https://earthquakes.ga.gov.au/
Michael V said:
https://earthquakes.ga.gov.au/
Could be nasty.
USGS:
https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=us7000fd9v&extent=-82.85338,-294.60938&extent=39.63954,73.125
https://earthquake.usgs.gov/earthquakes/eventpage/us7000fd9v/origin/detail
The Newcastle earthquake was M5.3.
6.0 (or even 5.8) is huge for Australia. Lucky it wasn’t in Melbourne CBD.
The Rev Dodgson said:
The Newcastle earthquake was M5.3.6.0 (or even 5.8) is huge for Australia. Lucky it wasn’t in Melbourne CBD.
Cristchurch was 12km deep.
Seismograms. (As reported by others here, the shaking got stronger, then weaker):
https://cdn.eatws.net/skip/events/ga2021sqogij/traces.png
Michael V said:
Seismograms. (As reported by others here, the shaking got stronger, then weaker):https://cdn.eatws.net/skip/events/ga2021sqogij/traces.png
Are they the seismology sensing stations scattered around?
sibeen said:
Michael V said:
Seismograms. (As reported by others here, the shaking got stronger, then weaker):https://cdn.eatws.net/skip/events/ga2021sqogij/traces.png
Are they the seismology sensing stations scattered around?
Yes. There is now quite a network in Australia.
Michael V said:
sibeen said:
Michael V said:
Seismograms. (As reported by others here, the shaking got stronger, then weaker):https://cdn.eatws.net/skip/events/ga2021sqogij/traces.png
Are they the seismology sensing stations scattered around?
Yes. There is now quite a network in Australia.
Surprised me how many there was close by.
sibeen said:
Michael V said:
sibeen said:Are they the seismology sensing stations scattered around?
Yes. There is now quite a network in Australia.
Surprised me how many there was close by.
https://earthquakes.ga.gov.au/
Here you can see how many stations recorded the earthquake and contributed to the dataset. (This map is just a subset of the stations – data collection also occurred as far away as Indonesia. Have a fiddle with the map.)
Felt reports…
https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
:-)~P
(I’ve only ever felt one earthquake.)
I was hoping to get a focal plane solution, but it looks like the USGS no longer publishes them. The shake-map indicates the possibility of nearly-pure dip-slip movement on a high angle fault that faces west-south-west.
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
…and in Perth and Katherine too :)
It looks like some building have been significantly damaged. Hopefully there are no serious injuries :(
Speedy said:
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
…and in Perth and Katherine too :)
Michael V said:
(I’ve only ever felt one earthquake.)
I felt the Newcastle earthquake here in Sydney, and another that woke me up during the night in Murrumbateman, with the epicentre nearby at Gunning.
Tamb said:
Speedy said:
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
…and in Perth and Katherine too :)
What is the star up near Katherine?
I think it’s a single report on the felt map. The others are all grouped.
Speedy said:
Tamb said:
Speedy said:…and in Perth and Katherine too :)
What is the star up near Katherine?I think it’s a single report on the felt map. The others are all grouped.
Speedy said:
Tamb said:
Speedy said:…and in Perth and Katherine too :)
What is the star up near Katherine?I think it’s a single report on the felt map. The others are all grouped.
^^
Michael V said:
sibeen said:
Michael V said:Yes. There is now quite a network in Australia.
Surprised me how many there was close by.
https://earthquakes.ga.gov.au/
Here you can see how many stations recorded the earthquake and contributed to the dataset. (This map is just a subset of the stations – data collection also occurred as far away as Indonesia. Have a fiddle with the map.)
Where do you find the stations to put them on the map? I can’t see it in the overlays. I went to that site as soon as the shake was mentioned here, but I don’t know how to work it properly.
Michael V said:
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
:-)~P
(I’ve only ever felt one earthquake.)
I was hoping to get a focal plane solution, but it looks like the USGS no longer publishes them. The shake-map indicates the possibility of nearly-pure dip-slip movement on a high angle fault that faces west-south-west.
I looove this forum! Need (?) a technical explanation? Someone will have it!
