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Tormod

By Tormod
in Earth and Climate Science

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Turtle Newbie

Turtle

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Just another normal earthquake day for which nobody predicted a 3.0 in Oklahoma, let alone mention it on the TV/radio news. Infrequent; that's the ticket.

As far as prediction goes, I think there is a lot of reluctance to make any because of the economic/political repercussions of a wrong one.

Did any of you hear this quake reported, or better yet feel it?

;)

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Tormod
Tormod

lefthttp://hypography.com/bilder/earthquakes_2.gif[/img] I wrote up a hypography on earthquakes a while back and figured it was time to update it.   The biggest problem with earthquakes - apart from

Chacmool
Chacmool

Fascinating, Turtle! I haven't heard about this phenomenon before. Does Mt. St. Helens in particular affect you in any physical way? Can you make accurate earthquake predictions? Are you only affected

Turtle
Turtle

___The particular way St. Helens affects me is that my attention is kept on it because of the constant shaking. I don't attribute any predictive character to this; more or less I'm like a human seiesm

Turtle Newbie

Turtle

Posted
Posted
we very *very* rarely get quakes down under - I guess not have a fault line anywhere inland helps! but we do get the occasional tremor. I remeber a few years back we had one that was actually strong enough that I felt it while driving in the car!

As it turns out, Austrailia has quite a bit of historiacl quake activity; we may a link earlier in this thread.

Add> http://www.quakes.uq.edu.au/gen_info/lge_quakes/list_aust.html

Nonetheles, while mostquakes occur on or near plate boundries (did you mean plate boundries, not fault lines?), large quakes can & do occur far from them. Moreover, many faults remain unmapped the world over.

Today in the US we had a 3.3 in Tennesee, which is infrequent, but dangerously near the New Madrid fault system that produced 8.0+ quake in the early 1800's.

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/sehwb0411a.php

I have started keeping an informal record from the USGS site I continually reference. Each day I visit, I note the time & the amount noted behind "Number of Quakes on this Map" for both the World Map & the US map. The US map total is higher because they include smaller quakes. So far the High World is 227/Low World 151|High US 610/Low US 501.

:xx:

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Turtle Newbie

Turtle

Posted
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I have started keeping an informal record from the USGS site I continually reference. Each day I visit, I note the time & the amount noted behind "Number of Quakes on this Map" for both the World Map & the US map. The US map total is higher because they include smaller quakes. So far the High World is 227/Low World 151|High US 610/Low US 501.

:)

After 3 months of keeping the record, today is the all time low for quakes in the World at 143 quakes. The US map includes quakes >=1.0, while the World map includes quakes >=2.5.

I only take the data once a day, & then at no specific interval; I don't know how often the maps update.

http://earthquake.usgs.gov/eqcenter/recenteqsww/

:)

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Turtle Newbie

Turtle

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Wouldn't today be the "3 month low" then? :hihi:

 

 

:shrug:

 

Yes of course. As I specified the 3 months as the time I personally have kept the records, then 'all time' refers to my personal record low.:hihi: I don't know if USGS archives this data in the format I have used for my informal analysis. I have toyed with the idea of learning to use the spreadsheet on this machine; I love toying.:doh:

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Turtle Newbie

Turtle

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You rock, dude! :)

 

Just a couple of things. I found this machine has Quattro, I entered 43 data points in a single column, but when I tried to make a bar graph of it I froze the machine so bad I had to unplug it.:rant: :hihi: :confused:

The other is an 'infrequent' quake in Ohio & a 2.8 at that. Wondering if any of our Ohio memebers felt the temblor last night just before 11 PM?

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/usmqaf.php

:cup:

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Turtle Newbie

Turtle

Posted
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After 3 months of keeping the record, today is the all time low for quakes in the World at 143 quakes. The US map includes quakes >=1.0, while the World map includes quakes >=2.5.

I only take the data once a day, & then at no specific interval; I don't know how often the maps update.

;)

 

I still can't for the life of me figure out how to graph these data points in Quattro! (hint, hint;) ) Today however, in 3 months of keeping the record, today set an all time high of 705 >=1.0 earthqaukes in the US (includes Hawaii & Alaska). The previous high mark occured May 17, with 639 >=1.0 quakes.

http://earthquake.usgs.gov/eqcenter/recenteqsus/

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Turtle Newbie

Turtle

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A new article coming out indicates the study of 'slow' or otherwise called 'silent' quakes may have predictive ability in regard to the regular type of quake scientists have grown used to. I have discussed these slow quakes elsewhere in this thread & provide some background links there as well.

