Jason R. Patton @earthjay@qoto.org

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

generated modest #Tsunami
felt strongly on Raoul Island MMI 7 intensity!

learn more
https://earthjay.com/?p=11021

#EarthquakeReport for #OTD in 2023 M7.1 #Gempa #Earthquake offshore of #Sumatra #Indonesia

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

learn more:
https://earthjay.com/?p=11040

#EarthquakeReport for M6.0 & M6.1 #Earthquake in #Taiwan

3rd and 4th largest aftershocks following 2 April '24 M 7.4
@USGS_Quakes model for M6.0 (onshore) suggests high chance for #Liquefaction

original report here:
https://earthjay.com/?p=11904

#EarthquakeReport for M4.3 #Earthquake in southern #California

Strike-slip earthquake mechanism
Doesn't look like it's associated with a mapped fault

Learn more from 2016 report https://earthjay.com/?p=3758

https://earthquake.usgs.gov/earthquakes/eventpage/ci40549375/executive

#EarthquakeReport for #OTD in 1906 M7.8 #Earthquake in #California

right-lateral strike-slip earthquake on the San Andreas fault
generated modest #Tsunami in #SanFrancisco Bay

learn more here:
https://earthjay.com/?p=8428

@firefly apologies, i have not gotten to write this up (yet). i plan on this. but have been super busy :-)

#EarthquakeReport for M4.8 #Earthquake on the east coast of the USA

Oblique reverse (compressional) earthquake mechanism
Felt widely

Learn more abt the difference between east coast & west coast earthquakes here: https://earthjay.com/?p=5970

https://earthquake.usgs.gov/earthquakes/eventpage/us7000ma74/executive

#EarthquakeReport for the M7.4 #Earthquake in #Taiwan

updated poster and tide gage plot
also intensity and ground failure interpretive figures

learn more here: https://earthjay.com/?p=11904

#EarthquakeReport for M 7.4 #Earthquake in #Taiwan

reverse mechanism
possibly slip on an east dipping fault (?)
strong ground shaking felt widely
landslides & liquefaction
modest local #Tsunami

updated poster & report here: https://earthjay.com/?p=11904

#EarthquakeReport for M7.4 & M6.5 #Earthquake in #Taiwan

sadly people are injured and worse

Reverse (Compressional) mechanism
Strong ground shaking
Interpretive Poster

Learn about regional tectonics from 2022 report: https://earthjay.com/?p=10450

https://earthquake.usgs.gov/earthquakes/eventpage/at00sbcakx/executive

#EarthquakeReport for M7.4 #Earthquake in #Taiwan

small sized #Tsunami recorded at Ishigakajima to the east of Taiwan

Learn about regional tectonics from 2022 report: https://earthjay.com/?p=10450

https://earthquake.usgs.gov/earthquakes/eventpage/at00sbcakx/executive

#EarthquakeReport for M7.4 & M6.5 #Earthquake in #Taiwan

Major aftershock is shallower and maybe more damaging (?) based on @USGS_Quakes PAGER alert

Learn about regional tectonics from 2022 report:
https://earthjay.com/?p=10450
7.4
https://earthquake.usgs.gov/earthquakes/eventpage/at00sbcakx/executive
6.5
https://earthquake.usgs.gov/earthquakes/eventpage/us7000m9gc/executive

#EarthquakeReport for M7.4 #Earthquake in #Taiwan

Reverse (Compressional) mechanism
Strong ground shaking

Learn about regional tectonics from 2022 report:
https://earthjay.com/?p=10450

https://earthquake.usgs.gov/earthquakes/eventpage/at00sbcakx/executive

#EarthquakeReport for #OTD in 2017 M 6.6 #Earthquake offshore of #Kamchatka

reverse (compressional) earthquake mechanism
north of Pacific plate slab (?) so interesting earthquake in complicated tectonic region

learn more: https://earthjay.com/?p=5200

#EarthquakeReport for #OTD in 2017 M5.7 #Sismo #Terremoto #Earthquake in the #GulfOfCalifornia #MarDeCortés offshore of #Mexico

right-lateral strike-slip (moving side-by-side) earthquake
overlapping fracture zones & spreading ridges

learn more about the https://earthjay.com/?p=5210

#EarthquakeReport for $OTD in 1964 M9.2 #Earthquake in #Alaska

2nd largest eq recorded on modern instruments
generated coseismic (during the earthquake) vertical land motion
triggered a transpacific #Tsunami

read more https://earthjay.com/?p=3833

#EarthquakeReport for M6.4 #Earthquake near #Vanuatu #Fiji

Strike-slip (right-lateral?) related to transform fault (?) along the Central Spreading Ridge in North Fiji Basin

Read 2017 report for tectonic background https://earthjay.com/?p=4761

https://earthquake.usgs.gov/earthquakes/eventpage/us7000m86i/executive

#EarthquakeReport for #OTD in 2019 M 5.0 #Earthquake in #Alaska

normal (extensional) oblique (strike-slip) earthquake mechanism
interesting location with historical analogue (1958 M 7.1)

learn more: https://earthjay.com/?p=8403

#EarthquakeReport for M 6.9 #Gempa #Earthquake in #PapuaNewGuinea

oblique-normal (extensional and strike-slip)
strong shaking
chances for landslides and liquefaction

report with interpretive posters: https://earthjay.com/?p=11869