Morgan Florence- Week 6

The fault-plane solution for the 1987 Whittier Narrows earthquake showed a moderately dipping fault plane with an east-west strike. Re-leveling after the earthquake showed an uplifted area extending from the Santa Fe Springs anticline northward across the intervening La Habra syncline to the Montebello anticline. Seismic profiles across the up-dip projection of the active axial surface between the Santa Fe Springs anticline and low-dipping strata to the south provide structural data within 15 m of the surface. Borehole traverses and trench excavations- a short-term slip rate could be calculated, if these sediments were able to be dated that way.