Here is a quote & a link to the full report:

 

 

Predicting earthquakes has proven notoriously difficult. In the new study, the scientists describe four silent, or "aseismic," earthquakes detected around Kilauea volcano on Hawaii's Big Island between 1998 and 2005.

 

What made the Kilauea event special was that it was accompanied by about 60 conventional earthquakes of magnitudes 2 and 3 spread out over two days. That's about six times higher than the area's background rate of earthquake activity.

 

Data from global positioning satellites revealed that the micro-tremors were preceded by a silent, magnitude 5.7 quake that lasted for 48 hours.

 

The researchers think the silent tremor triggered the swarm of minor quakes. The minor quakes in turn might be adding stress to the fault zone, increasing the chances of a mega-earthquake of magnitude-8 or larger occurring.

Read more here:

http://www.livescience.com/forcesofnature/060705_silent_quakes.html

:)

PS Check out these other Hypography threads on predictive techniques for earthquakes:

http://hypography.com/forums/earth-science/4120-earthquake-precursors.html

http://hypography.com/forums/physics-mathematics/605-piezoelectric-earth.html

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Turtle Newbie

Turtle

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I have noticed lately a regular cycle of seismic activity at the Cedar Flats seismometer which starts up around 10 am & ends around 6 pm. At first it mystified me, but now I think I have the answer. This seismic activity is likely due to thermal solar heating which lags a few hours behind Sunrise.

I have made up a composite trace for a full day & put it in the Science Gallery; the ORANGE bars along the sides I added to delineate the activity.

http://hypography.com/gallery/showimage.php?i=972&c=3

Here is the station location as well as links to the seismograms I refer to.

 

CDF 46 07 01.40 122 02 42.10 0.756 3/80 % UW Cedar Flats

http://www.pnsn.org/WEBICORDER/VOLC/CDF_SHZ_UW.2006071000.html

http://www.pnsn.org/WEBICORDER/VOLC/CDF_SHZ_UW.2006070912.html

:eek2:
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Turtle Newbie

Turtle

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I still can't for the life of me figure out how to graph these data points in Quattro! (hint, hint;) ) Today however, in 3 months of keeping the record, today set an all time high of 705 >=1.0 earthqaukes in the US (includes Hawaii & Alaska). The previous high mark occured May 17, with 639 >=1.0 quakes.

http://earthquake.usgs.gov/eqcenter/recenteqsus/

 

A new high count today in the US at 722 quakes >=1.0. I have started putting my list in a text file & I have it below in a code box. As I make additions I will edit them in & keep the list up to date. I left out time of day, but in general I have recorded one data point for 10:00 am PDT +- 1 hour.

 

Date_____World_US
5/29/2006|199|547
5/30/2006|209|541
5/31/2006|187|534
6/01/2006|201|566
6/02/2006|214|611
6/03/2006|205|606**1st Quarter Moon
6/04/2006|182|572
6/05/2006|174|564
6/06/2006|170|599
6/07/2006|176|590
6/08/2006|177|581
6/09/2006|181|609
6/10/2006|176|567
6/11/2006|165|542**Full Moon
6/12/2006|152|527
6/13/2006|142|549
6/14/2006|216|655
6/15/2006|241|705
6/16/2006|269|713
6/17/2006|277|711
6/18/2006|294|715**3rd Quarter Moon
6/19/2006|294|708
6/20/2006|[color="Red"]312[/color]|746
6/21/2006|262|682
6/22/2006|226|647
6/23/2006|210|632
6/24/2006|197|596
6/25/2006|186|557**New Moon
6/26/2006|164|510
6/27/2006|173|514
6/28/2006|180|514
6/29/2006|186|517
6/30/2006|173|552
7/01/2006|166|559
7/02/2006|195|609
7/03/2006|235|661**1st Quarter Moon
7/04/2006|225|682
7/05/2006|207|683
7/06/2006|213|717
7/07/2006|221|670
7/08/2006|232|655
7/09/2006|247|662
7/10/2006|235|666
7/11/2006|248|678**Full Moon
7/12/2006|254|705
7/13/2006|262|722
7/14/2006|256|[color="red"]762[/color]
7/15/2006|251|754
7/16/2006|181|654
7/17/2006|167|631**3rd Quarter Moon
7/18/2006|162|579
7/19/2006|206|577
7/20/2006|210|570
7/21/2006|215|559
7/22/2006|214|555
7/23/2006|198|533
7/24/2006|179|504
7/25/2006|177|509**New Moon
7/26/2006|178|529
7/27/2006|164|544
7/28/2006|175|566
7/29/2006|171|545
7/30/2006|177|537
7/31/2006|165|526
8/01/2006|169|559

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Turtle Newbie

Turtle

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A new high count today in the US at 722 quakes >=1.0. I have started putting my list in a text file & I have it below in a code box. As I make additions I will edit them in & keep the list up to date. I left out time of day, but in general I have recorded one data point for 10:00 am PDT +- 1 hour.

