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Jason R. Patton

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 earthjay.com. These are for and events of interest, sorted in different ways; sorted by year here: earthjay.com/?page_id=3220

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

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. geology.humboldt.edu/

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. ceoas.oregonstate.edu/

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

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Jason R. Patton

for M 6.0 offshore of

right-lateral strike-slip earthquake mechanism
along the Blanco transform fault, plate boundary between the Pacific and Juan de Fuca plates

tectonic background in '19 report earthjay.com/?p=8935

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Jason R. Patton

for M 4.4 in

right-lateral (?) strike-slip fault earthquake sequence
in region of 1991 Honeydew Earthquake

report here: earthjay.com/?p=12091

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Jason R. Patton

for M4.4 in

right-lateral strike-slip earthquake
associated with 1991 Honeydew earthquake (?)
interpretive poster
report forthcoming

earthquake.usgs.gov/earthquake

more in 2021 report: earthjay.com/?p=10125

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Jason R. Patton

upon a night of reflection (getting over a cold so not thinking clearly) and the relocations, these appear to NOT be on the Mendocino fault. but probably along a north-south oriented right-lateral strike-slip fault in the North America plate.

Show thread
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Jason R. Patton

for M 4.4 near

5 earthquakes M 3.6, 4.1, 4.4, 4.1, 2.6
right-lateral strike-slip earthquake mechanism
likely along subducted Mendocino fault beneath North America

tectonic background in '21 report earthjay.com/?p=10125

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Jason R. Patton

for M 6.5 offshore of

Strike-slip earthquake mechanism
Felt onshore shaking intensity MMI 5

Tectonic setting in '18 report earthjay.com/?p=7888

earthquake.usgs.gov/earthquake

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Jason R. Patton

for M4.7 near southern

left-lateral (?) strike-slip earthquake mechanism
widely felt with reported shaking intensity MMI 5 (so far)

earthquake.usgs.gov/earthquake

tectonic background in 2018 report earthjay.com/?p=7311

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Jason R. Patton

for M7.0 offshore of

@USGS_Quakes models show chance for triggered landslides and induced liquefaction
comparison between modeled shaking intensity and observations of intensity

report here:
earthjay.com/?p=12053

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Jason R. Patton

for the M7.1 and offshore of

compressional earthquake mechanism
interface earthquake along the megathrust subduction zone fault
generated local tsunami
Japan issued megaquake advisory

read report here earthjay.com/?p=12016

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Jason R. Patton

for M 7.1 offshore of

megathrust subduction zone earthquake

generated local up to about 40 cm in amplitude

these are three tide gage plots

earthquake.usgs.gov/earthquake

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Jason R. Patton

for M 5.2 south of

reverse/thrust mechanism (compressional earthquake)
high acceleration (31% g recorded ~8km to the south of the epicenter)

earthquake.usgs.gov/earthquake

tectonic setting in 2016 report earthjay.com/?p=3758

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Jason R. Patton

for the 11 July '23 M 7.1 and 2 August '24 M 6.8 and

M 7.1: extensional (normal) mechanism, deep, intraplate (slab)
M 6.8: compressional (reverse) mechanism, not deep, interface or intraplate (crustal)

report here:earthjay.com/?p=11987

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Jason R. Patton

for M 6.8 offshore of

reverse mechanism (compressional) related to the subduction zone (convergent plate boundary)

earthquake.usgs.gov/earthquake

read more in report from the mainshock: earthjay.com/?p=11611

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Jason R. Patton boosted
Dr. Judith Hubbard

Earlier today, a M6.8 earthquake struck the Philippines, just offshore Mindanao. This represents the 2nd largest aftershock of a M7.6 last December.

Delayed large aftershocks like this are not common, but they are always possible.

Read more on our blog: earthquakeinsights.substack.co

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Jason R. Patton

for M6.8 in the

mechanism & depth suggest to be on megathrust subduction zone (?)

@USGS_Quakes

model suggests chance for

earthquake.usgs.gov/earthquake

in region of M 7.6 in December '23: earthjay.com/?p=11611

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Jason R. Patton

for M6.8 in the

mechanism & depth suggest to be on megathrust subduction zone (?)
possible local (?)

earthquake.usgs.gov/earthquake

in region of M 7.6 in December '23: earthjay.com/?p=11611

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Jason R. Patton

for M 4.9 near southern

Upon further reflection, appears to be left-lateral earthquake sequence
possibly related to the Manix fault (?)

report here: earthjay.com/?p=11968

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Jason R. Patton

for the M 4.9 east of southern

looks like a right-lateral strike-slip earthquake mechanism (near the Calico fault)

earthquake.usgs.gov/earthquake

learn about the tectonics of southern California in '20 report earthjay.com/?p=9580

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Jason R. Patton

for M6.2 en

Intermediate depth

Tectonic background in 2019 report from analogous event
earthjay.com/?p=8307

earthquake.usgs.gov/earthquake

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Jason R. Patton

for M7.4 en y

intermediate depth
normal (extensional) mechanism
within subducted Nazca plate (slab event)

report: earthjay.com/?p=11955

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