Quake Watch 2011

reply to post by MountainEnigma


OK well, never mind.

Look on the bright side. We are all still here so it could not have been anything too serious!

reply to post by westcoast


Also showing on the EHZ channel yesterday. HOG.UW..EHZ.2011.155

Did we not just have some solar activity? Oh yes. Just about matches (see the 2 Hz line above the bottom activity.

reply to post by Aromaz


A bit early in the day to see the big picture for the 5th and 6th but the last 4 days have been pretty quiet here in New Zealand for earthquakes
June 1 - 8
June 2 - 12
June 3 - 9
June 4 - 5

May be picking up though, 17 for the 5th June so far and 4 hours to go.
It would have to pass 25 to be abnormal.

Its a Long Holiday Weekend here, always hard to tell if its because no one is checking the siesmos at GNS or there is in fact a drop off of quakes.
They are working on speeding up Automatic retreival of data, using Geofons programme
www.geonet.org.nz...

reply to post by muzzy

05.06.2011 14:20:25 5.7 Australia & New-Zealand Australia
U jinxed it.

25 a derivative of 250 right?

Just thinking, out loud,, hmmmmmm,,, doe,,ray,, me,,

lol

Me.

Reasonable aftershock here in Christchurch about ten minutes ago...went on for about ten seconds; the longest duration we've had in a while. Heard the rumble and it kept on going.
Mother-in-Law is in Fairlie and they felt it there. She said the radio said it went for 22 seconds....the time dilation must be due to the painkillers for my back!



edit: A 5.5 20km SW of Christchurch. Near Rolleston,at a depth of c15 k. 9:09 a.m.

Chch quake Crowe

Geonet

Also noted 3.8 near Murchison @ c. 10 km depth at 7:58 a.m. Alpine Fault by the looks.

reply to post by aorAki


Yep that sure got us out of bed.. and almost under it!!! Had the S-wave action big time... and what felt like slight rotation, which was also reported by a friend over the Alps in Greymouth..

Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
2011-06-05 21:09:55, -43.569, 172.390, 5.0, 3.8, S. Isl Of Nz, USGS
2011-06-05 21:09:55, -43.605, 172.412, 5.5, 15.8, Rolleston, GeoNet

EMSC also have it as a 5.0



[atsimg]http://files.abovetopsecret.com/images/member/4d0b559e5259.png[/atsimg]

Not bad actually, only 2.67 miles difference in location

Just saw this in my twitter feed.

A significant aftershock rattled Christchurch this morning but it appears the city has escaped any substantial fresh damage. The magnitude 5.5 quake had a focal depth of 15km and was centred 20km southwest of Christchurch, near Rolleston.

Hope everyone is ok

source

Now we are getting on towards half way through 2011 I thought it was time, and found time, to compare the reviewed earthquakes for 2010 in the ANSS catalogue with the listing that I have from downloading the USGS, EMSC and other files daily. This is for Magnitude 6.0+ quakes.

I have said before that I am aware that there are differences as quakes get revised sometimes long after the event. On the small image below (because there is a link to a larger one below it) you will see what I will call red lines which is where there is a magnitude difference between ANSS (on the left) and what is on the blog (on the right) for the 2010 list which is basically using the USGS 7 day text files and EMSC KMZ files for sources.

Many of these magnitudes have been revised upwards. The green lines are where a quake has been upgraded or added to ANSS that did not come through within 7 days on the listings. The mauve/purple/whatever colour is where one is not in ANSS but was not changed in the list in other words this probably means that it was downgraded to below Mag 6 after the 7 days had passed. They almost certainly will be in ANSS but at a lower magnitude.

You may be surprised to learn, or even very surprised to learn, that the ANSS version has 31.5 magnitude points more than the blog version if I exclude the NZ quake. (Which will now be updated!) There are 173 quakes in ANSS against 169 on the blog.

[atsimg]http://files.abovetopsecret.com/images/member/9099c2d470ef.png[/atsimg]

What is going on HERE ??

Any thoughts about this? It does not look like consistent quake, but is this rumbling or agitation of a fault?

This is from the USGS site at Millersville, PA.

This is an odd one. Not normal to see a quake here... at least I think it's not.

Earthquake Details

This event has been reviewed by a seismologist.
Magnitude 3.0
Date-Time Sunday, June 05, 2011 at 15:35:20 UTC
Sunday, June 05, 2011 at 11:35:20 AM at epicenter
Time of Earthquake in other Time Zones

Location 41.020°N, 82.090°W
Depth 5 km (3.1 miles) set by location program
Region OHIO
Distances 23 km (14 miles) SW of Medina, Ohio
27 km (16 miles) NNW of Wooster, Ohio
63 km (39 miles) SSW of Cleveland, Ohio
141 km (87 miles) NNE of COLUMBUS, Ohio

Location Uncertainty Error estimate not available
Parameters NST= 8, Nph= 8, Dmin=115.7 km, Rmss=0 sec, Gp= 72°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source OhioSeis Network, Ohio Geological Survey, Columbus, USA


Event ID us2011lube

USGS

reply to post by BobAthome


It just happens often enough its worth mentioning when I do see it deteriorate to low numbers like that.