Speedy said:
Michael V said:(I’ve only ever felt one earthquake.)
I felt the Newcastle earthquake here in Sydney, and another that woke me up during the night in Murrumbateman, with the epicentre nearby at Gunning.
I have a vague recollection of the crockery rattling in Melbourne when I was a child.
I have read elsewhere that aftershocks were 5.5, 5.5 and 4. Is this correct?
Speedy said:
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
…and in Perth and Katherine too :)
I think the Perth one was just my 16 yr old slamming her bedroom door.
buffy said:
Michael V said:
sibeen said:Surprised me how many there was close by.
https://earthquakes.ga.gov.au/
Here you can see how many stations recorded the earthquake and contributed to the dataset. (This map is just a subset of the stations – data collection also occurred as far away as Indonesia. Have a fiddle with the map.)
Where do you find the stations to put them on the map? I can’t see it in the overlays. I went to that site as soon as the shake was mentioned here, but I don’t know how to work it properly.
Top right corner – “Earthquake details” – in that menu.
buffy said:
Michael V said:
Speedy said:
Felt reports…https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
FOMO is strong in QLD today.
:-)~P
(I’ve only ever felt one earthquake.)
I was hoping to get a focal plane solution, but it looks like the USGS no longer publishes them. The shake-map indicates the possibility of nearly-pure dip-slip movement on a high angle fault that faces west-south-west.
I looove this forum! Need (?) a technical explanation? Someone will have it!
It turns out I was wrong. It is near-pure strike-slip movement on a fault that is (likely) nearly north-south (351°).
Michael V said:
buffy said:
Michael V said:https://earthquakes.ga.gov.au/
Here you can see how many stations recorded the earthquake and contributed to the dataset. (This map is just a subset of the stations – data collection also occurred as far away as Indonesia. Have a fiddle with the map.)
Where do you find the stations to put them on the map? I can’t see it in the overlays. I went to that site as soon as the shake was mentioned here, but I don’t know how to work it properly.
Top right corner – “Earthquake details” – in that menu.
Thank you. I missed that bit.
Michael V said:
buffy said:
Michael V said::-)~P
(I’ve only ever felt one earthquake.)
I was hoping to get a focal plane solution, but it looks like the USGS no longer publishes them. The shake-map indicates the possibility of nearly-pure dip-slip movement on a high angle fault that faces west-south-west.
I looove this forum! Need (?) a technical explanation? Someone will have it!
It turns out I was wrong. It is near-pure strike-slip movement on a fault that is (likely) nearly north-south (351°).
I meant to provide the beachball (stereographic projection) from the USGS. It turns out that they still publish them. I looked for it before too quickly:
https://earthquake.usgs.gov/earthquakes/eventpage/us7000fd9v/moment-tensor
Well, despite reports from Adelaide of people feeling a tremor, I felt nothing here. And I was sitting here reading you lot at the time on a wheely stool, so if I was going to feel it, I should have.
buffy said:
Well, despite reports from Adelaide of people feeling a tremor, I felt nothing here. And I was sitting here reading you lot at the time on a wheely stool, so if I was going to feel it, I should have.
Then again…log trucks on the highway 50m from me…I may have just ignored a rumble out of habit.
Speedy said:
I have read elsewhere that aftershocks were 5.5, 5.5 and 4. Is this correct?
Original earthquake: M 5.8
M 4.2, M 3.1 aftershocks so far.
———————————————————————
https://earthquakes.ga.gov.au/
buffy said:
Well, despite reports from Adelaide of people feeling a tremor, I felt nothing here. And I was sitting here reading you lot at the time on a wheely stool, so if I was going to feel it, I should have.
I felt the tremors, and heard the house shaking, but didn’t hear any ground rumble (I’ve heard that before, even when I didn’t feel the quake.)
A video of some damage, apparently Melbourne.
https://twitter.com/tomsteinfort/status/1440458861975011331
LOL:
“Dan Andreas Fault.”
