@rangefront

Earthquake geologist, husband, dad, beer-n-pistachios vegan and I believe it's jogging or yogging. Tweets are my own.

 Golden, Colorado, USA
Joined August 2009
  • Tweets2.3K
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  • Followers1.3K
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Quick recap from field suvey of yesterdays M5.8 earthquake in NV. no surface rupture observed after several transects across aftershock pattern.  Lack of surface cracking in epicentral area. Minor bank failures, lateral spread, and liquefaction features along Walker river.
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Precise, NLL-SSST-coherence earthquake relocations for the 2023 Mw7.8 and Mw7.6, Kahramanmaraş-Gaziantep, Turkey earthquake sequence (including 2020 Mw 6.8 Elazığ, Turkey sequence). Seismic arrival data from @AFADBaskanlik. Details & catalog available at: doi.org/10.5281/zenodo.76998…
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Todays big rupture 7.8 m of concrete wall. Also, displacement cutting off a drainage ( classic shutter ridge)
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Uphill facing fault plane, faulted terrace with thrashed village in background, and ruptures extending along linear valley .
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Rich Briggs retweeted
Sinan Akciz@snnkcz24 Feb 2023
Check out Offset rock mound by quakedr in #3D, #VR or #AR skfb.ly/oEtRF via @sketchfab we are chasing the end points of the 7.6 eq. This displaced rock mound is near the NE end. @akyuz24 @CengizZabci @tsancar @DrWendyRocks @rangefront @mrbrianolson @Stef_EQ_Geology
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Rich Briggs retweeted
SSA@SeismoSocietyAm21 Feb 2023
We're offering a series of one-hour Virtual Mentoring Sessions for #SSA2023 First up on 1 March: How to Network at Meetings, with @USGS Rich Briggs, Joan Gomberg, Andrew Michael and David Wald and @PNSN1 Mouse Reusch Sign up here: bit.ly/2zXQmd6
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Rich Briggs retweeted
steved@delipshnit16 Feb 2023
Job Alert! If you are interested in a postdoc position focused on the use of optical imagery to study plate boundaries with @USGS_Quakes @NASAJPL @SESEASU contact research advisors and discuss a proposal: usgs.gov/centers/mendenhall-… #earthquake #usgs #tectonics
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Replying to @delipshnit @USGS_Quakes @NASAJPL @SESEASU
We're hiring a postdoc! Contact the research advisors to discuss projects prior to applying, or just to get more info. We don't bite! Application closes April 17 @ChelseaPScott @ramonarrowsmith @gCentBulletin usgs.gov/centers/mendenhall-…

S63. Advancing understanding of plate-boundary processes using high resolution imagery and topogr...

We are seeking a Mendenhall Fellow to advance our ability to use high resolution topographic data, with emphasis on optical imagery, to increase understanding of natural hazards. Closing Date - April...

usgs.gov
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Rich Briggs retweeted
gCent@gCentBulletin8 Feb 2023
M7.8 Turkey (2023.02.06) M7.5 Turkey (2023.02.06) earthquake.usgs.gov/earthqua… earthquake.usgs.gov/earthqua… Range and azimuth offsets ALOS-2 path 78, frame 2850-2890 Imagery courtesy of JAXA and facilitated by NASA
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I was diagnosed with cancer in April. Unfortunately, chemotherapy, radiation, and immunotherapy couldn’t tame this, and my medical team is now focused on keeping me comfortable while I spend the last chapter of my life with my partner, family, and friends. 1/4
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For a long time geoscientists have been quoting M7.5 for the 1770 Haiti earthquake, but based on fairly cursory earlier analysis of mostly secondary sources. A new study based on detailed original sources sheds new light on this important event. 1/ pubs.geoscienceworld.org/ssa…
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📣new paper📣 Precipitation rate is a major control on the observed decay in preservation of large, cumulative offsets on strike-slip faults @KlingerYann @rangefront @runr447 & I explore at doi.org/10.1130/G50393.1
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Because we all use offset markers in active tectonics studies it is critical to understand what is controling their formation and preservation. Check out the new paper by N. Reitmann et al. about offsets along strike-slip faults pubs.geoscienceworld.org/gsa…
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Rich Briggs retweeted
Tina Dura@diatomdura8 Dec 2021
Our new research in @NatureComms shows sea-level rise exposes the Ports of Los Angeles and Long Beach to higher impacts from Alaskan tsunamis. By 2100, a tsunami from a M8 Alaskan earthquake causes similar impacts in CA to waves from an Alaskan M9.1 today. rdcu.be/cCQl7
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Rich Briggs retweeted
NWS Boulder
@NWSBoulder21 Aug 2021
Great advice from our weather savvy friends in Larimer County. #KnowBeforeYouGo #COwx
Canyon Lakes Ranger RD@usfsclrd21 Aug 2021
Yesterday morning, snow fell in the Deadman area northwest of Red Feather Lakes. Be prepared for changing weather in Colorado this time of year! #KnowBeforeYouGo @NWSBoulder #cowx
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Post-seismic slip (2-3 cm LOS) along a 15km section of Enriquillo-Plantain Garden Fault, plus a secondary 6km fault to the NW, just east of the Aug 14 M7.2 Haiti coseismic rupture. Copernicus #Sentinel1 interferogram (LOS displacement) Desc Aug15-Aug21, processed at @Ak_Satellite
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A 1.5m resolution #lidar digital terrain model (DTM) covering the Tiburon Peninsula, Haiti 🇭🇹 is now available via OpenTopography: doi.org/10.5069/G9GX48R8 We are redistributing this data to aid the recovery efforts for the August 14th, 2021 M 7.2 Haiti #earthquake.
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#Haitiearthquake2021 surface deformation map derived from #InSAR with Copernicus Sentinel-1 data acquired on 15 August has been posted on JPL Photojournal: go.nasa.gov/3k5BoVw Land near epicenter moved upward and eastward about 40 cm with more motion to the west.
map of surface displacements for Haiti Earthquake showing strong motion upward and eastward near epicenter

ALT map of surface displacements for Haiti Earthquake showing strong motion upward and eastward near epicenter

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Now Susanville is in the path of the #DixieFire apnews.com/article/fires-env…
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Time lapse of #DixieFire at Janesville, CA near Honey Lake rest stop from around 7 PM to 9 PM PST @wildfirecenter @FireWeatherLab
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