Jason R. Patton @earthjay@qoto.org

#EarthquakeReport for M5.9 #Lindol #Earthquake in #Mindanao #Philippines

shallow crustal
strike-slip
probably left-lateral along the Philippines fault system

https://earthquake.usgs.gov/earthquakes/eventpage/us6000lgpg/executive

tectonic background & historical analogues
https://earthjay.com/?p=5255

#EarthquakeReport for M5.9 #Lindol #Earthquake in #Mindanao #Philippines

intensity report MMI5
crustal strike-slip
probably along Philippine fault system http://dx.doi.org/10.5772/56593

https://earthquake.usgs.gov/earthquakes/eventpage/us6000lgpg/executive

tectonic background & historical analogues
https://earthjay.com/?p=5255

#EarthquakeReport for #OTD in 1989 M6.9 #Earthquake in central #California

#LomaPrieta #WorldSeries temblor occurred along the #SanAndreas fault system
landslides & liquefaction
strong & widely felt ground shaking
many casualties :-(

extensive report:
https://earthjay.com/?p=8992

#EarthquakeReport for M4.8 #Earthquake near #Petrolia #california

left-lateral strike-slip (?) earthquake within the Gorda plate

https://earthquake.usgs.gov/earthquakes/eventpage/nc73947830/executive

read about regional tectonics here: https://earthjay.com/?p=10604

@ingalls yes, it could be in the top, but i suspect that, if in the jdf plate, it might be in the lower part because the plate is starting to bend here (causing extension in upper part and compression in lower part).

after i posted this, the depth got closer to the megathrust interface depth, so i began to think that this may be on the megathrust itself.

#EarthquakeReport for #OTD in 2016 M6.4 #Earthquake offshore of #NewBritain #PapuaNewGunea

intermediate depth normal (extensional) earthquake within (intraslab) the Solomon Sea plate

read more:
https://earthjay.com/?p=4346

Eclipse in Manila

In Memoriam: James Frazier “Jim” Davis (1931–2023)

California Geological Survey, California State Geologist, 1978–2003

https://www.conservation.ca.gov/cgs/pages/tributes/jim_davis.aspx

#EarthquakeReport for #OTD in 2018 M7.0 #Earthquake in #NewBritain #PapuaNewGuinea

reverse (compressional) earthquake mechanism

learn more here:
https://earthjay.com/?p=7839

#EarthquakeReport for M 4.5 #Earthquake beneath #Washington

Shaking intensity up to MMI 5
Compressional earthquake mechanism suggests the event may be in North America plate

Learn more about the Cascadia subduction zone here: earthjay.com/?p=3640

#EarthquakeReport for M 4.5 #Earthquake beneath #Washington

Depth suggests may be intraplate earthquake, within subducted Juan de Fuca plate (?)

Learn more about the Cascadia subduction zone here: https://earthjay.com/?p=3640

https://earthquake.usgs.gov/earthquakes/eventpage/uw61965081/executive

#EarthquakeReport for M 6.7 & M 6.9 #Earthquake sequence in and offshore of #PapuaNewGuinea

two reverse (compressional) intraplate (?) earthquakes
earthquakes appear to reveal geometry of subducted slab (?)
low intensity ground shaking

read report here https://earthjay.com/?p=11470

Office Assistant got some exercise today...

#EarthquakeReport #TsunamiReport for #OTD M 7.5 #Gempa #Earthquake in #Dongalla #Palu #Sulawesi #Indonesia

left-lateral strike-slip earthquake
kilometer scale ground failures
large tsunami runups

reports:
https://earthjay.com/?p=7793
https://earthjay.com/?p=7866

#EarthquakeReport for M5.4 #Gempa #Earthquake offshore of #Sumatra #Indonesia

Possibly aftershock from 2012 Wharton Basin M8.6 earthquake sequence

Read about 2012 earthquakes earthjay.com/?p=294

https://earthquake.usgs.gov/earthquakes/eventpage/us6000lb60/executive

#EarthquakeReport for #OTD in 2016 M 4.9 #Earthquake offshore of #Oregon #California

classic left-lateral strike-slip earthquake along reactivated faults within the Gorda plate

read more: https://earthjay.com/?p=4320

#EartthquakeReport #EarthquakeToot #TsunamiReport for M7.2 #Earthquake & #Tsunami offshore of #Alaska

megathrust interface eq in area of low slip '20 M 7.8
tsunami at Sand Point

read more about '20 (in green) '21 (blue) sequences in '21 report https://earthjay.com/?p=9849

https://earthquake.usgs.gov/earthquakes/eventpage/us7000kg30/executive