Lightnews — Scholar-powered news

Reposted by Rich Briggs

Morgan Moschetti @morganmp.bsky.social · Apr 2

“Earthquakes and the damage they cause are apolitical… we either prepare for future earthquakes or the population eventually pays the price... In the U.S., this preparation hinges in large part on the expertise of scientists and engineers in federal agencies…”

theconversation.com/us-earthquak...

US earthquake safety relies on federal employees’ expertise

The US experiences violent earthquakes, but the damage and death toll is much lower than in many countries because of the work of federal seismologists and engineers.

theconversation.com

11 30

Reposted by Rich Briggs

Gareth Funning @gfun.earth · Apr 2

The whole #MyanmarEarthquake rupture in one interferogram! This is three consecutive wide swath frames of ALOS-2 data, provided by JAXA through agreement with NASA. The line-of-sight (LOS) is ~perpendicular to fault strike, so most of what you see is vertical motion at bends and steps of the fault.

A radar interferogram covering 17.5 to 23.5 degrees north, in Myanmar. Tightly clustered fringes delimit the likely 2025 earthquake rupture zone.

3 28 88

Rich Briggs @rangefront.bsky.social · Apr 2

USGS Myanmar earthquake remote surface rupture obervations 🔁REFRESH🔁

doi.org/10.5066/P1RY...

Offsets from Sentinel2 and Landsat pixel tracking ➡️ (slip blip at southern end; the rupture that can’t stop won’t stop)

On-fault offsets from high-res imagery ➡️ more detailed fault mapping

Mw 7.7 Myanmar fault offsets from pixel tracking and hi-res image interpretation

Mw 7.7 Myanmar fault surface traces from hi-res image interpretation

2 8

Reposted by Rich Briggs

Dr. Judith Hubbard @judithgeology.bsky.social · Apr 1

⚒️ 🧪

New satellite imaging of the Myanmar earthquake area confirms that the rupture was unusually long: ~500 km.

We discuss the data, the rupture, and the implications, in our latest post.

earthquakeinsights.substack.com/p/surface-ru...

Surface ruptures of the Myanmar M7.7 earthquake mapped from space

An extremely long rupture is confirmed

earthquakeinsights.substack.com

4 43 98

Reposted by Rich Briggs

Dr. Eric J. Fielding, PhD @ericfielding.mastodon.social.ap.brid.gy · Apr 1

NASA JPL ARIA project analysis of data from Copernicus Sentinel-2 optical and Sentinel-1 radar images measured the slip on the Sagaing Fault in Myanmar. Quick preliminary map. More details later. Fault ruptured about 500 km (300 miles) in the magnitude 7.7 […]

[Original post on mastodon.social]

Map of Myanmar area showing sharp color change along the fault running roughly north-south. Red on west side where land moved northward.

1 26 51

Rich Briggs @rangefront.bsky.social · Apr 1

Remote surface rupture observations for the M7.7 2025 Myanmar earthquake - soft rollout!

doi.org/10.5066/P1RY...

Simple fault trace and slip distribution from pixel tracking, high-res from available imagery. Watch for updates!

⚒️ USGS and collaborators effort led by @nadinegrr.bsky.social 🙏

Screenshot of Myanmar M7.7 surface rupture map service

24 51

Rich Briggs @rangefront.bsky.social · Mar 30

Friday afternoon imagery session, missing @nadinegrr.bsky.social who was busy working the phones

1 1 12

Rich Briggs @rangefront.bsky.social · Mar 30

Heartfelt thanks to the USGS crew and others (especially @wangyu-1979.bsky.social) for working hard behind the scenes the last few days to confirm the loooong Myanmar rupture for the response products. Surface rupture imagery is bonkers. What a tragedy for the folks there, sending ♥️💔♥️

1 16

Rich Briggs @rangefront.bsky.social · Dec 18

Boom what a team 🤜🏼🤛🏼

1

Reposted by Rich Briggs

faultcreeper.bsky.social @faultcreeper.bsky.social · Dec 18

Magical INSAR led us to rupture from the M5.8 Parker Butte Nevada earthquake. 1.5 km of surface rupture, right lateral, max offsets 2-5 cm, on NNW plane. Conjugate to NE trending aftershocks.

4 12 49

Reposted by Rich Briggs

Nevada Seismological Laboratory @nvseismolab.bsky.social · Dec 16

Curious about what the NVseismolab gets up to? Check out this video and follow us on Instagram for more behind the scenes action! 👉 www.instagram.com/share/BAV7Q5...

