Large SCR earthquakes occur preferentially in young extended terranes.

1
Large SCR earthquakes occur preferentially in
young extended terranes.
Figure A71

• Application to CEUS Adjacent Canada
• (New Madrid, Charleston set aside as special
  cases)
• Extended
• Mmax 8.3 in rifts
• Mmax 7.7 in passive margins (Atlantic and Gulf
  seaboards, Cambrian passive margin)
• Non-extended
• Mmax 6.4 in Paleozoic orogens (Appalachian and
  Ouachita Mountains)
• Mmax 6.8 in cratons (midcontinent platform,
  Canadian shield)

2
Figure A72
3
Figure A73
4
Figure A74
5
Figure A75
6
Figure A76
7
Pros, Cons, Uncertainties
Figure A77

• Pro
• Global catalog avoids small-sample problem
• Con
• Whats an analog?
• Uncertainties
• 1. Choice and justification of analogs
• 2. M values of individual earthquakes
• 3. Robustness of histograms