PSN-L Message - Subject: Re: Digest from 08/06/2007 00:01:22

OBSERVATION ONLY; Not a crticism. Capabilities and Limitations of any amateur. It seems unlikely to me that an amatur has the abilities to build scientific equipment with the abilities to properly recreate the actual ground motion. There are phase relationships involved that are\very difficult to properly record after passing through complex filter circuits. The best we can hope to achieve are things like first time of arrival and relative energy content. But the faithful recreation of ground motion seems almost impossible to me based upon personal experiences. Heck, Im just happy to be able to know this wave is passing under and through me right about now. Regards; geoff gva ----- Original Message ----- From: "Randy" To: Sent: Tuesday, August 07, 2007 3:47 PM Subject: Re: Digest from 08/06/2007 00:01:22 > Hi All, > > Concerning the mine collapse, would not a collapse give the same initial > direction of motion in all directions from the event whereas a quake would > create opposite motion on either side of rupture? I have something on my NS > horizontal near the time that seems to build more slowly than a typical P > wave and is initially north down in tilt or southerly motion. I'm at 1200 > km from the event. > > Randy > ----- Original Message ----- > From: > To: > Sent: Tuesday, August 07, 2007 02:00 > Subject: Digest from 08/06/2007 00:01:22 > > >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 1 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: Mine collaspe or Earthquake >> From: >> Date: Mon, 6 Aug 2007 14:30:17 -0600 >> >> This is a multi-part message in MIME format. >> >> ------=_NextPart_000_0006_01C7D836.4F964430 >> Content-Type: text/plain; >> charset="iso-8859-1" >> Content-Transfer-Encoding: quoted-printable >> >> Hi Folks, I would like your opinion on the event. 070806.084840 4.0 = >> Utah >> >> First report on the news was it was an Earthquake, next report it was no = >> Earthquake but a mine collapse, third report one caused the other. >> >> I don't know enough about mine collapse. Channel 2 News in Boise would = >> like your opinion. >> >> Thanks, Ted >> ------=_NextPart_000_0006_01C7D836.4F964430 >> Content-Type: text/html; >> charset="iso-8859-1" >> Content-Transfer-Encoding: quoted-printable >> >> >> >> > charset=3Diso-8859-1"> >> >> >> >> >>

Hi Folks, I would like your = >> opinion on the=20 >> event. 070806.084840 4.0 Utah

First report on the news was it was an = >> Earthquake,=20 >> next report it was no Earthquake but a mine collapse, third report one = >> caused=20 >> the other.

I don't know enough about mine=20 >> collapse. Channel 2 News in Boise would like your=20 >> opinion.

Thanks, Ted

>> >> ------=_NextPart_000_0006_01C7D836.4F964430-- >> >> >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 2 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: Re: Mine collaspe or Earthquake >> From: "Jerry Payton" >> Date: Mon, 6 Aug 2007 15:36:54 -0500 >> >> This is a multi-part message in MIME format. >> >> ------=_NextPart_000_004B_01C7D83F.9D8C10D0 >> Content-Type: text/plain; >> charset="iso-8859-1" >> Content-Transfer-Encoding: 7bit >> >> Ted, I do not think a mine collapse would cause seismometer reading >> 1700-1800 km away, or farther. We'll see if other stations recorded the >> event, as people come home tonight from work etc. >> >> I personally believe the EQ cause the collapse. That is what is being >> reported on the national news services. >> Regards, >> Jerry >> >> >> ----- Original Message ----- >> From: tchannel1@............ >> To: psn-l@.............. >> Sent: Monday, August 06, 2007 3:30 PM >> Subject: Mine collapse or Earthquake >> >> >> Hi Folks, I would like your opinion on the event. 070806.084840 4.0 > Utah >> >> First report on the news was it was an Earthquake, next report it was no >> Earthquake but a mine collapse, third report one caused the other. >> >> I don't know enough about mine collapse. Channel 2 News in Boise would >> like your opinion. >> >> Thanks, Ted >> >> ------=_NextPart_000_004B_01C7D83F.9D8C10D0 >> Content-Type: text/html; >> charset="iso-8859-1" >> Content-Transfer-Encoding: quoted-printable >> >> >> >> > charset=3Diso-8859-1"> >> >> >> >> >>

Ted, I do not think a mine collapse would cause seismometer reading = >> >> 1700-1800 km away, or farther. We'll see if other stations = >> recorded the=20 >> event, as people come home tonight from work etc.

I personally believe the EQ cause the collapse. That is what = >> is being=20 >> reported on the national news services.

Regards,

Jerry

----- Original Message -----=20 >>

From: > title=3Dtchannel1@............... >> href=3D"mailto:tchannel1@............">tchannel1@............

To: > href=3D"mailto:psn-l@..............">psn-l@..............

Sent: Monday, August 06, 2007 3:30 PM

Subject: Mine collapse or Earthquake

Hi Folks, I would like your = >> opinion on the=20 >> event. 070806.084840 4.0 Utah

First report on the news was it was an = >> Earthquake,=20 >> next report it was no Earthquake but a mine collapse, third report one = >> caused=20 >> the other.

I don't know enough about mine=20 >> collapse. Channel 2 News in Boise would like your=20 >> opinion.

