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#1108651 - 08/06/2012 22:08 Earthquake
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2057
Loc: Manilla, near Tamworth NSW
I am sure I felt an earthquake just now.
In Manilla, NSW, in a house on a concrete slab on bedrock.
Time 21:31 EST, 8 June 2012, two sharp shocks 10 seconds apart, with shaking fading over several seconds.
Time 21:33 EST, 8 June 2012, two sharp shocks 10 seconds apart, the second one stronger, with shaking fading over several seconds.
The house shook, and double-glazed windows rattled.

I tried to access Geosciences Australia's earthquake reporting website, but got: "The connection to www.ga.gov.au was interrupted."
http://www.ga.gov.au/earthquakes/staticPageController.do?page=felt-earthquake
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#1108652 - 08/06/2012 22:11 Re: Earthquake [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2057
Loc: Manilla, near Tamworth NSW
_________________________
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#1108654 - 08/06/2012 22:15 Re: Earthquake [Re: Surly Bond]
explorer Offline
Weather Freak

Registered: 29/01/2011
Posts: 522
Loc: Coolum Beach, Qld
Yes, it shows in this link:

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usb000aagx.php

Must have posted almost same time ... I am deleting this one .. . if I can ...



Edited by explorer (08/06/2012 22:16)

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#1108659 - 08/06/2012 22:29 Re: Earthquake [Re: explorer]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2057
Loc: Manilla, near Tamworth NSW
The epicentre plots near "Manilla Ski Gardens" at the north end of Lake Keepit, but I see that the Uncertainty of Location means it could be right here at Manilla. The shocks were very sharp, like a truck running into the house.
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#1108660 - 08/06/2012 22:37 Re: Earthquake [Re: Surly Bond]
Orion Offline
Weather Freak

Registered: 13/02/2001
Posts: 141
Loc: Tamworth NSW Australia
http://www.ga.gov.au/earthquakes/ or From: USGS ENS [mailto:ens@usgs.gov]
Sent: 8 June 2012 10:00 PM
To: jbart1@bigpond.net.au
Subject: 2012-06-08 11:31:05 (Mb 4.3) NEW SOUTH WALES, AUSTRALIA -30.8 150.5 (4d29a)


4.3 Mb - NEW SOUTH WALES, AUSTRALIA
Preliminary Earthquake Report
Magnitude
4.3 Mb
Date-Time
• 8 Jun 2012 11:31:05 UTC
• 8 Jun 2012 21:31:05 near epicenter
• 8 Jun 2012 21:31:05 standard time in your timezone
Location
30.773S 150.540E
Depth
17 km
Distances
• 278 km (173 miles) NNW (337 degrees) of Lake Macquarie, Australia
• 280 km (174 miles) NNW (332 degrees) of Newcastle, Australia
• 351 km (218 miles) N (350 degrees) of Sydney, Australia
• 520 km (323 miles) NNE (15 degrees) of CANBERRA, Australia
Location Uncertainty
Horizontal: 18.4 km; Vertical 8.2 km
Parameters
Nph = 0; Dmin = 0.0 km; Rmss = 2.48 seconds; Gp = 0°
M-type = Mb; Version = 3
Event ID
US b000aagx
For updates, maps, and technical information, see:
Event Page
or
USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey
http://neic.usgs.gov/
Disclaimer
This email was sent to jbart1@bigpond.net.au You requested mail for events within the 'Oz' region for M2.0 at all times. To change your parameters or unsubscribe, go to: https://sslearthquake.usgs.gov/ens/

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#1108661 - 08/06/2012 22:41 Re: Earthquake [Re: Orion]
Orion Offline
Weather Freak

Registered: 13/02/2001
Posts: 141
Loc: Tamworth NSW Australia
2 distinct shakes in Tamworth, about 30 secs apart. House shook, rumbling noise like a train and every dog in the neighbourhood howling. No damage but instant reminder of Newcastle when I was tossed out of a bed in Woolongong!!!!!

