In Memoriam: James Frazier “Jim” Davis (1931–2023)
California Geological Survey, California State Geologist, 1978–2003
https://www.conservation.ca.gov/cgs/pages/tributes/jim_davis.aspx
#EarthquakeReport for #OTD in 2018 M7.0 #Earthquake in #NewBritain #PapuaNewGuinea
reverse (compressional) earthquake mechanism
learn more here:
https://earthjay.com/?p=7839
#EarthquakeReport for M 4.5 #Earthquake beneath #Washington
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
#EarthquakeReport for M 4.5 #Earthquake beneath #Washington
Depth suggests may be intraplate earthquake, within subducted Juan de Fuca plate (?)
Learn more about the Cascadia subduction zone here: https://earthjay.com/?p=3640
https://earthquake.usgs.gov/earthquakes/eventpage/uw61965081/executive
#EarthquakeReport for M 6.7 & M 6.9 #Earthquake sequence in and offshore of #PapuaNewGuinea
two reverse (compressional) intraplate (?) earthquakes
earthquakes appear to reveal geometry of subducted slab (?)
low intensity ground shaking
read report here https://earthjay.com/?p=11470
#EarthquakeReport #TsunamiReport for #OTD M 7.5 #Gempa #Earthquake in #Dongalla #Palu #Sulawesi #Indonesia
left-lateral strike-slip earthquake
kilometer scale ground failures
large tsunami runups
reports:
https://earthjay.com/?p=7793
https://earthjay.com/?p=7866
#EarthquakeReport for M5.4 #Gempa #Earthquake offshore of #Sumatra #Indonesia
Possibly aftershock from 2012 Wharton Basin M8.6 earthquake sequence
Read about 2012 earthquakes earthjay.com/?p=294
https://earthquake.usgs.gov/earthquakes/eventpage/us6000lb60/executive
#EarthquakeReport for #OTD in 2016 M 4.9 #Earthquake offshore of #Oregon #California
classic left-lateral strike-slip earthquake along reactivated faults within the Gorda plate
read more: https://earthjay.com/?p=4320
#EartthquakeReport #EarthquakeToot #TsunamiReport for M7.2 #Earthquake & #Tsunami offshore of #Alaska
megathrust interface eq in area of low slip '20 M 7.8
tsunami at Sand Point
read more about '20 (in green) '21 (blue) sequences in '21 report https://earthjay.com/?p=9849
https://earthquake.usgs.gov/earthquakes/eventpage/us7000kg30/executive
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. https://jardvis.hi.is/is/eldgos-vid-litla-hrut-nidurstodur-maelinga-13-juli #Fagradalsfjall #volcano🌋 #geology
(MAP) Here’s Where They're Planning New Murals for the 2023 Eureka Street Art Festival
https://lostcoastoutpost.com/2023/jul/15/map-heres-where-theyre-planning-new-murals-2023-eu/
read our paper on slip deficits calculated for megathrust and crustal faults in southern #Cascadia subduction zone & #Mendocino triple junction in northern #California
we used 3 geodetic datasets: GNSS, benchmark leveling, tide gage
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.
https://tektonika.online/index.php/home/article/view/6
Toot it, share it, read it FREE !
@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!
#EarthquakeReport #EarthquakeToot for #OTD in 2019 M7.2 #Gempa #Earthquake in #Halmahera #Indonesia
onshore crustal strike-slip fault earthquake yet generated a modest #Tsunami
felt widely
potential for triggered landslides and induced liquefaction
read report here
https://earthjay.com/?p=8781
#EarthquakeReport #EarthquakeToot for M 6.4 #Earthquake 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
https://earthjay.com/?p=10125
https://earthquake.usgs.gov/earthquakes/eventpage/nc73821036/executive
hi res map here
https://earthjay.com/earthquakes/20221220_norcal/20221220_norcal_interpretation.jpg
lover of mud, sand, gravel, chocolate and Earthquake Reports at https://earthjay.com