Movies of Earthquake Waves
During the deployment of the LB3D and ELB arrays, a few small local
earthquakes were recorded. The arrays are dense enough that the waves from these earthquakes can be seen traversing the network. The first event (Carson EQ)
was recorded by the LB3D network. It was located 5 km to the west of the network and at a depth of 10 km. The second event (Cypress EQ) was recorded by the
ELB network and was a magnitude 2.0 event at a depth of 18 km.
- Before the earthquake waves arrive, you can see the noise generated by the 405 and 710 freeways, and
the Long Beach Oilfield (just south of the 405).
- Once the waves start to cross Long Beach, the wavefronts are broken up along strands of the Newport-Inglewood
- Once the waves appear on the network there appears to be secondary sources - either scatterers or
actual additional micro-earthquake events.
- One of the secondary sources has a higher apparent frequency indicating that it is likely an