Rich Briggs

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Rich Briggs

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 参加日 Ağustos 2009
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Rich Koehler
Rich Koehler@faultcreeper·
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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USGS Earthquakes
USGS Earthquakes@USGS_Quakes·
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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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

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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Leslie Anne Rogers
Leslie Anne Rogers@TokyoSilk·
@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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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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@patton_cascadia ‘#Famous,’ love it. Lassen County, complete gentrification scheduled for year 2075
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@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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@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
Danielle Madugo@DanielleVerdugo·
@phaneritic Not sure I believe that depth, yet. The 2013 earthquake in the same area was at 8km.
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@timblor It’s almost comical how the scarp is now part of the defensive perimeter. 🍋 🍋 🍋 -> 🥤
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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…
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@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
Rich Koehler@faultcreeper·
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 Koehler
Rich Koehler@faultcreeper·
Todays big rupture 7.8 m of concrete wall. Also, displacement cutting off a drainage ( classic shutter ridge)
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Rich Koehler
Rich Koehler@faultcreeper·
Uphill facing fault plane, faulted terrace with thrashed village in background, and ruptures extending along linear valley .
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Dr. Judith Hubbard
Dr. Judith Hubbard@JudithGeology·
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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@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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@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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@USGS_Quakes @collett_camille @nadinegrr @faultjumper @timblor @DanielleVerdugo @phaneritic @TokyoSilk