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@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

@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

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

puppet lunch time, but you can only invite one:

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

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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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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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

Maybe you haven't heard of Shiveluch on the Kamchatka Peninsula in Far Eastern Russia, but it is one of the most explosive and active volcanoes on the planet. In today's post you can check out some excellent satellite images by Planet that show the results of some recent dome collapses and explosions from this Russian volcano.

discovermagazine.com/planet-ea

@lithospheric oooh I’ll play along with this one 😅

Here’s a little one from northern Alabama.

My #introduction: Hi everyone, my name is Jack, and I am a #geoscience #PhD student at The University of Queensland, #Australia. In my PhD research, I seek to explain why "weird" #volcanoes exist in East Asia and Indonesia. To do so, I (1) analyse the composition of rocks erupted at these volcanoes to determine how they formed and (2) use earthquakes to model the structure of the upper 660 km of Earth. I am passionate about all aspects of #science and am excited to learn from everyone else here!

Starting the new season of #TheCrownNetflix. I’m so excited. No spoilers!

This is a helpful overview of why the search feature is intentionally limited

midrange.tedium.co/issues/how-

And it links to this thoughtful blog post on why the influx of new people on Mastodon has been so jarring to the community already here

hughrundle.net/home-invasion/

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Who can see your toots? Whose toots can you see? Found this clarifying graphic at axbom.com/mastodon-tips/

The best way to increase everyone's feed diversity is to go follow interesting accounts on other instances :)

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