Dark Orange said:
A video of some damage, apparently Melbourne.
https://twitter.com/tomsteinfort/status/1440458861975011331
I know someone that lived upstairs above that shop. That side door was their front door. Twas 30 years, ago hey what but.
Dark Orange said:
LOL:
“Dan Andreas Fault.”
Who? What? Where?
Well it was largely strike-slip movement, and the San Andreas Fault is a strike-slip fault.
Michael V said:
Dark Orange said:LOL:
“Dan Andreas Fault.”
Who? What? Where?
Well it was largely strike-slip movement, and the San Andreas Fault is a strike-slip fault.
It’s a play on words, not a scientific explanation.
Dark Orange said:
Michael V said:
Dark Orange said:LOL:
“Dan Andreas Fault.”
Who? What? Where?
Well it was largely strike-slip movement, and the San Andreas Fault is a strike-slip fault.
It’s a play on words, not a scientific explanation.
… and there I was trying to make sense of MV’s witty comment :)
The red circles show the locations of the earthquake. About half way between Thomson dam and Eildon near Gaffneys Creek.
fsm said:
The red circles show the locations of the earthquake. About half way between Thomson dam and Eildon near Gaffneys Creek.
Not far from Kevington
Dark Orange said:
LOL:
“Dan Andreas Fault.”
LOL
fsm said:
The red circles show the locations of the earthquake. About half way between Thomson dam and Eildon near Gaffneys Creek.
Luckily there was no extra damage to the Gaffneys Creek Pub, that burnt down in the 90s.
Very unusual place for it.
dv said:
Very unusual place for it.
Why?
Dark Orange said:
LOL:
“Dan Andreas Fault.”
Very clever
sibeen said:
dv said:
Very unusual place for it.
Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
dv said:
Very unusual place for it.
Lachlan Fold belt. Lots of meridional strike-slip faults dating back as far as the Early Paleozoic. Some are still somewhat active (eg Gunning area, NSW – think Lake George).
dv said:
sibeen said:
dv said:
Very unusual place for it.
Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
Any fracking nearby ?
dv said:
sibeen said:
dv said:
Very unusual place for it.
Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
The fewer seismic events you have in an area, the greater the next one will be.
Cymek said:
dv said:
sibeen said:Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
Any fracking nearby ?
No. Wrong rocks.
dv said:
sibeen said:
dv said:
Very unusual place for it.
Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
It’s the only earthquake I’ve ever felt.
sibeen said:
dv said:
sibeen said:Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
It’s the only earthquake I’ve ever felt.
Weren’t you in Melbourne during the 1960s/70s? There are some in this list that you would have been there for. I suspect what I may be half remembering might be 1977, Balliang.
https://en.wikipedia.org/wiki/List_of_earthquakes_in_Australia
According to https://www.emsc-csem.org/Earthquake/earthquake.php?id=1039326, the focal depth was ~2km.
buffy said:
sibeen said:
dv said:Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
It’s the only earthquake I’ve ever felt.
Weren’t you in Melbourne during the 1960s/70s? There are some in this list that you would have been there for. I suspect what I may be half remembering might be 1977, Balliang.
https://en.wikipedia.org/wiki/List_of_earthquakes_in_Australia
I was around and 14 at the time, but I don’t remember it.
btm said:
According to https://www.emsc-csem.org/Earthquake/earthquake.php?id=1039326, the focal depth was ~2km.
USGS and GA have both put the focal depth at ~10 km.
UPDATE: Seven earthquakes recorded near Mansfield, Victoria
Geoscience Australia has updated its data to show there were five aftershocks within an hour of the magnitude-5.9 this morning.
There was also an aftershock early this afternoon.
