## PSN-L Email List Message

Subject: Re: QUESTION about Slip Faults
From: Stephen & Kathy skmort@............
Date: Sun, 27 Jan 2008 11:27:46 -0800

```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
>
> *Jerry*

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.=A0 The opposite block will move left, or the block on=

the left side will move toward you.=A0 Changing the way you face doesn't
matter.=A0 A very simple test.=A0 Get two pieces of paper lay them side b=
y
side.=A0 draw arrows for the direction you want them to move relative to
each other.=A0 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.=A0 Notice, they both moved the
same relative to your body,,=A0=A0 left for a left lateral fault.=A0 Now
straddle, put one paper in front of each foot.=A0 Notice the left paper
arrow is pointing toward you,,=A0 go to the opposite side of the paper
and face the opposite direction,,=A0 the arrow on the left paper, (the
other paper) is still pointing toward you.=A0=A0 This is literally what I=

had to do to get it through my simple mind.
=A0 Stephen
=A0 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.=A0
=A0
I think we are saying the same thing.=A0 I was quoting the=

USGS site:=A0 http://earthquake.usgs.gov/learning/glossary.php?term=3Dleft-latera=
l
=A0
My confusion is HOW to accurately
communicate to someone else about a particular fault.=A0 If I said it was=

"right-lateral", how would the other person visualize what I was
saying?=A0 Describing a Normal Fault, one would give the Strike, Dip and
etc.=A0 The person then could visualize the whole thing.=A0 Maybe, I am
just over emphasizing a point?
=A0
(My email is gpayton@.......
if you want to talk about the digs.........)
=A0
Jerry

```