## PSN-L Email List Message

Subject: Re: QUESTION about Slip Faults
From: "Jerry Payton" gpayton880@.......
Date: Sun, 27 Jan 2008 13:35:41 -0600

```Thanks a million!  Now, I think I understand.  It is the relative movement
of the "opposite" block that determines the description.  Soooo simple.
Regards,
Jerry

----- Original Message -----
From: Stephen & Kathy
To: psn-l@..............
Sent: Sunday, January 27, 2008 1:27 PM
Subject: Re: QUESTION about Slip Faults

It doesn't matter which scenario you pick, (watching the opposite block from
east, or west, or straddling the fault facing north, or south), the relative
motion to the body will always be the same.  The opposite block will move
left, or the block on the left side will move toward you.  Changing the way
you face doesn't matter.  A very simple test.  Get two pieces of paper lay
them side by side.  draw arrows for the direction you want them to move
relative to each other.  Stand on one, face the other and move it in the
direction of its arrow,, then stand on the other paper, face the original
and move it in the direction of its arrow.  Notice, they both moved the same
relative to your body,,   left for a left lateral fault.  Now straddle, put
one paper in front of each foot.  Notice the left paper arrow is pointing
toward you,,  go to the opposite side of the paper and face the opposite
direction,,  the arrow on the left paper, (the other paper) is still
pointing toward you.   This is literally what I had to do to get it through
my simple mind.
Stephen
PSN Station #55

Jerry Payton wrote:
Jerry- You do not straddle the fault but stand on 1 side and see the other
side go Left or Right; Left lateral fault & Right lateral fault.

I think we are saying the same thing.  I was quoting the USGS site:
http://earthquake.usgs.gov/learning/glossary.php?term=left-lateral

My confusion is HOW to accurately communicate to someone else about a
particular fault.  If I said it was "right-lateral", how would the other
person visualize what I was saying?  Describing a Normal Fault, one would
give the Strike, Dip and etc.  The person then could visualize the whole
thing.  Maybe, I am just over emphasizing a point?

(My email is gpayton@....... if you want to talk about the digs.........)

Jerry

Thanks a million!  Now, I think I understand.  It is the =
relative=20
movement of the "opposite" block that determines the description.  =
Soooo=20
simple.
Regards,
Jerry

----- Original Message -----=20
From: Stephen =
&=20
Kathy
To: psn-l@..............
Sent: Sunday, January 27, 2008 1:27 PM
Subject: Re: QUESTION about Slip Faults
It doesn't matter which scenario you =
pick,=20
(watching the opposite block from east, or west, or straddling the fault =
facing=20
north, or south), the relative motion to the body will always be the =
same. =20
The opposite block will move left, or the block on the left side will =
move=20
toward you.  Changing the way you face doesn't matter.  A very =
simple=20
test.  Get two pieces of paper lay them side by side.  draw =
arrows for=20
the direction you want them to move relative to each other.  Stand =
on one,=20
face the other and move it in the direction of its arrow,, then stand on =
the=20
other paper, face the original and move it in the direction of its =
arrow. =20
Notice, they both moved the same relative to your body,,   =
left for a=20
left lateral fault.  Now straddle, put one paper in front of each=20
foot.  Notice the left paper arrow is pointing toward you,,  =
go to the=20
opposite side of the paper and face the opposite direction,,  the =
arrow on=20
the left paper, (the other paper) is still pointing toward =
you.   This=20
is literally what I had to do to get it through my simple =
mind. =20
Stephen  PSN Station #55 Jerry Payton =
wrote:=20

Jerry- You do not straddle the fault but stand on 1 side and see =
the=20
other side go Left or Right; Left lateral fault & Right lateral=20
fault.

I think we are saying the same thing.  I was quoting =
the=20
USGS site:  http://earthquake.usgs.gov/learning/glossary.php?term=3Dleft-lateral=

My confusion is HOW to accurately =
communicate to=20
someone else about a particular fault.  If I said it was =
"right-lateral",=20
how would the other person visualize what I was saying?  =
Describing a=20
Normal Fault, one would give the Strike, Dip and etc.  The person =
then=20
could visualize the whole thing.  Maybe, I am just over =
emphasizing a=20
point?

(My email is gpayton@....... if you=20
want to talk about the digs.........)

Jerry
```