Figure 2
Observed magnetic field perturbations and sea level changes associated with the 2010 Chilean earthquake tsunami.
Observed vertical magnetic field perturbations (black) and sea bottom pressures (red) induced by the tsunami at a depth of 4800 m at Site 8 of the seafloor array network. The tsunami arrived at the network region at 1600–1700 on 27 February. The sea-bottom pressure recorded by the differential pressure gauge (DPG) was corrected for the frequency response19 and the in situ amplitude response of predicted ocean tides26. The waveforms were high-pass filtered at 0.0002 Hz. The magnetic field perturbation and the seafloor pressure change associated with the tsunami were ~0.5 nT and ~1200 Pa, respectively.
