Earthquakes

[Turtle]

___St. Helens continues to produce a 3.0 or better about every day & 1/2 now. Shake, rattle, & roll. I see we have a litlle shock/aftershock sequence in the New Madrid fault area this past day too:

http://earthquake.usgs.gov/recenteqsUS/Maps/US10/32.42.-95.-85.html

[Turtle]

___I spotted this piece on funding research into the newly discovered "slow" or "silent" quakes:

http://www.stuff.co.nz/stuff/0,2106,3404435a10,00.html

___ :hihi:

[Turtle]

___A new slow quake has started September 6th in Cascadia.

http://www.pnsn.org/NEWS/PRESS_RELEASES/TREMOR_05.html

___Exciting geology rocks! :hihi:

[Turtle]

___I only just found & started reading this document on a 9.0 earthquake scenario in Cascadia; this is about as good as it gets for prediction these days unless you follow the Moon Tide guy.

http://www.crew.org/papers/CREWCascadiaFinal.pdf

:eek2:

[Turtle]

___Just perusing the world seismograms & of course I like to always see what's shaking in my immediate neghiborhood. In so doing, I noticed this rather unusual activity from the Mt. Adams station. While some of the signal is due to wind, the abrupt signals correlate to quakes in the < 1.0 range. It is also interesting that neighboring St. Helens has no congruent signals, but rather is just chuffing along with the usual dome-building traces & wind signals.

___Anyway, this is an interesting change in Mt. Adams usual signals.

http://www.pnsn.org/WEBICORDER/VOLC/ASR_SHZ_UW.2005122012.html

 

 

 

 

:cup:

[Chacmool]

I have over the last year developed/aquired the ability to feel earthquakes; it is called the Charoltte King Effect. As I live just 51 miles from Mt. St. helens, lateley I find all the shaking very disconcerting.

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 by volcanic activity, or by all seismic activity?

[Turtle]

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 by volcanic activity, or by all seismic activity?

 

___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 seiesmogram without leaving a trace. As far as I have determined by checking the seismograms, I feel the events as they happen, & whether the shaking originates from the volcano(s) or not is inconsequential to feeling quakes.

___I have spent a couple years now checking dozens of real-time seismograms on a daily basis, both local & worldwide. What I see is that some events have strong association with other distant events in regard to the time of occurence & the shape of the event signal.

___A new study is just out which may shed light on the formation of the Wallowa mountains in NE Oregon as well as the highly unusal Columbia Basalt lava flows. Seems the Yellowstone hot spot may have played a roll in melting the deeper basalt & allowing the granitic Wallowas to float up in what is a geologically fast rise of a mountain range. This is particularly interesting because the Wallowas aren't near a plate boundary, which is the normal location & ultimate cause of raising many mountain ranges.

___Thanks for your inquiry Chacmool; always nice to hear from you.:eek2:

[TheBigDog]

Here is something on earthquakes that I found fascinating. They use radar from a satallite to measure deformation of the earths surface. Reports I have seen on this indicate that you can see bulges forming that are like a coiled spring. The use has not been long enough to be conclusive, but it is very interesting.

 

http://news.nationalgeographic.com/news/2004/07/0720_040720_earthquake.html

 

Bill

[Turtle]

Here is something on earthquakes that I found fascinating. They use radar from a satallite to measure deformation of the earths surface. Reports I have seen on this indicate that you can see bulges forming that are like a coiled spring. The use has not been long enough to be conclusive, but it is very interesting.

 

http://news.nationalgeographic.com/news/2004/07/0720_040720_earthquake.html

 

Bill

 

___Thanks Bill for the link. The article briefly mentions GPS which is the main contributing factor in the new discovery of slow/silent quakes I mentioned earlier in this thread. As the technique gains recognition I expect the phenomenon will show up in other regions besides here in the Pacific Northwest of the US.

___Another growing bulge is found in the Three Sisters area of the Cascades too. The "coiled spring" idea is part & parcel of the great quake understanding along subduction zones as we saw in the 9.0 that generated the tsunami last year off Sumatra, as well as the now identified great quake activity on the Cascadia Subduction zone in my area.

___On average over the last 11,000 years, Cascadia has generated a great quake about every 500 years, with the last occuring approx. 300 years ago.

