Exploring Planet Earth

Blind Thrust Fault Earthquake Rupture Animation (Northridge, 1994)Brad Aagaard, USGS

http://pasadena.wr.usgs.gov/office/baagaard/research/animations/animations.htmlThe fault rupture will be visible in the animation. Displacements (magnified 3000

times) will be visible by the movement of the mesh from the model. The amplitude of motions and seismic waves is color coded according to ground velocity.

http://web.ics.purdue.edu/~braile/new/AagaardBlindThrustAnimation.ppt

http://pasadena.wr.usgs.gov/office/baagaard/research/animations/animations.html

Exploring Planet Earth

http://pasadena.wr.usgs.gov/office/baagaard/research/animations/animations.html

Animation from B. Aagaard (place in folder with PPT – may have to re-insert .gif file): http://web.ics.purdue.edu/~braile/new/BlindThrustSlice.gif

Seismic/Eruption view of January 17, 1994 M6.7 Northridge earthquake

Note color coded depths of main shock and aftershocks that indicate a south dipping fault

Seismic/Eruption cross section view of January 17, 1994 M6.7 Northridge earthquake

Note color coded depths of main shock and aftershocks that indicate a south dipping fault

0

10

20

Dep

th (

km)

Distance (km)

0 10 20

South North

-10-20

Main Shock

Aftershocks with depth fixed at 5 km; not able to determine depth accurately

Exploring Planet Earth

Main shock and aftershocks of the 1989 M6.9 Loma Prieta earthquake, map and cross section view; note approximately rectangular area of the fault plane that

slipped and the bi-lateral rupture from deepest part of fault plane