Open AccessObservation of Magnetic Fields Generated by Tsunamis
Author(s) -
Manoj Chandrasekharan,
Maus Stefan,
Chulliat Arnaud
Publication year - 2011
Publication title -
eos, transactions american geophysical union
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 86
eISSN - 2324-9250
pISSN - 0096-3941
DOI - 10.1029/2011eo020002
Subject(s) - magnetometer , epicenter , observatory , seismology , tide gauge , earth's magnetic field , milestone , magnetic field , geophysics , geology , electromagnetic induction , physics , signal (programming language) , geodesy , geography , astronomy , oceanography , cartography , sea level , computer science , quantum mechanics , electromagnetic coil , programming language
Tsunamis produce perturbations in the Earth's magnetic field by electromagnetic induction. Recent deployments of highly accurate magnetometers and the exceptionally deep solar minimum provided ideal conditions to observe these small signals from the tsunami resulting from the strong Chilean earthquake on 27 February 2010. Magnetic observatory measurements on Easter Island, 3500 kilometers west of the epicenter, show a periodic signal of 1 nanotesla, coincident in time with recordings from the local tide gauge. The detection of these magnetic signals represents a milestone in understanding tsunami‐induced electromagnetic effects.