Jason R. Patton @earthjay@qoto.org

#EarthquakeReport for #OTD in 2011 M 9.1 #Earthquake offshore of #Japan

megathrust subduction zone earthquake
generated transpacific #Tsunami
triggered landslides & induced liquefaction
strong shaking felt widely

learn interactively here: https://earthjay.com/?p=9773

#EarthquakeReport for #OTD in 2017 M 6.3 #Earthquake in #NewBritain #PapuaNewGuinea

reverse/thrust (compressional) earthquake mechanism
possibly (?) on megathrust subduction zone fault

learn more: https://earthjay.com/?p=5142

#EarthquakeReport for #OTD in 2021 M7.3/7.4/8.1 #Earthquake along Kermadec trench

each earthquake generated #Tsunami as evidenced by tide gage data

learn more https://earthjay.com/?p=9955

#EarthquakeReport for M6.7 #Earthquake offshore of #Macquarie

Possibly right-lateral strike-slip mechanism (?)
Analogy earthquake in 1987

Learn more from 2016 report:
https://earthjay.com/?p=3736

https://earthquake.usgs.gov/earthquakes/eventpage/pt24063000/executive

Red circle = epicenter

#EarthquakeReport #TsunamiReport for #OTD in 2010 M 8.8 #Sismo #Terremoto #Earthquake offshore of #Chile

megathrust subduction zone earthquake
generated trans-Pacific #Tsunami
@USGS_Quakes models show chance for landslides/liquefaction

learn more https://earthjay.com/?p=5111

#EarthquakeReport for #OTD in 2018 M 7.5 #Earthquake in #PapuaNewGuinea

reverse (compressional) earthquake mechanism
associated (?) with Papuan Fold and Thrust Belt (PFTB)

learn more
https://earthjay.com/?p=7157
update
https://earthjay.com/?p=7193

#EarthquakeReport for #OTD in 2022 M 6.1 #Gempa #Earthquake in #Sumatra #Indonesia

right-lateral strike-slip earthquake
associated w/Sumatra fault
high intensity shaking felt widely
@USGS_Quakes models show probable landslide/liquefaction

learn more:
https://earthjay.com/?p=10146

#EarthquakeReport for #OTD in 2018 M 7.2 #Sismo #Terremoto #Earthquake en #Mexico

generated strong ground shaking and lots of damage

learn more:
https://earthjay.com/?p=7119

#EarthquakeReport for #OTD in 2021 M 7.7 #Earthquake offshore of the #LoyaltyIslands

thrust (compressional) earthquake mechanism
possibly on megathrust subduction zone fault
generated small #Tsunami

See poster here:
https://earthjay.com/?p=9988

#EarthquakeReport for #OTD in 1971 M 6.7 #Earthquake in #Sylmar #California

UPDATED POSTER TODAY

many casualties :-(
led to many improvements :-)
the Alquist Priolo Act
@USGS_Quakes models suggested chance for landslides and liquefaction

learn more here
https://earthjay.com/?p=7092

#EarthquakeReport for #OTD in 1971 M 6.7 #Earthquake in #Sylmar #California

many casualties :-(
led to many improvements :-)
e.g., the Alquist Priolo Act
@USGS_Quakes models suggested high chance for landslides and liquefaction

learn more here:
https://earthjay.com/?p=7092

#EarthquakeReport for #OTD in 2017 M 6.3 #Earthquake in #Pakistan

associated with the Makran convergent (moving together) plate margin
caused extensive damage
caused a mud volcano offshore

learn more here:
https://earthjay.com/?p=5063

#EarthquakeReport for #OTD in 2023 M 7.8 & 7.5 #Deprem #Earthquake in #Turkiye #Turkey

Kahramanmaras earthquake sequence involved multiple faults
killed >50,000 :-(
triggered tsunami
landslides and liquefaction

read report:
https://earthjay.com/?p=10772

#EarthquakeReport for #OTD in 2016 M6.4 #Earthquake in #Taiwan

@USGS_Quakes model suggests there was a high chance for liquefaction

read reports:
https://earthjay.com/?p=3689
https://earthjay.com/?p=3701

#EarthquakeReport for M4.9 #Earthquake offshore #Petrolia northern #California

probably a right-lateral strike-slip earthquake along the Mendocino fault

more about regional tectonics from 2021 report: https://earthjay.com/?p=10125

https://earthquake.usgs.gov/earthquakes/eventpage/nc73997816/executive

#EarthquakeReport for #Earthquake #Swarm near Tres Pinos #California

https://earthquake.usgs.gov/earthquakes/eventpage/nc73997351/executive

learn about the San Andreas for 1989 earthquake to the northwest of today's swarm: https://earthjay.com/?p=8992

#EarthquakeReport for #OTD in 2019 M 6.7 #Sismo #Terremoto #Earthquake offshore of #Guatemala #Mexico

possibly plate boundary megathrust interface earthquake

read report:
https://earthjay.com/?p=8307

#EarthquakeReport for #OTD in 2020 M 7.7 #Sismo #Terremoto #Earthquake

left-lateral strike-slip (plates move side-by-side) earthquake mechanism
generated a #Tsunami
felt widely

report here:
https://earthjay.com/?p=9322

#EarthquakeReport for M 7.0 #Earthquake in western #China

updated posters with aftershocks and detailed fault mapping
tectonic cross section and geodetic profiles
ground failure and intensity interpretive posters

full report here:
https://earthjay.com/?p=11801

#EarthquakeReport for M 4.2 #Earthquake offshore of northern #California

Normal (extensional) oblique earthquake mechanism

Within subducted Gorda plate

Tectonic background in 2018 report:
https://earthjay.com/?p=7426

https://earthquake.usgs.gov/earthquakes/eventpage/nc73992726/executive