1 4 20

Reposted by Rich Briggs

Rob Langridge @aotearoa-unzpd.bsky.social · Dec 16

New trench excavated across the Alpine Fault at Blue Grey River. Definitely reverse dominant at this site. Thanks to @jameslagreca.bsky.social and Liv for their hard work. We were lucky with weather but eventually chased off by torrential rain.

2 20

Reposted by Rich Briggs

Yann Klinger @yklinger.bsky.social · Dec 16

⚒️ Looking for a PhD in numerical modeling about earthquake cycle and surface deformation using Discrete Element Modelling?
Join us at IPGP, open position to start next Fall 2025.
Possibilities of funding for master internship prior to PhD if needed.

For information and application, just email me.

4 4

Reposted by Rich Briggs

Yann Klinger @yklinger.bsky.social · Dec 16

⚒️ If you are puzzled by shallow slip deficit during strike-slip earthquakes, maybe diffuse deformation is part of the answer.
S. Antoine et al. revisited the Ridgecrest earthquake and got ride of almost all of the SSD by better accounting for off fault deformation.
dx.doi.org/10.1029/2024...

1 6 23

Rich Briggs @rangefront.bsky.social · Dec 13

Ha, keeping with the theme - made me drag this one out

1 18

Rich Briggs @rangefront.bsky.social · Dec 11

Nice work crew! 🩵🤎Nevada💚💙

1

Reposted by Rich Briggs

Christie Rowe @keepitrheol.bsky.social · Dec 11

SPOILER ALERT: Went out to collect perishable data around yesterday's M5.8 epicentral region. Preliminary results: Nobody feels aftershocks when @faultcreeper.bsky.social is driving. Afternoon frozen slushy river makes for extremely cool co-seismic features (new types? to document!). 1/2

1 3 20

Rich Briggs @rangefront.bsky.social · Dec 11

Ok Nevada, don’t start any of this conjugate faulting stuff. Stay chill little bro

Aftershocks of the 9 Dec 2024 M5.8 extending SE from the original trend

4

Reposted by Rich Briggs

Nevada Seismological Laboratory @nvseismolab.bsky.social · Dec 10

Shout out to our field team who worked all night setting up temporary seismic stations near the epicenter of the ML 5.8 earthquake NNE of Yerington so we can better monitor aftershock activity.

3 10 68

Rich Briggs @rangefront.bsky.social · Dec 10

Great post! Wabuska . . .ish? The aftershocks currently line up 5+ km south of the scarps mapped by Li et al. But yeah, it’s a complex distributed feature. We didn’t include the lineament in the 2023 NSHM update because of the considerable uncertainties in location, but it’s worth revisiting!

2

Reposted by Rich Briggs

Nevada Seismological Laboratory @nvseismolab.bsky.social · Dec 9

A shaky day for us here in Nevada with a M5.5 earthquake NNE of Yearington at 3:08pm. Did you feel the shaking? Report it here earthquake.usgs.gov/earthquakes/...

The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.

earthquake.usgs.gov

4 13 40

Rich Briggs @rangefront.bsky.social · Dec 10

Cool little blob of preceding seismicity

www.seismo.unr.edu/Earthquake

Oh and USGS has the Event Sequence tool now 🤜🏼🤛🏼 (link is fugly, scroll down at earthquake.usgs.gov/earthquakes/...

Ok cute little Monte Cristo-ish sequence, time to die down 😹

Rich Briggs @rangefront.bsky.social · Dec 9

Nice stuff @nvseismolab.bsky.social 🙌🏽👊🏼

1 1

Rich Briggs @rangefront.bsky.social · Dec 9

Nevada doing Nevada things - likely l-l s-s on unmapped NE trending structure near Desert Mtns. Mw 5.5 earthquake.usgs.gov/earthquakes/... Screenshots lol

1 1

Reposted by Rich Briggs

Rob Langridge @aotearoa-unzpd.bsky.social · Nov 24

An exciting PhD opportunity has come up w/ the Ngā Ngaru Wakapuke program in"Understanding earthquake sequences using near- and on-fault
paleoseismology on the western Marlborough Fault System". To work with leading paleoseismologists from VUW (J Howarth) & GNS. Contact [email protected] for pdf

2 17 28