Magnitude-5.9 at a depth of 10km at 9:15am
Magnitude-3.5 at depth of 6pm at 9:24am
Magnitude-4.1 at a depth of 12km at 9:33am
Magnitude-2.5 at depth of 6km at 9:47am
Magnitude-3.1 at a depth of 6km at 9:54am
Magnitude-2.4 at a depth of 6km at 10:15am
Magnitude-2.9 at a depth of 10km at 1:18pm
https://www.abc.net.au/news/2021-09-22/live-melbourne-earthquake-victoria-nsw-canberra/100481780
See Also:
https://earthquakes.ga.gov.au/?fbclid=IwAR3nYdYfF65DBZzvFNn-AQBnimY3xTXC9kr4QVTbIQEx1RLFkOX1QX5FMQU
must be the end times
Mansfield earthquake is one Victoria’s strongest in history
Geoscience Australia has adjusted today’s earthquake near Mansfield to magnitude-5.9.
That makes it one of the state’s strongest earthquakes in history.
Here’s a list of some of the biggest earthquakes in Victoria.
https://www.abc.net.au/news/2021-09-22/live-melbourne-earthquake-victoria-nsw-canberra/100481780
Dark Orange said:
dv said:
sibeen said:Why?
Just don’t get a lot of earthquakes with an epicentre in northern Victoria.
Indeed this is by far the strongest onshore quake in Victoria this century.
The fewer seismic events you have in an area, the greater the next one will be.
No
Speedy said:
Michael V said:(I’ve only ever felt one earthquake.)
I felt the Newcastle earthquake here in Sydney, and another that woke me up during the night in Murrumbateman, with the epicentre nearby at Gunning.
I’ve felt only two earthquakes before. One in Sydney in the 1960s. Then a really tidgy one in Melbourne that just made the back windows rattle a bit. This is the biggest I’ve been in, the computer desk swayed 10 cm back and forth on a north-south axis. But that was because of resonance, the floor swayed less than that.
Any aftershocks yet?
M 5.9 – 38 km S of Mount Buller, Australia 2021-09-21 23:15:53 (UTC)37.491°S 146.363°E10.0 km depth
https://earthquake.usgs.gov/earthquakes/eventpage/us7000fd9v/map
Contribute to science by filling in an earthquake observation report at https://earthquake.usgs.gov/earthquakes/eventpage/us7000fd9v/tellus
Here’s part of my report
And results from “have you felt it” contributors.
Michael V said:
Michael V said:
buffy said:I looove this forum! Need (?) a technical explanation? Someone will have it!
It turns out I was wrong. It is near-pure strike-slip movement on a fault that is (likely) nearly north-south (351°).
I meant to provide the beachball (stereographic projection) from the USGS. It turns out that they still publish them. I looked for it before too quickly:
https://earthquake.usgs.gov/earthquakes/eventpage/us7000fd9v/moment-tensor
Here, postcode 3192, the movement was nearly N-S, the floor shook 7 cm back and forth. The computer desk resonance amplified that to 10 cm back.and forth.
dv said:
Ha
dv said:
LOLOLOLOL
Bloody CFMEU, I guess the construction workers will be needed back on the job ASAP. SO much for the lockdown.
They are saying it is the biggest Earthquake ever recorded onshore Victoria, and at least 3 times the energy of any quake in Victoria since the turn of the millennium.
dv said:
They are saying it is the biggest Earthquake ever recorded onshore Victoria, and at least 3 times the energy of any quake in Victoria since the turn of the millennium.
Thanks.
But, um, “turn of the millenium” was not that long ago. I think they mean “since records began”.
mollwollfumble said:
dv said:
They are saying it is the biggest Earthquake ever recorded onshore Victoria, and at least 3 times the energy of any quake in Victoria since the turn of the millennium.
Thanks.
But, um, “turn of the millenium” was not that long ago. I think they mean “since records began”.
According to MV’s list there was a magnitude 5.7 quake in 1960’s, so they don’t mean “since records began”. 1/3 the magnitude of 5.8 is 5.32, so they may be using a different measure of the energy.
Some headlines:
Adelaide Now:
/how-the-world-reported-on-melbournes-earthquake-australians-surprisingly-unfazed/
Radio Havana:
rare-australian-earthquake-triggers-panic-in-melbourne
The Australian:
victorian-earthquake-leaves-a-war-zone-in-melbourne
That seems to pretty well cover all the possibilities.
p.s.
Anyone here from Sydney feel it? We didn’t.
