| Animation
of Rayleigh Waves: Rayleigh Waves are the most damaging
waves caused by earthquakes. This animation illustrates the reverse
elliptical dynamics underlying Rayleigh Waves that cause such intense
shifting during an earthquake. |
|
| How
to Brace an Unsecured Cripple Wall: many houses have
a cripple wall supporting them which provides a crawl space underneath
the house. However, unsecured cripple walls can easily collapse
during an earthquake. This animation provides a brief overview of
basic methods for securing a cripple wall. |
|
| San
Andreas Shifts: this animation demonstrates the relationship
between earthquake magnitude and fault movement. Small earthquakes
emit mainly fast-moving high-frequency waves, whereas large earthquakes
not only emit high-frequency waves but also low-frequency slow-moving
waves. |
|
| Chimney
Failure and Bracing: this animation illustrates the
collapse of an unreinforced brick masonry chimney, and proper methods
for structural reinforcement. |
|
| Lake
Elsinore Sequence: this animation illustrates the creation
of Lake Elsinore due to fault shifting. |
|
| Signal
Hill Sequence: this animation illustrates a fault bend
pushing up the ground between the faults to form a hill, in this
case one similar to Signal Hill in the Los Angeles region. |
|
| Seismic
Propagation: this animation illustrates how seismic
waves move more rapidly with lower amplitude through hard dense
rock as opposed to soft sediment. |
|
| Northridge
2D Earthquake Fault Movement: this animation illustrates
the "blind thrust" fault of the 1994 Northridge earthquake. |
|
| Landers
Earthquake: this animation illustrates the multi-fault
nature of the 1992 Landers earthquake and demonstrates the advanced
computational simulation of the underlying seismic dynamics created
by Prof. Kim Olsen of San Diego State University. |
|
| San
Andreas 265-mile-wide rupture: this animation illustrates
the 250-mile-wide extent of the 1906 rupture of San Andreas fault
in northern california. |
|
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