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#1108666 - 08/06/2012 23:15 Re: Earthquake [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2057
Loc: Manilla, near Tamworth NSW
Armidale sesmograms are here:
http://www.ga.gov.au/earthquakes/getQuakeDetails.do?quakeId=3222740&orid=610467&sta=ARMA
The two shocks were 13 seconds apart, when I had guessed 10. And the second set was not quite two minutes later.
_________________________
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#1108667 - 08/06/2012 23:18 Re: Earthquake [Re: Orion]
Seabreeze Offline
Weatherzone Moderator

Registered: 18/09/2005
Posts: 10103
Loc: South West Rocks, NSW
4.3! That's a fair shake. Uni friends in Armidale and Tamworth are saying they felt the earthquake.
Never felt an earthquake before, makes me wish I was still up there just to experience it.
_________________________
South West Rocks, NSW Mid North Coast:
July 2017 Rainfall: 11.2mm (Jul Avg. 76.8mm) // July 2017 Raindays: 3 (Jul Avg. 8.2 raindays)
Year-to-date Rainfall: 1243.4mm (Jan-Jul Avg. 1018.3mm) // Year-to-date Raindays: 103 (Jan-Jul Avg. 85.6 raindays)

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#1108669 - 08/06/2012 23:21 Re: Earthquake [Re: Seabreeze]
Orion Offline
Weather Freak

Registered: 13/02/2001
Posts: 141
Loc: Tamworth NSW Australia
Enough of a shake to head outside!!!!!

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#1108672 - 08/06/2012 23:22 Re: Earthquake [Re: Orion]
Orion Offline
Weather Freak

Registered: 13/02/2001
Posts: 141
Loc: Tamworth NSW Australia
My initial thought for 2 secs,,,,, what...... thats coming from below, an earthquake.......... in Tamworth.......thats not stopping.... outside

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#1108679 - 09/06/2012 02:07 Re: Earthquake [Re: Orion]
Seabreeze Offline
Weatherzone Moderator

Registered: 18/09/2005
Posts: 10103
Loc: South West Rocks, NSW
According to this article, it is the first earthquake stronger than magnitude 4 in the region since December 1969:
http://au.news.yahoo.com/a/-/latest/13910012/two-earthquakes-shake-northern-nsw/

Relatives at Barraba felt the quake, and two friends in Uralla felt it as well.
From your report Orion and from others I know in Tamworth, it sounds like it was a fairly unsettling experience. Some were not keen on going back to bed.
_________________________
South West Rocks, NSW Mid North Coast:
July 2017 Rainfall: 11.2mm (Jul Avg. 76.8mm) // July 2017 Raindays: 3 (Jul Avg. 8.2 raindays)
Year-to-date Rainfall: 1243.4mm (Jan-Jul Avg. 1018.3mm) // Year-to-date Raindays: 103 (Jan-Jul Avg. 85.6 raindays)

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#1108724 - 09/06/2012 17:30 Re: Earthquake [Re: Seabreeze]
Seabreeze Offline
Weatherzone Moderator

Registered: 18/09/2005
Posts: 10103
Loc: South West Rocks, NSW
Originally Posted By: The Northern Daily Leader
EMERGENCY services were inundated with calls last night as an earthquake shook a large section of the North West.

The 4.2 magnitude quake hit just after 9.30pm and was felt across the region, including Tamworth, Manilla, Gunnedah, Barraba, Tingha, Armidale, Uralla, Inverell and Tambar Springs.

In Tamworth it was felt as two sharp tremors, about 30 seconds apart.

One resident said the second tremor felt like “something hit the house”.

A spokesman for Geoscience Australia told The Leader the quake was 52km north west of Tamworth, near Manilla, 17km under the surface.

He said it was caused by movement of rock along a local fault line and it was possible some smaller tremors, or aftershocks, may be felt in the next few days.

Australia felt these type of quakes “fairly regularly”, he said, but in the past 10 years in NSW there’s only been two earthquakes of last night’s size – one in Cowra and another in Bowral.

Police were swamped by hundreds of calls from concerned residents, but there had been no reports of damage or injuries when The Leader went to press last night.

Linky: http://www.northerndailyleader.com.au/ne...226.aspx?page=2

It will probably be the lead story on Prime and NBN Local News this evening across the New England - North West. The earthquake was the second news item on Ten News this evening.

As relatives in Barraba described the quake (with one word substituted, lol): 'Scared the living "poop" out of us. Shook us and the house.'

Part of Geological Map of Australia (zoomed in to NE NSW). The thick black lines are fault lines, if you want to know what the colours stand for I can PM you (Railways are also shown on the map)

(Macquarie World Atlas, 1998, p. 151)

Earthquake Risk map (Cream = Very Low Risk, Apricot = Low Risk, Orange = Moderate Risk, Dark Orange = High risk):

(Macquarie World Atlas, 1998, p. 171)
_________________________
South West Rocks, NSW Mid North Coast:
July 2017 Rainfall: 11.2mm (Jul Avg. 76.8mm) // July 2017 Raindays: 3 (Jul Avg. 8.2 raindays)
Year-to-date Rainfall: 1243.4mm (Jan-Jul Avg. 1018.3mm) // Year-to-date Raindays: 103 (Jan-Jul Avg. 85.6 raindays)

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#1109700 - 15/06/2012 23:51 Re: Earthquake [Re: Seabreeze]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2057
Loc: Manilla, near Tamworth NSW
Something funny has happened to Manilla's earthquake of the 8th of June.