 

Date_____World_US
5/29/2006|199|547
5/30/2006|209|541
5/31/2006|187|534
6/01/2006|201|566
6/02/2006|214|611
6/03/2006|205|606**1st Quarter Moon
6/04/2006|182|572
6/05/2006|174|564
6/06/2006|170|599
6/07/2006|176|590
6/08/2006|177|581
6/09/2006|181|609
6/10/2006|176|567
6/11/2006|165|542**Full Moon
6/12/2006|152|527
6/13/2006|142|549
6/14/2006|216|655
6/15/2006|241|705
6/16/2006|269|713
6/17/2006|277|711
6/18/2006|294|715**3rd Quarter Moon
6/19/2006|294|708
6/20/2006|[color="Red"]312[/color]|746
6/21/2006|262|682
6/22/2006|226|647
6/23/2006|210|632
6/24/2006|197|596
6/25/2006|186|557**New Moon
6/26/2006|164|510
6/27/2006|173|514
6/28/2006|180|514
6/29/2006|186|517
6/30/2006|173|552
7/01/2006|166|559
7/02/2006|195|609
7/03/2006|235|661**1st Quarter Moon
7/04/2006|225|682
7/05/2006|207|683
7/06/2006|213|717
7/07/2006|221|670
7/08/2006|232|655
7/09/2006|247|662
7/10/2006|235|666
7/11/2006|248|678**Full Moon
7/12/2006|254|705
7/13/2006|262|722
7/14/2006|256|[color="red"]762[/color]
7/15/2006|251|754
7/16/2006|181|654
7/17/2006|167|631**3rd Quarter Moon
7/18/2006|162|579
7/19/2006|206|577
7/20/2006|210|570
7/21/2006|215|559
7/22/2006|214|555
7/23/2006|198|533
7/24/2006|179|504
7/25/2006|177|509**New Moon
7/26/2006|178|529
7/27/2006|164|544
7/28/2006|175|566
7/29/2006|171|545
7/30/2006|177|537
7/31/2006|165|526
8/01/2006|169|559
8/02/2006|179|574**First Quarter Moon

 

I have updated the list to todays date, added the Moon phases, and red highlighted the maximum values observed.

I appeal to you all for help in graphing this data set in a spreadsheet! I just want a simple bar graph but try as I might I cannot figure out how to do this in the Quattro spreadsheet this machine came with. Won't you...help a turtle like me?:hihi: If an emotional appeal is ineffective, I can offer bribes.:eek2:

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Turtle Newbie

Turtle

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OK, here's the fresh data. This was NOT under St. Helens this time; it was just outside Vancouver city limits and SW of St. Helens. Wow! Thisa one was a corker!

3.3 Thursday, August 3, 2006 at 1:39:18 AM = local time at epicenter

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/uw08030839.php

Cedar Flats Seismogram trace; 40 miles from me:

http://www.pnsn.org/WEBICORDER/VOLC/CDF_SHZ_UW.2006080300.html

:turtle::

:cup:
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Turtle Newbie

Turtle

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OK, here's the fresh data. This was NOT under St. Helens this time; it was just outside Vancouver city limits and SW of St. Helens. Wow! Thisa one was a corker!

3.3 Thursday, August 3, 2006 at 1:39:18 AM = local time at epicenter

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/uw08030839.php

Cedar Flats Seismogram trace; 40 miles from me:

http://www.pnsn.org/WEBICORDER/VOLC/CDF_SHZ_UW.2006080300.html

We have quite the shock/aftershock series building here! Quake depth just over 7 miles. I won't get much sleep tonight....er...this morning. It's almost 4 am here.

 

Map:

http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/US2/45.47.-124.-122.php

 

Seismogram:

http://www.pnsn.org/WEBICORDER/VOLC/CDF_SHZ_UW.2006080300.html

 

Quake Stats:

2.6 Thursday, August 3, 2006 at 3:21:25 AM = local time at epicenter

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/uw08031021.php

2.1 Thursday, August 3, 2006 at 3:25:25 AM = local time at epicenter

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/uw08031025.php

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