Pinned toot

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.

Very pleased to have been involved in this study, published today in a First Release version, which shows that the earliest large Antarctic Ice Sheet that developed about 33.7 million years ago did not extend to West Antarctica.

Explainer article about new paper about the dawn of Antarctic ice sheets. First Release version of paper published today in Science.

for in 2019 the Sequence in southern

M6.4 left-lateral strike-slip earthquake triggered M7.1 right-lateral ss eq
generated liquefaction/landslides
@CAGeoSurvey @USGS_Quakes responded

read reports

Have a great weekend! Here's your Friday ice update - #Arctic sea ice extent is currently the 6th lowest on record (JAXA data)...

• about 30,000 km² below the 2010s mean
• about 630,000 km² below the 2000s mean
• about 1,150,000 km² below the 1990s mean
• about 1,550,000 km² below the 1980s mean

More plots:

for along the Tonga plate boundary

reverse or thrust (compressional) mechanism
intermediate depth
event within subducted Pacific plate

learn about regional tectonics in 2022 report:

for in 2019 M 8.0 in

intermediate depth yet widely felt
@USGS_Quakes models suggest chance for triggered landslides and induced liquefaction

learn more:

for in 2017 M6.2 & M6.3 couplet in

right-lateral strike-slip (side by side motion, like the San Andreas fault) earthquake associated with the Denali/Chatham Strait fault system

learn more

for in 1992 M7.2 in

I was there
triggered 2 M6+ eqs
generated tsunami, led to the National Tsunami Hazard Mitigation Program
landslides and liquefaction

learn more:

for in 2023 M7.2 along the Kermadec subduction zone (convergent plate boundary fault system)

generated modest
felt strongly on Raoul Island MMI 7 intensity!

learn more

for in 2023 M7.1 offshore of

felt widely
@usgs_earthquakes models show high chance for liquefaction and moderate chance for landslides

learn more:

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