Rich Briggs

2.3K posts

Rich Briggs

@rangefront

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

Golden, Colorado, USA 가입일 Ağustos 2009

247 팔로잉1.3K 팔로워

Rich Briggs 리트윗함

Rich Koehler@faultcreeper·11 Ara

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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Rich Briggs@rangefront·12 Mar

@lichrend @USGS_Quakes I 💚💙❤️ the Great Sand Dunes too! But this is Borah Peak in Idaho, and the scarp from the 1983 Lost River fault rupture is that little thin white line across the photo. Mountain up valley down (valley mostly down in fact - agupubs.onlinelibrary.wiley.com/doi/abs/10.102…)

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USGS Earthquakes@USGS_Quakes·11 Mar

Job alert 🚨 Do you love active tectonics, GIS, fieldwork, data analysis, and working in a team? USGS Golden is hiring a geologist! See this link for job details and application information: #summary" target="_blank" rel="nofollow noopener">usajobs.gov/job/780739200#…

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Rich Briggs@rangefront·12 Mar

Please consider applying - there have been some amazing geologists in this position over the years! including @collett_camille @FaultyAndSalty @nadinegrr @faultjumper oh and Golden isn't a bad place to spend some time 🏔️🌻🚵‍♀️⛷️🏂🏃‍♀️🌻🏔️🍺

USGS Earthquakes@USGS_Quakes

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Rich Briggs@rangefront·12 May

@timblor @DanielleVerdugo @phaneritic Locals know the name and nobody else gives af so it’s all good 🙃

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Danielle Madugo@DanielleVerdugo·12 May

Wondering if with a normal focal mechanism and initially shallow depth if there was a lake tsunami. earthquake.usgs.gov/earthquakes/ev…

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Rich Briggs@rangefront·12 May

@TokyoSilk @wildland_zko One representation of active faults from USGS is here: usgs.gov/programs/earth…

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Leslie Anne Rogers@TokyoSilk·12 May

@wildland_zko I’m not familiar with the faults in that area… can you describe them or do you have good resources to recommend? I found a USGS PDF from a 1988 survey that gives a good geologic perspective, but I don’t know the area well. pubs.er.usgs.gov/publication/of…

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Zeke Lunder ~ The Lookout@wildland_zko·12 May

We felt the 5.5 earthquake from Lake Almanor here in Chico. Many of the faults in this area are visible in features like the Mud Creek Rim (Johnson's Grade), or in the steep dropoffs on the west side of the Lake Almanor Peninsula. They also carry north into the Hat Creek Rim.

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Rich Briggs@rangefront·12 May

@patton_cascadia ‘#Famous,’ love it. Lassen County, complete gentrification scheduled for year 2075

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Jason "Jay" R. Patton@patton_cascadia·12 May

@rangefront #HomeTown #Famous of course, i had to go double check to see that i spelled it correctly. we put these reports together for the state in under half hour, so the chance for mistakes is huge. #TwitterPeerReview

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Jason "Jay" R. Patton@patton_cascadia·12 May

#EarthquakeReport for M5.5 #Earthquake in Lake Almanor #California normal faulting event, possibly on Skinner Lake fault, or Butt Creek fault zone, extensions of the Mohawk Valley fault more about Mohawk Valley flt in '16 report earthjay.com/?p=4163 earthquake.usgs.gov/earthquakes/ev…

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Rich Briggs@rangefront·12 May

@DanielleVerdugo @phaneritic Relative to geoid. Still, shallow. And I’m cracking up basemap says’KeddLe Ridge.’ Yeah um no

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Danielle Madugo@DanielleVerdugo·12 May

@phaneritic Not sure I believe that depth, yet. The 2013 earthquake in the same area was at 8km.

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Rich Briggs@rangefront·2 May

@timblor It’s almost comical how the scarp is now part of the defensive perimeter. 🍋 🍋 🍋 -> 🥤

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Rich Briggs@rangefront·2 May

Ha, looks like the airship hangar and airstrip are built right next to an active fault. Wonder what the fault setbacks for stealth balloons are 😂 #BlackSky #oops

BlackSky@BlackSky_Inc

#BREAKING: $BKSY releases the 1st & only #satellite image of an alleged airship at a military base in #China. The rare image was captured on Nov. 4, 2022 at 9 a.m. local time at the Korla East Test Site. Read the full release here: blacksky.com/2023/05/01/bla… #BlackSky #OSINT

