Bars of Pressure
Posted by Barbara on December 01, 2005 at 20:32:28:

I was reading (or trying to read) an article about seismic stress change along the Anatolian Fault in Turkey and how it could apply to the San Andreas, but I am confused about a very simple thing. How do they measure the increases in stress in bars? For instance, on page 17 of this article (link below) it discusses the 1992 Landers quake which was followed 3.5 hours later by the Big Bear quake (due to increased bars of stress transferred). Then, it states "the Landers earthquake increased the stress 40 km away on the San Andreas fault by an estimated 2-6 bars,...with (approximately) 150 mm slip needed to relieve the imposed stress."

How are these stress changes measured? And how did they know where to look for stress changes after these back-to-back events?

So much to learn -- so little time.



Follow Ups:
     ● Re: Bars of Pressure - Don in Hollister  20:44:53 - 12/1/2005  (31292)  (1)
        ● Re: Bars of Pressure - Barbara  23:03:54 - 12/1/2005  (31295)  (2)
           ● for Barbara - Todd  12:08:15 - 12/3/2005  (31380)  (1)
              ● Re: for Barbara - chris in suburbia  14:00:28 - 12/3/2005  (31382)  (1)
                 ● Re: for Barbara - Don in Hollister  14:27:32 - 12/3/2005  (31383)  (1)
                    ● I learned something new - Todd  00:34:23 - 12/4/2005  (31403)  (1)
                       ● Re: I learned something new - Don in Hollister  01:03:26 - 12/4/2005  (31404)  (0)
           ● Re: Bars of Pressure - chris in suburbia  14:30:54 - 12/2/2005  (31327)  (0)