A 5+ quake doesn't happen every time the numbers drop, so you can't go around like the robot in the Lost in Space TV show going "danger danger Will Robinson"

The 5 could have been anywhere in NZ for that matter.

reply to post by UtahRosebud


Yup fairly unusual. Last 365 days for Ohio.

Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
2011-06-05 15:35:20, 41.020, -82.090, 3.0, 5.0, Ohio
2011-03-17 10:53:09, 41.110, -80.680, 2.6, 5.0, Youngstown-Akron Urban Area. Ohio
2010-10-24 08:12:44, 39.432, -81.361, 2.8, 5.0, Ohio
2010-06-10 16:32:22, 41.760, -81.430, 2.5, 5.0, Lake Erie. Ohio

reply to post by MountainEnigma


No it is called Students! The seismo is at Miller University.

Well it might not actually be students but basically most of the noise on this instrument is cultural. If you go back through several days you will find that the noise is strongest between 0200 UTC to 1000 UTC so not sure how far behind UTC they are there but I am guessing that it is quietest between 2200hrs and 0600hrs local time which sort of makes sense.

Now if you wanted to find one to get worried about you should have gone back to the 26th May. MVL.LD..HHN.2011.146 (This is only good for about 4 more days max)

If you said WTF about that one I would understand, however the big scary ones are not earthquakes! You can 'listen' to them here:
LD_MVL _HHZ_20110526-Snippet_1000Hz_LP5.mp3

I picked 4 stations to get a comparison, but unfortunately there was no easily recognisable similarity between the signals. (This was 11:10 UTC to 12:00 UTC on 26 May



The spectrum of the noise looks like this (HHZ channel @ 100Hz): This does not look like a seismic signature an is showing bands of frequencies in the background. I can see any obvious Solar Wind implications here but maybe someone else would like to look at Gakona and see what they think.



Here is the frequency analysis of this signal.


On one of the other stations (a BHZ channel @ 40Hz) the spectrum look like this. You can just make out the noise:


Listening to that I can just hear it, but if I do a low pass filter at 5 Hz to remove cultural noise as much as possible there is virtually no sound at all even at 40 x speed. Pure (almost) silence!

Conclusions? Probably Solar, definitely not seismic.

reply to post by muzzy


"you can't go around like the robot in the Lost in Space TV show going "danger danger Will Robinson"

ok,,how about a "Spock" ,,,, "facinating",,,,with raised eyebrow,

reply to post by PuterMan


Thanks I had stated that I didn't think they were earthquakes, but was concerned about the constant agitation. I have read in another thread (sorry, don't have link), that there could be something called fracturing of the lithosphere. And some people believe something about the earth expanding, which I'm sure would cause an increase in earthquakes as well as from fracturing of the crust and other layers.

That is not the first time I have seen something like that on Millersville, PA, and with the concern of a fault in NYC and many faults along the East coast, I was just wondering if what was going on could be agitation. You are saying you believe it to be solar related? So that would mean that the solar radiation does potentially have some bearing on earthquakes? Or at least on seismic activity at some level?

reply to post by BobAthome


yeah thats about the reaction.

You know I never been able to find a decent "raised eyebrow" emoticon on the web.

Would get a lot of use on here

Originally posted by muzzy
reply to post by BobAthome

 

yeah thats about the reaction.

You know I never been able to find a decent "raised eyebrow" emoticon on the web.

Would get a lot of use on here

edit on 6-6-2011 by muzzy because: (no reason given)

I use this,generally: 0.o

Those poor folk in Rolleston were 'peppered' yesterday!

reply to post by UtahRosebud


A while back, there was another one about 14 miles from Youngstown that was less than a 3.0. It was strange also, and not too far from this 3.0 you have posted.

What is odd is that the 2 earthquakes are not far from Reed's fault line prediction of a split in the US from the Gulf of Mexico to Ontario through the middle of Ohio.

Magnitude 4.2 - MISSOURI

* This event has been reviewed by a seismologist.

Magnitude 4.2
Date-Time

* Tuesday, June 07, 2011 at 08:10:34 UTC
* Tuesday, June 07, 2011 at 03:10:34 AM at epicenter

Location 38.121°N, 90.933°W
Depth 5.1 km (3.2 miles)
Region MISSOURI
Distances

* 18 km (11 miles) SE (137°) from Miramiguoa Park, MO
* 23 km (14 miles) ESE (116°) from Sullivan, MO
* 24 km (15 miles) NNW (327°) from Potosi, MO
* 82 km (51 miles) SW (227°) from St. Louis, MO

Location Uncertainty horizontal +/- 10.7 km (6.6 miles); depth +/- 3 km (1.9 miles)
Parameters NST=160, Nph=187, Dmin=83.5 km, Rmss=1.49 sec, Gp= 18°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=A
Source

* U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver

Event ID usc00041ic