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Anthony Lomax 🌍 🇪🇺🇺🇦@ALomaxNet·6 Mar

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…

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Rich Briggs@rangefront·6 Mar

@KeepItRheol Sorry, had a Twitter-free weekend! That’s a good question. My hunch is this coalesces at shallow depths, but it can also depend on the strain regime. Transtension may stay messier deeper (agupubs.onlinelibrary.wiley.com/doi/abs/10.102…)

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Rich Briggs@rangefront·5 Mar

@KeepItRheol @faultcreeper I guess I’m not at all surprised how localized it is - most big ruptures in alluvium are for long stretches, and the overall geomorph of the fault zone is amazing. And thank goodness because this is the basis of trench paleoseismology! But also wow

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Rich Koehler@faultcreeper·4 Mar

In the land of 8+ m offsets. Multiple teams making their way through this area, so comprehensive documentation in progress

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Rich Briggs@rangefront·4 Mar

Woah, look like you can see the slope failure happen here 😧

Doç. Dr. Taylan SANÇAR@tsancar

A short recording of the first earthquake on 6 February./ 6 Şubat'ta olan ilk depremden kısa bir kayıt. @AktifTektonik @CengizZabci @jeomusa @snnkcz @akyuz24 #deprem #TurkeySyriaEarthquake2023 #TurkeyEarthquake

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Rich Koehler@faultcreeper·3 Mar

Todays big rupture 7.8 m of concrete wall. Also, displacement cutting off a drainage ( classic shutter ridge)

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Rich Briggs@rangefront·3 Mar

@geoloJD @ziyadin @pabloj_gonzalez @JudithGeology @TTremblingEarth @ekh_sci @USGS In the same vein, this is the Garlock paper that blew my mind in grad school (Peltzer at al. 2001) www-gpsg.mit.edu/CdSeminar2003/…

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JD Dianala@geoloJD·2 Mar

@ziyadin @pabloj_gonzalez @JudithGeology @TTremblingEarth @ekh_sci @USGS @rangefront Yeah, or the signal across the EAF just drowns out deformation signals. [Just for added context for those who might not be familiar: The geodetic (present-day) slip rate on the Garlock fault (CA, USA) is much lower than the geologic slip rate sciencedirect.com/science/articl…]

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Ziyadin Çakır@ziyadin·2 Mar

Secular plate motions from Sentinel-1 data between 2014 and 2020 in the Kahramanmaras #earthquake region. Regions in green color are moving northeastward with respect to Anatolia in blue. Red lines are earthquake ruptures from @USGS @rangefront #TurkeySyriaEarthquake #deprem

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Rich Koehler@faultcreeper·2 Mar

Uphill facing fault plane, faulted terrace with thrashed village in background, and ruptures extending along linear valley .

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Rich Briggs@rangefront·2 Mar

@patton_cascadia @ALomaxNet @RLacassin @JudithGeology @geosmx Right? It’s scary out there, brother

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Jason "Jay" R. Patton@patton_cascadia·2 Mar

@rangefront @ALomaxNet @RLacassin @JudithGeology @geosmx interesting. i had not heard that people think aftershocks are relatively unimportant! wow

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Dr. Judith Hubbard@JudithGeology·2 Mar

This image is particularly helpful for thinking about earthquakes and aftershocks. Large aftershocks can occur, but they are not the norm - and they become less likely with time. reuters.com/graphics/TURKE…

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Rich Briggs@rangefront·2 Mar

@ALomaxNet @patton_cascadia @RLacassin @JudithGeology @geosmx We’re seeing that the ‘aftershock’ terminology, and the widespread assumption that aftershocks are relatively unimportant, affected several pretty high-level response efforts that omitted the M7.5 intensities from spatial analyses. So it’s not just a semantic argument.

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Anthony Lomax 🌍 🇪🇺🇺🇦@ALomaxNet·2 Mar

@patton_cascadia @RLacassin @JudithGeology @geosmx I have trouble with "triggered" because it implies something like "the straw that broke the camel's back". But in the case of the M7.5, there was likely a whole new bale of straw added in the form of large stress changes caused by the M7.8 ...

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Sinan Akciz@snnkcz·24 Şub

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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탐색

@USGS_Quakes @collett_camille @nadinegrr @faultjumper @timblor @DanielleVerdugo @phaneritic @TokyoSilk