:)

[Turtle]

___We just had a 7.4 in Mozambique, as well as aftershocks, making for a shock/aftershock sequence.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/usjlca.php

http://earthquake.usgs.gov/eqcenter/recenteqsww/Maps/region/Africa.php

___Wondering too if Boerseun or Chacmool felt this in South Africa?:)

[Chacmool]

___We just had a 7.4 in Mozambique, as well as aftershocks, making for a shock/aftershock sequence.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/usjlca.php

http://earthquake.usgs.gov/eqcenter/recenteqsww/Maps/region/Africa.php

___Wondering too if Boerseun or Chacmool felt this in South Africa?:)

Thanks for thinking of us, dear Turtle! :) Although there were reports of the quake being felt in Johannesburg, I didn't feel a thing. Apparently our former president, Nelson Mandela, was in Mozambique with his wife (it's her home country), but he slept soundly through the entire earthquake while people in South Africa were fearing for his safety!

 

We do feel the occasional light quake in Johannesburg, but it has nothing to do with the Great Rift; it is usually caused by mining activity in the area.

[Boerseun]

___We just had a 7.4 in Mozambique, as well as aftershocks, making for a shock/aftershock sequence.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/usjlca.php

http://earthquake.usgs.gov/eqcenter/recenteqsww/Maps/region/Africa.php

___Wondering too if Boerseun or Chacmool felt this in South Africa?:)

Nope. Not a thing. Although I heard on a talk radio station here people from Gauteng Province (Jo'burg and Pretoria) experienced cupboards etc. rattling. It was like 12:00-1:00 am somewhere - I slept soundly through it all.

 

Apparently the Durban waterfront was frantically evacuated by the emergency services, because they feared a tsunami after the initial shakes.

 

As far as I know, a few people (literally, one or two) died in Mozambique after a single building collapsed. And that's about it!

[Boerseun]

Haha - they spoke to a guy now who woke up during the earthquake, he said he felt it but didn't worry about it, seeing as he was drunk and the earth moving was a totally normal effect under the circumstances. He didn't notice anything untoward! :)

[Chacmool]

Haha - they spoke to a guy now who woke up during the earthquake, he said he felt it but didn't worry about it, seeing as he was drunk and the earth moving was a totally normal effect under the circumstances. He didn't notice anything untoward! :)

Now that you mention it, I'm predicting a major earthquake in my immediate vicinity tomorrow morning. :)

[Turtle]

Thanks for thinking of us, dear Turtle! :eek:

 

___My pleasure; thank you for saying so. Now I have similar concerns/interest about our friends Gahd & Killean over in Canada as they just had a quake near them. Did you fellas feel it?

___It is an infrequent location and more strange in the predictive aspect Tormod started the thread with, I found a report of an unexplained "booming" event the day before the quake in Maine. Possibly connected?:lol:

Somerset County boom a mystery

http://morningsentinel.mainetoday.com/news/local/2467965.shtml

___The quake maps & associated readings for the Canada quake:

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

http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/US2/45.47.-76.-74.php

If you feel a quake, they have a section to report it; they use this data to correlate & further measure the amplitude & effects of quakes.

___This map is the US; besides the Canada quake, my state of Washington is quite active this week, & Yellowstone has some minor activity as well.

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

:)

 

PS I found a nearby seismogram archived & have the link below. I see no apparent signal at the 10:00AM time of reports to police, but the signal at midnight is rather unusual.

http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl?id=&year=2006&jday=54

[Turtle]

___Busy week of "unusual" quakes. Just business as usual filling out the edges of the bell. To whit, just an hour or so ago a 3.2 under Yellowstone. (I had a 3.0 under St. Helens) First link is to the report, the second is to the regional real-time seismograms. Some stations show some activity preceding the quake, others the quake appears as the only 'hiccup' in an otherwise rather featureless trace.

 

http://earthquake.usgs.gov/eqcenter/recenteqsus/Quakes/uu00007613.php

http://www.seis.utah.edu/helicorder/heli/yellowstone/index.html

[Turtle]

___Busy week of "unusual" quakes....

 

___Maybe a better term than 'unuusal' is 'infrequent'. :eek: :eek: Anyway, the infrequent quake locations & frequencies is still up, with a 3.1 today just 25 miles from Cleveland Ohio ( ), activity on the New Madrid fault system, activity in Yellowstone, activity under St. Helens, & activity off the Oregon coast. (Oh yeah...Utah's a rockin lately too.:) )

___As we approach the Full Moon, look for increased activity these next few days. :) ;) ;)