The Rev Dodgson said:
Some headlines:Adelaide Now:
/how-the-world-reported-on-melbournes-earthquake-australians-surprisingly-unfazed/Radio Havana:
rare-australian-earthquake-triggers-panic-in-melbourneThe Australian:
victorian-earthquake-leaves-a-war-zone-in-melbourneThat seems to pretty well cover all the possibilities.
p.s.
Anyone here from Sydney feel it? We didn’t.
I couldn’t get away from the supermarket checkout woman. She was very excited to have felt it here. I didn’t feel a thing but then I’m even further north and reportedly people outside noticd it more than people who were inside at the time.
roughbarked said:
The Rev Dodgson said:
Some headlines:Adelaide Now:
/how-the-world-reported-on-melbournes-earthquake-australians-surprisingly-unfazed/Radio Havana:
rare-australian-earthquake-triggers-panic-in-melbourneThe Australian:
victorian-earthquake-leaves-a-war-zone-in-melbourneThat seems to pretty well cover all the possibilities.
p.s.
Anyone here from Sydney feel it? We didn’t.
I couldn’t get away from the supermarket checkout woman. She was very excited to have felt it here. I didn’t feel a thing but then I’m even further north and reportedly people outside noticd it more than people who were inside at the time.
Where are you?
The Rev Dodgson said:
roughbarked said:
The Rev Dodgson said:
Some headlines:Adelaide Now:
/how-the-world-reported-on-melbournes-earthquake-australians-surprisingly-unfazed/Radio Havana:
rare-australian-earthquake-triggers-panic-in-melbourneThe Australian:
victorian-earthquake-leaves-a-war-zone-in-melbourneThat seems to pretty well cover all the possibilities.
p.s.
Anyone here from Sydney feel it? We didn’t.
I couldn’t get away from the supermarket checkout woman. She was very excited to have felt it here. I didn’t feel a thing but then I’m even further north and reportedly people outside noticd it more than people who were inside at the time.
Where are you?
North of Griffith. Not far from the fabled black stump.
roughbarked said:
The Rev Dodgson said:
roughbarked said:I couldn’t get away from the supermarket checkout woman. She was very excited to have felt it here. I didn’t feel a thing but then I’m even further north and reportedly people outside noticd it more than people who were inside at the time.
Where are you?
North of Griffith. Not far from the fabled black stump.
I felt nothing. I was inside sitting down reading the forum when moll announced he was shaking and sibeen confirmed it. Perhaps the basalt plains between the high country and here absorbed it or something.
buffy said:
roughbarked said:
The Rev Dodgson said:Where are you?
North of Griffith. Not far from the fabled black stump.
I felt nothing. I was inside sitting down reading the forum when moll announced he was shaking and sibeen confirmed it. Perhaps the basalt plains between the high country and here absorbed it or something.
Yes. It is likely that some areas were more easily transmitted to.
roughbarked said:
buffy said:
roughbarked said:North of Griffith. Not far from the fabled black stump.
I felt nothing. I was inside sitting down reading the forum when moll announced he was shaking and sibeen confirmed it. Perhaps the basalt plains between the high country and here absorbed it or something.
Yes. It is likely that some areas were more easily transmitted to.
I always think of you as being just South of the Queensland border.
I think we can blame PWM for that.
The Rev Dodgson said:
roughbarked said:
buffy said:I felt nothing. I was inside sitting down reading the forum when moll announced he was shaking and sibeen confirmed it. Perhaps the basalt plains between the high country and here absorbed it or something.
Yes. It is likely that some areas were more easily transmitted to.
I always think of you as being just South of the Queensland border.
I think we can blame PWM for that.
Nay, I’m between Griffith and Merriwagga.
roughbarked said:
The Rev Dodgson said:
roughbarked said:Yes. It is likely that some areas were more easily transmitted to.
I always think of you as being just South of the Queensland border.
I think we can blame PWM for that.
Nay, I’m between Griffith and Merriwagga.
Basically about 70km from Gunbar.
