Today, at 1:00pm Western Standard Time (WST) a 5.6 earthquake hit south-west Western Australia, between Walpole and Kojonup (near town of Manjimup, 5,000 pop.). It was felt as 1 jolt, lasting a couple of seconds. The area is about 430kms south west of Perth populated by small, rural townships and farming regions. This is also a very popular tourist area.
This occurrence led me to check what other recent earthquakes the Great Southern and South-West of Australia have experienced in recent times. It is quite surprising (as people tend to think this corner of Earth is quite seismically stable):-
Last week: a 3.5 off the coast of Albany (relatively close to today's one) on Wednesday; a 3.4 at Walpole on the coast on Thursday.
29th May 2016 a 5.2 in Norseman region (getting to be remote - near the beginning of the highway going east over the Nullabor). There were 3 earthquakes in a 100km radius of Norseman on 28th May and 29th May and one on July 8th 2016 in that series that were above 5.0, including a further 3 aftershocks under 3.0.
24th February 2017 a 3.0 in Norseman region (3 earthquakes under 3.0 in January/February 2017 as well)
20th June 2018 a 4.7 130km east of Norseman (remote, so nobody was injured in that one).
9th August 2018 a 4.3 at a depth of 17km also in Norseman region.
WA's largest land-based earthquake occurred in 1968 - a 6.9. This hit a remote town called Meckering, which was destroyed, injuring people and leaving many homeless.
Perhaps we are heading towards a bigger "big" one.
This occurrence led me to check what other recent earthquakes the Great Southern and South-West of Australia have experienced in recent times. It is quite surprising (as people tend to think this corner of Earth is quite seismically stable):-
Last week: a 3.5 off the coast of Albany (relatively close to today's one) on Wednesday; a 3.4 at Walpole on the coast on Thursday.
29th May 2016 a 5.2 in Norseman region (getting to be remote - near the beginning of the highway going east over the Nullabor). There were 3 earthquakes in a 100km radius of Norseman on 28th May and 29th May and one on July 8th 2016 in that series that were above 5.0, including a further 3 aftershocks under 3.0.
24th February 2017 a 3.0 in Norseman region (3 earthquakes under 3.0 in January/February 2017 as well)
20th June 2018 a 4.7 130km east of Norseman (remote, so nobody was injured in that one).
9th August 2018 a 4.3 at a depth of 17km also in Norseman region.
WA's largest land-based earthquake occurred in 1968 - a 6.9. This hit a remote town called Meckering, which was destroyed, injuring people and leaving many homeless.
Perhaps we are heading towards a bigger "big" one.