The US Geological survey and Geoscience Australia initially agreed that the epicentre was 17 km west of Manilla and 17 km deep. A seismogram from Armidale was published showing a time of 11:31:05 UTC, with another, slightly larger shock two minutes later. This agrees with What Orion copied from Geoscience Australia, and what I observed at Manilla.
Now Geoscience Australia denies this:
http://www.ga.gov.au/earthquakes/getQuakeDetails.do?quakeId=3223789&orid=2156260&sta=
GA says the earthquake was at 11:32:39 UTC, a time between the two shocks stated earlier - a large error. It says the location is at coordinates that are 30 km west of Manilla (which could be an improved estimate) but that the depth and most other data, including seismograms, are "not available", even though the Solution is "Finalised" as of 12 June.

I feel that we ought to be told why the data is "not available".

The US Geological Survey is sticking by their analysis, which has been "REVIEWED".
http://earthquake.usgs.gov/earthquakes/eventpage/usb000aagx#technical
However, seismograms are now "not available" although the Armidale seismogram was previously published on this page, as I linked above.
_________________________
Data are cheap; information is expensive!

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#1109704 - 16/06/2012 01:11 Re: Earthquake [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2057
Loc: Manilla, near Tamworth NSW
The new estimate for position of the earthquake gives a plausible link to a major fault.
It is only 13 km east of the Hunter-Mooki Fault, also known as the Mooki Thrust (the most western black line on Seabreeze's geological map).
That fault plane dips east at about 1 km depth for 2 km horizontally. So a vertical line from the estimated epicentre would meet the fault about 6 or 7 km below.
The Mooki Thrust is a very important geological boundary. All our coal is west of the thrust, here in Permian rocks. East of the thrust are older rocks that are more folded. The older rocks have been pushed up over the coal-bearing rocks, and perhaps are still moving up over them today. I don't understand the conventional diagram well enough to know whether the movement in the earthquake was in that sense.
_________________________
Data are cheap; information is expensive!

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#1110094 - 19/06/2012 21:05 Re: Earthquake [Re: Surly Bond]
TheAnt Offline
Weatherzone Addict

Registered: 16/11/2011
Posts: 1441
No details of this one but I just had a big shake in Melbourne!

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#1110096 - 19/06/2012 21:07 Re: Earthquake [Re: TheAnt]
liberator Offline
Weather Freak

Registered: 28/11/2010
Posts: 288
Loc: Kyabram
didn't feel itmyself but friends of my daughter reported on facebook feeling it in our home town

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#1110097 - 19/06/2012 21:08 Re: Earthquake [Re: TheAnt]
Ruckle Offline
Meteorological Motor Mouth

Registered: 03/08/2005
Posts: 6079
Loc: Woodend VIC 579m ASL - where w...
Originally Posted By: TheAnt
No details of this one but I just had a big shake in Melbourne!


Yes, what the hell was that???
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#1110099 - 19/06/2012 21:17 Re: Earthquake [Re: Ruckle]
liberator Offline
Weather Freak

Registered: 28/11/2010
Posts: 288
Loc: Kyabram

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#1110101 - 19/06/2012 21:21 Re: Earthquake [Re: liberator]
Madmel Offline
Weatherzone Addict

Registered: 16/10/2006
Posts: 2124
Loc: Tarneit (Werribee), Victoria
Felt it here in Werribee..news feed on facebook going nuts with reports of feeling it all over Victoria..say central to eastern Vic

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#1110108 - 19/06/2012 21:36 Re: Earthquake [Re: Madmel]
aussiestormfreak Offline
Meteorological Motor Mouth

Registered: 02/02/2011
Posts: 5718
Loc: Melbourne (Belgrave); Corryong...
Felt the 5.2 tremor here in the Belgrave area... I hear according to the Herald Sun it was felt as far away as Tallangatta, I wonder if that means Corryong felt it too? smile


http://www.heraldsun.com.au/news/more-news/strong-tremors-rock-victoria/story-fn7x8me2-1226401623358

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