Magnitude 6.6 earthquake off northwest Western Australia

[davenn]

As I type, I'm recording a prelim. Mw6.6 just offshore of NW WA, Australia.
Tho this is not the biggest Australian quake ( which also happened in the state of Western Australia), it is the
largest one I have recorded so far.

http://www.sydneystormcity.com/seismograms.htm
https://earthquake.usgs.gov/earthquakes/eventpage/us70004jxe/executivecheers
Dave

 

[davenn]

Seismogram with first hour of recording till just before it started overwriting

Location map

Dave

 

[Astronuc]

It seems rather rare to have an earthquake in that region, but not unprecedented.
See - 1929 08 16 at 21:32 UTC (17th at 5:32 am WST ) in
https://aees.org.au/wp-content/uploads/2014/02/Historical-Earthquakes-in-Western-Australia.pdf
https://trove.nla.gov.au/newspaper/article/16576674? - from SMH, Tuesday, 20 Aug 1929

https://www.abc.net.au/news/2019-07-14/earthquake-in-indian-ocean-felt-from-broome-to-perth/11308064

 

[Astronuc]

Tho this is not the biggest Australian quake ( which also happened in the state of Western Australia),

Is one referring to the Exmouth earthquake in 1906?
https://en.wikipedia.org/wiki/Earthquakes_in_Western_Australia#Exmouth_1906
I vaguely remember one in Gippsland, Victoria, in 1966, mainly because it didn't affect Melbourne.

Interesting perspective on earthquakes/seismicity in Victoria
https://aees.org.au/wp-content/uploads/2015/02/Historical-earthquakes-in-Victoria.pdf
and more recently
https://www.ses.vic.gov.au/document...Victoria/42317da9-fd2c-4d5f-8a5e-90ca0095acb0
More historical
https://www.arcgis.com/apps/MapSeries/index.html?appid=325bf25bf3674571890c5e2473b6bc41

 

[davenn]

It seems rather rare to have an earthquake in that region, but not unprecedented.
See - 1929 08 16 at 21:32 UTC (17th at 5:32 am WST ) in
https://aees.org.au/wp-content/uploads/2014/02/Historical-Earthquakes-in-Western-Australia.pdf

Wonderful article

thanks for the other links, will read when I get time Dave