Quake Watch 2011

reply to post by TrueAmerican


Yep that would tie in with my experience of our Cook Strait and Tararua Mts mag 4's, they are about 50km away and 50km deep so there is time for the sound to get here first.
I can't remember if the 2 x Mag 6's we had in 2005 and 2006 had sound I just remember I actually got out of bed for those
Also we had a 4.9 not more than 5km from my house during the night, and didn't feel a thing, so at 50km deep it the shock/pressure wave probably went out at an acute angle and missed us completely. Often the epicentre itself doesn't get much damage.

reply to post by muzzy


Sorry meant to reply

Primary?
Hmmm could be, but I wondered why it didn't stand for "Pressure"

It does. Either P= Primary or Pressure, S= Secondary or Shear.

Rayleigh and Love (sounds like a singing duo or a firm of solicitors) waves are the ones that really do the damage - the surface waves.

I'm reading that there's also been a 6.8 almost immediately following the 6.2 but nothing mentioned on USGS?

Thursday September 22 2011, 23:07:04 UTC 20 minutes ago Tonga 6.8

Only place I can find anything so far: LINK

reply to post by TrueAmerican

As to deflection and refraction, I am not sure what portion of waves are actually detoured in this way.

Well sometimes most of them. A P wave can change into an S wave and back again in the core!

Any rock boundary can deflect the waves and shale - USA - has lots of rock boundaries, as does NZ.

Wow this is new

earthquake.usgs.gov...

Magnitude 3.6
Date-Time

Thursday, September 22, 2011 at 23:32:09 UTC
Thursday, September 22, 2011 at 06:32:09 PM at epicenter
Time of Earthquake in other Time Zones

Location 36.799°N, 90.781°W
Depth 16.5 km (10.3 miles)
Region SOUTHEASTERN MISSOURI
Distances

5 km (3 miles) SE (132°) from Grandin, MO
15 km (10 miles) S (191°) from Ellsinore, MO
20 km (12 miles) N (11°) from Doniphan, MO
201 km (125 miles) NNW (339°) from Memphis, TN
209 km (130 miles) SSW (193°) from St. Louis, MO

Location Uncertainty horizontal +/- 0.8 km (0.5 miles); depth +/- 0.6 km (0.4 miles)
Parameters NST= 24, Nph= 29, Dmin=31 km, Rmss=0.31 sec, Gp=130°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=B
Source

Cooperative New Madrid Seismic Network

Type: Earthquake
62 minutes ago
Magnitude: 3.6
DateTime: Thursday September 22 2011, 23:32:09 UTC
Region: southeastern Missouri
Depth: 16.5 km

quakes.globalincidentmap.com...

Event ID nm092211b

double post for some odd reason

reply to post by SpaceJockey1


No not following. The 6.8 and the 6.2 are the same quake. The 6.8 has been deleted but sites like RSOE and Global Incident often take a while to catch up, or never catch up at all.

EMSC have it as a 6.5 Mw. There will be some adjustment here after the 7 days has passed and it will go up to a 6.4 probably.

reply to post by dreamfox1

Year,Month,Day,Time(hhmmss.mm)UTC,Latitude,Longitude,Magnitude,Depth,Catalog
1974,08,11,142945 , 36.918, -91.173,3.6, 4,PDE
1975,08,25,004414.50, 37.230, -90.890,2.7, 5,PDE
1975,08,25,030128.40, 37.230, -90.880,2.8, 5,PDE
1979,11,05,163526 , 36.440, -91.010,3.2, 8,PDE
1992,04,30,000130.90, 36.920, -90.410,3.6, 5,PDE
1997,09,20,055550.43, 37.179, -90.924,3.1, 5,PDE
1998,10,26,002952 , 37.000, -90.880,2.6, 5,PDE
1999,10,21,0818 , 36.490, -91.020,3.9, 19,PDE
1999,10,21,084948.49, 36.511, -91.050,3.1, 11,PDE
2000,08,22,201214 , 36.492, -91.106,3.9, 8,PDE
2000,10,01,111356 , 36.772, -90.761,2.5, 4,PDE
2004,02,09,182149 , 36.350, -90.750,2.9, 12,PDE
2004,09,13,043131 , 36.420, -90.920,2.5, 1,PDE
2007,11,23,092306 , 36.770, -90.810,2.8, 10,PDE
2008,03,31,104439 , 36.980, -90.410,2.8, 6,PDE
2009,07,31,101313 , 36.565, -90.592,2.5, 19,PDE
2009,10,26,114322 , 36.420, -90.930,2.7, 16,PDE

Source

For info.

reply to post by PuterMan


Okay, had a feeling that might be the case.

Thanks for that PuterMan.

The depth of both the Mo. and Tonga quake is 8.6 km........

Originally posted by radpetey
The depth of both the Mo. and Tonga quake is 8.6 km........

No worries- that's just a random coincidence of synchronicity.

Originally posted by PuterMan
reply to post by SpaceJockey1

 

No not following. The 6.8 and the 6.2 are the same quake. The 6.8 has been deleted but sites like RSOE and Global Incident often take a while to catch up, or never catch up at all.