Thanks, Ted

>> >> ------=_NextPart_000_004B_01C7D83F.9D8C10D0-- >> >> >> >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 3 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: Re: Mine collaspe or Earthquake >> From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= >> Date: Mon, 06 Aug 2007 21:14:52 +0000 >> >> Hi >> >> There have been instances of there mines did trigger earthquakes, some >> up to mag 5.0. Once such insdent was recorded in South Africa few years >> ago. However, I can't tell in this case. >> >> USGS has listed this earthquake, >> > http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/uu00007535.php#detai= >> ls >> >> Regards. >> >> --=20 >> J=F3n Fr=EDmann >> http://www.jonfr.com >> http://earthquakes.jonfr.com >> http://www.net303.net >> http://www.mobile-coverage.com/ >> >> >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 4 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: Re: Mine collaspe or Earthquake >> From: "Geoff" >> Date: Mon, 6 Aug 2007 15:20:05 -0700 >> >> Yes, those mines are diamond mines >> typically very dangerous work because >> of a thing called Rock Bursts and >> a rock burst itself might appear as a 3 >> or so earthquake. >> They are very deep hot dangerous misearable work >> from what i understand for those diamond miners. >> It is not uncommon for miners to die that way >> in South Africa. Here in Arizona they (Miners) >> even talk about Rock Bursts >> but i think they are worse the deeper you mine. >> I do not know of any Arizona Mines over a mile deep >> like they have in South Africa. >> >> Regards; >> geoff >> >> ----- Original Message ----- >> From: "Jón Frímann" >> To: >> Sent: Monday, August 06, 2007 2:14 PM >> Subject: Re: Mine collaspe or Earthquake >> >> >> Hi >> >> There have been instances of there mines did trigger earthquakes, some >> up to mag 5.0. Once such insdent was recorded in South Africa few years >> ago. However, I can't tell in this case. >> >> USGS has listed this earthquake, >> > http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/uu00007535.php#details >> >> Regards. >> >> -- >> Jón Frímann >> http://www.jonfr.com >> http://earthquakes.jonfr.com >> http://www.net303.net >> http://www.mobile-coverage.com/ >> >> __________________________________________________________ >> >> Public Seismic Network Mailing List (PSN-L) >> >> To leave this list email PSN-L-REQUEST@.............. with >> the body of the message (first line only): unsubscribe >> See http://www.seismicnet.com/maillist.html for more information. >> >> >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 5 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: Re: Mine collaspe or Earthquake >> From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= >> Date: Tue, 07 Aug 2007 01:45:48 +0000 >> >> Hi >> >> BBC News has a intresting story about this insdent, also some >> information on other related incdents like this one. >> >> http://news.bbc.co.uk/2/hi/americas/6933790.stm >> >> Regards. >> --=20 >> J=F3n Fr=EDmann >> http://www.jonfr.com >> http://earthquakes.jonfr.com >> http://www.net303.net >> http://www.mobile-coverage.com/ >> >> >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 6 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: closed loop folded pendulum >> From: Barry Lotz >> Date: Mon, 6 Aug 2007 20:07:55 -0700 (PDT) >> >> --0-1607043524-1186456075=:29596 >> Content-Type: text/plain; charset=iso-8859-1 >> Content-Transfer-Encoding: 8bit >> >> Hi >> Does anyone know where I could find the math for the sizing the > components for a possible closed loop folded pendulum based on ones given > sensor properties . I tried to email Dave Youden since He made reference to > it in 2003 but his address is old. >> regards >> barry >> >> >> --0-1607043524-1186456075=:29596 >> Content-Type: text/html; charset=iso-8859-1 >> Content-Transfer-Encoding: 8bit >> >>

Does anyone know where I could find the > math for the sizing the components for a possible closed loop folded > pendulum based on ones given sensor properties . I tried to email Dave > Youden since He made reference to it in 2003 but his address is > old.

regards

barry

>> --0-1607043524-1186456075=:29596-- >> >> >> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------. >> | Message 7 | >> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------' >> Subject: Re: closed loop folded pendulum >> From: ChrisAtUpw@....... >> Date: Tue, 7 Aug 2007 00:10:45 EDT >> >> >> --part1_d45.fa8650d.33e94ac5_boundary >> Content-Type: text/plain; charset="US-ASCII" >> Content-Transfer-Encoding: 7bit >> >> In a message dated 2007/08/07, barry_lotz@............. writes: >> >> > Does anyone know where I could find the math for the sizing the >> > components for a possible closed loop folded pendulum based on ones > given sensor >> > properties . I tried to email Dave Youden since He made reference to it > in 2003 >> > but his address is old. >> >> Hi Barry, >> >> See http://jclahr.com/science/psn/youden/index.html >> There is a complete design of both the mechanical construction and >> circuits for the electronics. >> >> Dave Youden can now be found at dyouden@............. >> >> Regards, >> >> Chris Chapman >> >> >> --part1_d45.fa8650d.33e94ac5_boundary >> Content-Type: text/html; charset="US-ASCII" >> Content-Transfer-Encoding: quoted-printable >> >> In a > me= >> ssage dated 2007/08/07, barry_lotz@............. writes:
>>
>>

MARGIN-LEFT= >> : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> Does anyone know > w= >> here I could find the math for the sizing the components for a possible > clos= >> ed loop folded pendulum based on ones given sensor properties . I tried to > e= >> mail Dave Youden since He made reference to it in 2003 but his address is > ol= >> d.

>>
>> Hi Barry,
>>
>>        See > http://jclahr.com/science/psn/youde= >> n/index.html
>>        There is a complete design of both > the=20= >> mechanical construction and circuits for the electronics.
>>
>>        Dave Youden can now be found at HREF= >> =3D"mailto:dyouden@.............">dyouden@.............
>>
>>        Regards,
>>
>>        Chris Chapman
>> >> >> --part1_d45.fa8650d.33e94ac5_boundary-- >> >> >> __________________________________________________________ >> >> Public Seismic Network Mailing List (PSN-L) >> >> To leave this list email PSN-L-DIGEST-REQUEST@.............. with >> the body of the message (first line only): unsubscribe >> See http://www.seismicnet.com/maillist.html for more information. >> > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L)

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