Ten aftershocks now, latest just after 8 am:
https://earthquakes.ga.gov.au/
Michael V said:
Ten aftershocks now, latest just after 8 am:https://earthquakes.ga.gov.au/
Thanks for that.
So, apart from the second largest, they basically lie in a line lying slightly west of N to slightly east of S.
Perhaps the second largest on a parallel fault?
I’ve felt 2 in my lifetime
the first woke me from a sound sleep
I dreamed that our 2nd floor front porch came away
the second sounded and felt like an over loaded truck and hit a bump
Latest of 16 aftershocks, just after 7 am:
Just had this in my e-mail:
Just following on from your comments on the correspondence of damage potential and geotechnical conditions, I just wanted to point members to GA’s online felt reports for the event. We received almost 43,000 felt reports for the event (an absolutely amazing citizen science contribution!), which we were able to use to estimate Modified Mercalli Intensities, aggregated at several spatial scales (20, 10, 5 & 1 km). Whilst I acknowledge there may be some uncertainties around unverified responses from citizens, studies elsewhere in the world have found that they are remarkably reliable, to the first order. To view the reported intensities, click on the link below, scroll to the bottom of the panel on the right, and click on “Felt Grid” – then zoom in to your area of interest.
https://earthquakes.ga.gov.au/event/ga2021sqogij
The Rev Dodgson said:
Just had this in my e-mail:Just following on from your comments on the correspondence of damage potential and geotechnical conditions, I just wanted to point members to GA’s online felt reports for the event. We received almost 43,000 felt reports for the event (an absolutely amazing citizen science contribution!), which we were able to use to estimate Modified Mercalli Intensities, aggregated at several spatial scales (20, 10, 5 & 1 km). Whilst I acknowledge there may be some uncertainties around unverified responses from citizens, studies elsewhere in the world have found that they are remarkably reliable, to the first order. To view the reported intensities, click on the link below, scroll to the bottom of the panel on the right, and click on “Felt Grid” – then zoom in to your area of interest.
https://earthquakes.ga.gov.au/event/ga2021sqogij
I see they have deleted the felt reports from Perth and Katherine :)
Speedy said:
The Rev Dodgson said:
Just had this in my e-mail:Just following on from your comments on the correspondence of damage potential and geotechnical conditions, I just wanted to point members to GA’s online felt reports for the event. We received almost 43,000 felt reports for the event (an absolutely amazing citizen science contribution!), which we were able to use to estimate Modified Mercalli Intensities, aggregated at several spatial scales (20, 10, 5 & 1 km). Whilst I acknowledge there may be some uncertainties around unverified responses from citizens, studies elsewhere in the world have found that they are remarkably reliable, to the first order. To view the reported intensities, click on the link below, scroll to the bottom of the panel on the right, and click on “Felt Grid” – then zoom in to your area of interest.
https://earthquakes.ga.gov.au/event/ga2021sqogij
I see they have deleted the felt reports from Perth and Katherine :)
LOL
Speedy said:
The Rev Dodgson said:
Just had this in my e-mail:Just following on from your comments on the correspondence of damage potential and geotechnical conditions, I just wanted to point members to GA’s online felt reports for the event. We received almost 43,000 felt reports for the event (an absolutely amazing citizen science contribution!), which we were able to use to estimate Modified Mercalli Intensities, aggregated at several spatial scales (20, 10, 5 & 1 km). Whilst I acknowledge there may be some uncertainties around unverified responses from citizens, studies elsewhere in the world have found that they are remarkably reliable, to the first order. To view the reported intensities, click on the link below, scroll to the bottom of the panel on the right, and click on “Felt Grid” – then zoom in to your area of interest.
https://earthquakes.ga.gov.au/event/ga2021sqogij
I see they have deleted the felt reports from Perth and Katherine :)
Yeah well, notoriously unreliable..
