In 2003, an earthquake in Japan generated \(1.1 \mathrm{~Hz}\) waves that traveled outward at \(7.0 \mathrm{~km} / \mathrm{s} .200 \mathrm{~km}\) to the west, seismic instruments recorded a maximum acceleration of \(0.25 \mathrm{~g}\) along the east-west axis.

a. How much time elapsed between the earthquake and the first detection of the waves?

b. Was this a transverse or a longitudinal wave?

c. What was the wavelength?

d. What was the maximum horizontal displacement of the ground as the wave passed?