What is particularly interesting about this slump picture is that it was taken in the year 1907 in the Berkeley Hills just east of San Francisco. Needless to say, this area has now been built up. Houses probably now stand where the slump took place. Question: Do you think that the danger of slumping is over for the Berkeley Hills region, now that it has been built up? Has the danger perhaps increased? What factors might increase the risk of slumping in areas such as the Berkeley Hills, or the Palos Verdes Peninsula and Pacific Palisades regions?