Figure 2.5 shows a vertical-component seismogram of the 1989 Loma Prieta earthquake recorded in Finland. Make an estimate of the maximum strain recorded at this site. Hints: 1 micron = 10−6 m, note...

Figure 2.5 shows a vertical-component seismogram of the 1989 Loma Prieta earthquake recorded in Finland. Make an estimate of the maximum strain recorded at

this site. Hints: 1 micron = 10−6 m, note that the time axis is in 100s of seconds, assume the Rayleigh surface wave phase velocity at the dominant period is 3.9 km/s,

remember that strain is proportional to ∂uz/∂x, Table 3.1 may be helpful.