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Science Forum Index » Geology - Earthquakes Forum » Central CA swarm
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| Skywise |
 Posted: Tue Jan 29, 2008 1:11 am |
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| mirage |
| Posted: Tue Jan 29, 2008 8:01 am |
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On Jan 28, 9:11 pm, Skywise <i...@oblivion.nothing.com> wrote:
Quote: Anyoen notice the swarm of small quakes between Coalinga and
Avenal?
Brian
Thanks, Brian. That area is historically very busy with small quakes.
(See http://quake.usgs.gov/info/hist_seismicity/index.html ) I've
always assumed that these are on a southward extension of the San
Joaquin fault system. Anyone know the actual identity of the faults
running through the area?
--mirage |
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| mirage |
| Posted: Tue Jan 29, 2008 8:55 am |
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On Jan 29, 10:01 am, mirage <mjohnso...@earthlink.net> wrote:
Quote: . . . Anyone know the actual identity of the faults
running through the area?
--mirage
And a little searching, http://pubs.usgs.gov/of/2006/1149/ , produces
the answer to his own question.
--mirage |
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| Skywise |
| Posted: Tue Jan 29, 2008 5:02 pm |
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| Skywise |
| Posted: Tue Jan 29, 2008 5:31 pm |
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mirage <mjohnson37@earthlink.net> wrote in news:a771805e-73be-4797-a87b-
b043bc586a73@e32g2000prn.googlegroups.com:
Quote: I've
always assumed that these are on a southward extension of the San
Joaquin fault system.
I would tend to agree with you. I think only part of that system
has been mapped so far.
I've been spedning sime time with the USGS Quarternary Fault and
Fold Database and some GIS software with elevation maps and I
don't thinkt he fault stops just cuz there's no squiggly line
on the map anymore. The geographic features where the fault is
mapped continues southward at least down to parallel of the SA
Parkfield segment, and there have been quakes in that area as
well, including after the recent Parkfield quake.
Haven't read Steins paper yet, he may cover this.
Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism
Seismic FAQ: http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html
Quake "predictions": http://www.skywise711.com/quakes/EQDB/index.html
Sed quis custodiet ipsos Custodes? |
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| Guest |
| Posted: Tue Jan 29, 2008 7:58 pm |
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In article <13pv6qcglfph4e7@corp.supernews.com>,
Skywise <into@oblivion.nothing.com> wrote:
Quote: I don't thinkt he fault stops just cuz there's no squiggly line
on the map anymore.
Are you saying that Qal can cover a lot of faults? |
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| Felix Tilley |
| Posted: Thu Jan 31, 2008 2:29 am |
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On Tue, 29 Jan 2008 05:11:10 +0000, Skywise wrote:
Is that the EQ that killed two school children walking home from school,
when a masonry wall collapsed on them?
I was working on the second story lab at Hughes in Canaoga Park when it
happened. I didn't feel it. They said we were having an EQ. I told them
they were imagining things. Then they pointed up to the floating
fluorescent lights hanging from the ceiling. They were swinging.
But I never felt it.
Felix |
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| Timberwoof |
| Posted: Thu Jan 31, 2008 1:00 pm |
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In article <pan.2008.01.31.06.29.13.916799@linux.site>,
Felix Tilley <ftilley@linux.site> wrote:
Quote: On Tue, 29 Jan 2008 05:11:10 +0000, Skywise wrote:
Anyoen notice the swarm of small quakes between Coalinga and
Avenal?
http://www.data.scec.org/recenteqs/Maps/120-36.html
This is the general location of the 1983 M6.4 Coalinga quake.
Brian
Is that the EQ that killed two school children walking home from school,
when a masonry wall collapsed on them?
I was working on the second story lab at Hughes in Canaoga Park when it
happened. I didn't feel it.
Were sitting on a chair with wheels?
Quote: They said we were having an EQ. I told them
they were imagining things. Then they pointed up to the floating
fluorescent lights hanging from the ceiling. They were swinging.
But I never felt it.
Depending on the strength of an earthquake, something as simple as
walking or rolling across the floor in a chair is enough to make you not
feel a small earthquake that others can feel.
I was once stopped on a freeway off-ramp when a small earthquake struck.
I thought, odd, this road just got repaved. It has no bumps. Odder
still: I was not moving!
--
Timberwoof <me at timberwoof dot com> http://www.timberwoof.com
"When you post sewage, don't blame others for
emptying chamber pots in your direction." ‹Chris L. |
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