon #tips #MastodonTips #tootorial

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