Show newer

In Memoriam: James Frazier “Jim” Davis (1931–2023)

California Geological Survey, California State Geologist, 1978–2003

conservation.ca.gov/cgs/pages/

for M 4.5 beneath

Shaking intensity up to MMI 5
Compressional earthquake mechanism suggests the event may be in North America plate

Learn more about the Cascadia subduction zone here: earthjay.com/?p=3640

Show thread

for M 6.7 & M 6.9 sequence in and offshore of

two reverse (compressional) intraplate (?) earthquakes
earthquakes appear to reveal geometry of subducted slab (?)
low intensity ground shaking

read report here earthjay.com/?p=11470

for M5.4 offshore of

Possibly aftershock from 2012 Wharton Basin M8.6 earthquake sequence

Read about 2012 earthquakes earthjay.com/?p=294

earthquake.usgs.gov/earthquake

for in 2016 M 4.9 offshore of

classic left-lateral strike-slip earthquake along reactivated faults within the Gorda plate

read more: earthjay.com/?p=4320

I'm a geologist and this isn't cute or funny. Rocks only climb trees like this when they're very stressed.

Data from #LitliHrutur eruption as of July 13 by #Iceland Institute of Earth Sciences - graph in Icelandic & English; maps in Icelandic - "hraun" is Icelandic for lava and marks lava flows from 2021, 2022 & 2023. jardvis.hi.is/is/eldgos-vid-li #Fagradalsfjall #volcano🌋 #geology

Show thread

read our paper on slip deficits calculated for megathrust and crustal faults in southern subduction zone & triple junction in northern

we used 3 geodetic datasets: GNSS, benchmark leveling, tide gage

doi.org/10.1785/0120230007

Today, #TEKTONIKA #DOAJ has published its first paper ! 🎉

20th to 21st Century Relative Sea and Land Level Changes in Northern #California - by J. Patton @earthjay et al.

tektonika.online/index.php/hom

Toot it, share it, read it FREE !

#openscience #openaccess #tectonics #eustasy #SeaLevel

@wearetektonika @earthjay @RobinLacassin As one of the reviewers of this work, I am thrilled to see my review report published in #openaccess, along with the paper. This is a big step forward toward #transparency of the #peerreview process, and recognition of the work involved in reviewing scientific papers. Congratulations to the authors for their paper, and to @wearetektonika editors for their work!

for in 2019 M7.2 in

onshore crustal strike-slip fault earthquake yet generated a modest
felt widely
potential for triggered landslides and induced liquefaction

read report here
earthjay.com/?p=8781

for M 6.4 in Mendocino triple junction (Triangle of Doom) region

aftershocks suggest left-lateral strike-slip in Gorda plate

felt broadly, about 92%g in Ferndale

read more from last year's report
earthjay.com/?p=10125

earthquake.usgs.gov/earthquake

hi res map here

earthjay.com/earthquakes/20221

Show older
Qoto Mastodon

QOTO: Question Others to Teach Ourselves
An inclusive, Academic Freedom, instance
All cultures welcome.
Hate speech and harassment strictly forbidden.