Quake Watch 2012

Not sure why I can't find this 4.0 earthquake in China (June 18) on USGS.
www.cea.gov.cn...

Prov,Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
emsc,2012-06-18 22:09:51, 39.210, 6.384, 5.3, 80.0, Western Mediterranean Sea

Just thought it was interesting. Off the west of Sardinia.

reply to post by bobrules


Because it is a 4.0 and by default unless significant the minimum quake the USGS looks at outside of the US and territories is 4.5 magnitude.

By the way about the same goes for EMSC outside Europe.

Here is a puzzler. A quake near Vanuatu - possibly or even probably a teleseism - at 06:06+ today and clearly visible on SANVU: SANVU.G.00.BHZ.2012.170

Not too far away in the ND network it is just visible still: LIFNC.ND.00.HHZ.2012.170

ETA 588 km between those 2 seismos so not that close. Nothing at HNR either.

Nothing reported for this time, or for earlier that could be it, from USGS, EMSC, GFZ or Vanuatu Geohazards Observatory. Anyone got any ideas???






HNZ channel there: SANVU.G.00.HNZ.2012.170 and HHZ channel: SANVU.G.00.HHZ.2012.170

Looks busy!



Definitely a telesism - I am guessing around 200 km distant or more - can't see a clear P/S

Low flat signal over a longish time.



Frequency, after a bit of noise removal, looks good for a distant quake.



And it sounds good as well: dl.dropbox.com...

reply to post by PuterMan


could be this one 4.7 North of Fiji
yeah I know, its siesme.nc, but hey the time matches and all they are doing is what the rest do, try and figure it out from the graphs.

edit:I'll run it through the TravelTimCalc and see if it matches the SANVU trace


Hmmm inconclusive
travel arrival time
code - time(s) - dy hr mn sec
Pn - 135.43 - 0 6 6 47
S - 245.69 - 0 6 8 37

the S wave looks earlier than that on the graph

heres the full result TTC

reply to post by muzzy


Yup I think you are right. That seems to match. Wonder why that was not on the Vanuatu observatory - or anyone else for that matter.

Thanks.

ETA: I see my problem is probably the depth. I was not accounting for that.

reply to post by muzzy


NOT inconclusive at all. If I am reading that right you show 06:06:47 arrival.

Look at this - right on the button!



Here is the full trace

reply to post by PuterMan

Wow thats pretty accurate
how did you get the trace so well defined?

It was the S wave that threw me off. at 06:08 whatever, well past the end of the trace you are showing

Maybe we dismissed sieme.nc too quickly eh.

They do get some wild locations though sometimes

reply to post by muzzy

Wow thats pretty accurate
how did you get the trace so well defined?

I can either look at it in my program - expanding it as needed - or that particular one was after transfer to Audacity

Maybe we dismissed sieme.nc too quickly eh.

They do get some wild locations though sometimes

They certainly do but they seem to be the only ones who picked this up. There also seems to be quite a lot of activity in the area which is being missed. I shall have a look in a couple of days and see what I can identity. I think the problem is that SANVU is out there on it's own. Two more instruments are needed to triangulate and the NC ones are a bit far away.

SANVU BHZ and HNZ channels side by side





USGS have come up with one early this morning - a Mag 4.5 just off Espiritu Santu, Vanuatu

USGS

Magnitude 4.5
Date-Time

Tuesday, June 19, 2012 at 00:29:16 UTC
Tuesday, June 19, 2012 at 11:29:16 AM at epicenter
Time of Earthquake in other Time Zones

Location 14.952°S, 167.790°E
Depth 262.6 km (163.2 miles)
Region VANUATU
Distances 80 km (49 miles) E of Port-Olry, Vanuatu
93 km (57 miles) NE of Luganville, Vanuatu
313 km (194 miles) N of Port-Vila, Vanuatu
662 km (411 miles) N of We, New Caledonia
Location Uncertainty horizontal +/- 32.6 km (20.3 miles); depth +/- 15.2 km (9.4 miles)
Parameters NST= 18, Nph= 19, Dmin=>999 km, Rmss=0.94 sec, Gp=112°,
M-type=body wave magnitude (Mb), Version=3
Source

Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)

Event ID usb000aj98

Deep like the other one. This is the big splodge that starts off blue on the seismogram: SANVU.G.00.HNZ.2012.171

Just had a little shake here in melbourne, australia a couple mins ago. very minor. Its been awhile.

No news on USGS yet.

Reports coming in
www.heraldsun.com.au...






USGS
earthquake.usgs.gov...

I live about 120km's northwest(ish) from the epicentre, - it felt like a wave.

Originally posted by one_small_step
Just had a little shake here in melbourne, australia a couple mins ago. very minor. Its been awhile.

No news on USGS yet.

Reports coming in
www.heraldsun.com.au...

edit on 19-6-2012 by one_small_step because: (no reason given)

USGS
earthquake.usgs.gov...

I live about 30km's northwest(ish) from the epicentre, - it felt like a wave.

edit on 19-6-2012 by one_small_step because: more info

early reports of a 5.2. bloody decent size for here.

EQ-20120619-254428-AUS
Magnitude: 5.2
Mercalli scale: 5
Date-Time [UTC]: Tuesday, 19th June 2012 at 10:53 AM
Local Date/Time: Tuesday, June 19, 2012 at 20:53 in the evening at epicenter
Coordinate: 38° 14.640, 146° 11.622
Depth: 9.90 km (6.15 miles)
Hypocentrum: Shallow depth
Class: Moderate
Region: Australia
Country: Australia
Location: 3.53 km (2.19 miles) S of Narracan, State of Victoria, Australia
Source: USGS
Generated Tsunami: Not or no data
Damage: Not or no data
The potential impact of the earthquake
Almost everyone feels movement. Sleeping people are awakened. Doors swing open or close. Dishes are broken. Pictures on the wall move. Small objects move or are turned over. Trees might shake. Liquids might spill out of open containers.



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reply to post by bellagirl


Rare as hens teeth

Impressive though. Haven't felt one for years.

Originally posted by one_small_step
reply to post by bellagirl

 

Rare as hens teeth

Impressive though. Haven't felt one for years.

i remember feeling the newcastle quake 20 years ago. only one i have ever felt.

upgraded to a 5.5

biggest now to hit victoria in 109 years. report of damage but no injuries.

im west morwell(approx 15-20km from eppi) it was a gooden, the one we had last year? me no think good, was a gentle gentle sway sway compaired, this one had a good up and down and a deacent side to side

Originally posted by bellagirl
biggest now to hit victoria in 109 years. report of damage but no injuries.

heres hoping thats the last one for awhile. I don't need reminding how mother nature can get all "punchy" on us

reply to post by bellagirl


felt it here in the eastern suburbs of melbourne. i was brushing my teeth and the wall mirror started shaking and i thought my brother must have knocked something over. very odd feeling.

No aftershocks so hopefully people will be able to get some sleep.

Had friends on FB saying their pets were freaking out before it happened.