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Page 1: Earthquakes 1963-1995; m b > 4 Stein and Wysession, 2003 INTRAPLATE NARROW BOUNDARIES DIFFUSE BOUNDARY ZONES
Page 2: Earthquakes 1963-1995; m b > 4 Stein and Wysession, 2003 INTRAPLATE NARROW BOUNDARIES DIFFUSE BOUNDARY ZONES

Earthquakes 1963-1995; mb > 4

Stein and Wysession, 2003

INTRAPLATE

NARROW BOUNDARIES

DIFFUSE BOUNDARY ZONES

Page 3: Earthquakes 1963-1995; m b > 4 Stein and Wysession, 2003 INTRAPLATE NARROW BOUNDARIES DIFFUSE BOUNDARY ZONES

• From seismicity and current deformation patterns

Inferred plate boundaries

Gordon and Stein, 1992

Color scale:

Green & Black: Stable

Red: Unambiguous current deformation

Orange: Likely current deformation (earthquakes)

Yellow: Maybe current deformation (from plate cicuits)

Page 4: Earthquakes 1963-1995; m b > 4 Stein and Wysession, 2003 INTRAPLATE NARROW BOUNDARIES DIFFUSE BOUNDARY ZONES

relative plate velocities based on seafloor spreading rates and directions plus directions from earthquake slip vectors

Page 5: Earthquakes 1963-1995; m b > 4 Stein and Wysession, 2003 INTRAPLATE NARROW BOUNDARIES DIFFUSE BOUNDARY ZONES

NNR-NUVEL-1A

http://sps.unavco.org/crustal_motion/dxdt/dxdt.html

http://sps.unavco.org/crustal_motion/dxdt/dxdt.html
http://sps.unavco.org/crustal_motion/dxdt/dxdt.html
http://sps.unavco.org/crustal_motion/dxdt/dxdt.html
http://sps.unavco.org/crustal_motion/dxdt/dxdt.html
http://sps.unavco.org/crustal_motion/dxdt/dxdt.html
http://sps.unavco.org/crustal_motion/dxdt/dxdt.html
http://sps.unavco.org/crustal_motion/dxdt/dxdt.html

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