The Rev Dodgson said:
Just had this in my e-mail:Just following on from your comments on the correspondence of damage potential and geotechnical conditions, I just wanted to point members to GA’s online felt reports for the event. We received almost 43,000 felt reports for the event (an absolutely amazing citizen science contribution!), which we were able to use to estimate Modified Mercalli Intensities, aggregated at several spatial scales (20, 10, 5 & 1 km). Whilst I acknowledge there may be some uncertainties around unverified responses from citizens, studies elsewhere in the world have found that they are remarkably reliable, to the first order. To view the reported intensities, click on the link below, scroll to the bottom of the panel on the right, and click on “Felt Grid” – then zoom in to your area of interest.
https://earthquakes.ga.gov.au/event/ga2021sqogij
Hmm…I see a report of “moderate” from Hamilton and also near Dunkeld. And also a “strong” down South of us here. I think I’d question that. I know, just because I didn’t feel it, doesn’t mean no-one did…but moderate and strong?
And there seems to be a “violent” level report in the Tassie highlands.
buffy said:
The Rev Dodgson said:
Just had this in my e-mail:Just following on from your comments on the correspondence of damage potential and geotechnical conditions, I just wanted to point members to GA’s online felt reports for the event. We received almost 43,000 felt reports for the event (an absolutely amazing citizen science contribution!), which we were able to use to estimate Modified Mercalli Intensities, aggregated at several spatial scales (20, 10, 5 & 1 km). Whilst I acknowledge there may be some uncertainties around unverified responses from citizens, studies elsewhere in the world have found that they are remarkably reliable, to the first order. To view the reported intensities, click on the link below, scroll to the bottom of the panel on the right, and click on “Felt Grid” – then zoom in to your area of interest.
https://earthquakes.ga.gov.au/event/ga2021sqogij
Hmm…I see a report of “moderate” from Hamilton and also near Dunkeld. And also a “strong” down South of us here. I think I’d question that. I know, just because I didn’t feel it, doesn’t mean no-one did…but moderate and strong?
And there seems to be a “violent” level report in the Tassie highlands.
The rest of the e-mail:
I personally cannot see any obvious trends within Melbourne that might account for the damage seen on Chapel St, but note that the smallest 1-km resolution may still be too coarse to see such details. Note that there may be some isolated cells that indicate higher intensities than surrounding cells, but oftentimes when you click on these cells, they may only contributed from a single response. As such I would not consider them to be overly reliable without further verification.
No doubt, we’ll be learning a lot more from these data in the years to come!
No new aftershocks since early yesterday morning:
Image showing main earthqsuake and all aftershocks recorded so far:
This morning’s earthquake in western Victoria and it’s aftershocks:
Channel 7 News this evening claimed the earthquake today was an aftershock of the Mansfield earthquake. This map demonstrates haw far away the earthquakes were.
Most unlikely, Channel 7…
Yesterday’s western Victoria earthquake has had an aftershock at 48 km depth. This is quite unusual. That should be well below the brittle-ductile transition. Magma??? Now, wouldn’t that be interesting!
:)
Michael V said:
Yesterday’s western Victoria earthquake has had an aftershock at 48 km depth. This is quite unusual. That should be well below the brittle-ductile transition. Magma??? Now, wouldn’t that be interesting!:)
Isn’t there lava coming up under the sea offshore from Mount Gambier? Or am I making things up?
buffy said:
Michael V said:
Yesterday’s western Victoria earthquake has had an aftershock at 48 km depth. This is quite unusual. That should be well below the brittle-ductile transition. Magma??? Now, wouldn’t that be interesting!:)
Isn’t there lava coming up under the sea offshore from Mount Gambier? Or am I making things up?
Maybe it’s magma and not lava?
buffy said:
Michael V said:
Yesterday’s western Victoria earthquake has had an aftershock at 48 km depth. This is quite unusual. That should be well below the brittle-ductile transition. Magma??? Now, wouldn’t that be interesting!:)
Isn’t there lava coming up under the sea offshore from Mount Gambier? Or am I making things up?
I don’t know But it wouldn’t surprise me.
There have been three aftershocks in the last 7 days, all small. The latest was yesterday.
A new aftershock from the Murrayville (western Victoria) cluster this evening, a few minutes ago.
The latest aftershock, this evening.