EMSC have it as a 6.5 Mw. There will be some adjustment here after the 7 days has passed and it will go up to a 6.4 probably.

edit on 22/9/2011 by PuterMan because: (no reason given)

I'm getting to like this site for getting some background, far better than RSOE or Global Incident sites, at least they try to keep updating info as it comes in and gives eyewitness reports if they can get them.
page on the Tonga quake today, near a volcanic island apparently
EQReport

Who'd want to be a disaster insurer?

September 23, 2011 – LONDON – The Lloyd’s of London insurance market said Wednesday that it dived into first-half losses due to an unprecedented number of major natural catastrophes including the Japanese earthquake and tsunami.

The company made a pre-tax loss of £697 million ($1.09 billion, 800 million euros) in the six months to the end of June, Lloyd’s said in a results statement, as it was hit by soaring claims. That compared with a profit of £628 million in the same period of the previous financial year.

“2011 has already been one of the most challenging years on record for the insurance industry with major natural catastrophes devastating communities in Australia, New Zealand, Japan and the United States,” said Chairman Lord Levene.

“Lloyd’s ability to pay billions in claims to help these communities rebuild is unquestioned and the fact that we have managed to do so without any call on our central capital reserves is testament to the market’s exposure management.”

The group added that insurance claims so far this year have already exceeded those for the whole of 2010, after Japan’s devastating March 11 earthquake and tsunami which sparked a nuclear crisis.

“To put the figures into perspective, the claims seen so far in 2011 arising from major events have already exceeded the total for 2010 and we have not yet reached the end of the Atlantic hurricane season,” added Levene.

“Two of the 10 costliest natural disasters since 1950 — the earthquakes in Japan and New Zealand — have occurred this year.”

SOURCE

Originally posted by SpaceJockey1
Who'd want to be a disaster insurer?

“Lloyd’s ability to pay billions in claims to help these communities rebuild is unquestioned and the fact that we have managed to do so without any call on our central capital reserves is testament to the market’s exposure management.”

SOURCE

I'm glad to hear this as Lloyds were the only company willing to insure me for personal accident this year, and reading their prospectus was quite impressive they specialize in some pretty high risk stuff.

reply to post by muzzy

"I'm getting to like this site for getting some background, far better than RSOE or Global Incident sites, at least they try to keep updating info as it comes in and gives eyewitness reports if they can get them.
page on the Tonga quake today, near a volcanic island apparently "
EQReport

Glad you're finding the site useful muzzy! But even 'gladerer' that you are all better now.
Rainbows
Jane

reply to post by muzzy


Well it made it to 6.4 as I predicted, but I must say I thought it would take longer than that.

Yes earthquake report is good and they do update as you say, and they get some very detailed information. Definitely on of the best around.

reply to post by PuterMan


Yeah I LOL'ed when I saw it revised to a 6.4!! Way to go my friend!!!

I too like earthquakereport.com but they are usually slower than I would like....even thought about gathering information for them ....but....then I awoke from that nightmare. Having three kids and a man around that is like having 4 kids, there simply isn't enough time. I would have to take time away from Quake Watch on ATS and ....no can do.

xoxoxox

Jenn

over night....

2.5 mag.
Date-Time

Friday, September 23, 2011 at 04:21:20 UTC
Thursday, September 22, 2011 at 11:21:20 PM at epicenter
Time of Earthquake in other Time Zones

Location 32.422°N, 96.796°W
Depth 5 km (3.1 miles)
Region NORTHERN TEXAS
Distances 5 km (3 miles) NE of Waxahachie, Texas
40 km (24 miles) S of Dallas, Texas
47 km (29 miles) NW of Corsicana, Texas
255 km (158 miles) NNE of AUSTIN, Texas
Location Uncertainty horizontal +/- 17.8 km (11.1 miles); depth +/- 3.1 km (1.9 miles)
Parameters NST= 15, Nph= 17, Dmin=79 km, Rmss=1.09 sec, Gp=122°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source

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

Event ID usc0005zfr

Not very big, but seems odd for this area. I dont see too many in Texas, a little too close for comfort.. I live 100 miles east of there..

reply to post by lyons666


Yeah the Middle US is seeing activity and I really hope it remains small and does not set off the New Madrid. I am keeping my eye on the EQ's ...that is for sure.

My daddy lives in Avinger, TX. on Lake O The Pines......he said a wildfire came about ten miles from his home. So glad he is ok.

reply to post by MamaJ


Slow is good. It is usually more accurate. I don't usually start adding a quake to my site for several hour because they so often change. Rushing to add a quake and then failing to update is more of a problem as far as I am concerned than having to wait to get the correct details.

I might put them on the front list, but the post page waits until I think it has settled for the time being otherwise I am having to create so many images and upload/delete etc. Just too much time.

Here is my blog page for Tonga

I have decided to drop doing the packages of images and PDF since very rarely do they get downloaded and basically they are available on the blog page anyway. Just a right click away. As usual I am happy to make a PDF of the page if someone wants. I shal not stop creating the blog pages as I believe it is important to have a record especially since many of these you cannot get after 30 days.

I am probably going to add Tensor Moment data to the page as I have on this one.