Greetings tooters!

this account is for Dr. Jason "Jay" R. Patton (aka EarthJay) and I march for science.

His main education/outreach effort is voluntarily writing up posts on These are for and events of interest, sorted in different ways; sorted by year here:

they are an engineering geologist (PG license 9758) who serves the public while at the California Geological Survey, Seismic Hazards and Tsunami programs.

he has been studying the tectonics of the Cascadia subduction zone (a convergent plate boundary fault system) for over 25 years (MS thesis at cal poly humboldt, dept geology). he is an adjunct professor at this dept.

they studied marine sedimentary records (submarine landslide deposits called turbidites) of earthquakes offshore of Sumatra/Cascadia for my marine geology & geophysics PhD at oregon state university.

capital letters are over rated but chocolate and oxford commas are not.

@JochenFromm indeed!

it appears to be related to the Pesaro mare-Cornelia fault (using the Database of Individual Seismogenic Sources 3.2.0 in the google map).

this fault may be between 120-160km. using wells & coppersmith mag relations with subsurface rupt length, this fault could produce a mag M 7.7-7.7

there were 2 events of similar mag in the past century. map below shows 1922-2022 M>5.5.

felt reports along the coast reached MMI 7

geoscope carte shows a thrust mechanism, probably on fault plane dipping to the west, unless this is on a fault antithetic to the mapped fault (so would be reverse dipping to the east)

learn more about the regional tectonics from this page (and included linked report pages) here

USGS page

IPGP geoscope page

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