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Coseismic ionospheric perturbations (CIP)

Facts for Prelims (FFP)


Source: PIB


Context: A study conducted by scientists from the Indian Institute of Geomagnetism reveals that earthquake processes, even relatively small ones, leave a distinct mark in the ionosphere.

  • The study demonstrates that coseismic ionospheric perturbations (CIP), caused by vertical crustal movements during earthquakes, can be influenced by multiple fault segments, challenging the assumption of a single source for near-field CIP.
  • The study suggests that space-based observations of ionospheric perturbations could provide valuable insights into earthquake precursors, paving the way for improved earthquake monitoring and prediction.


Coseismic ionospheric perturbations (CIP) refer to disturbances in the Earth’s ionosphere caused by seismic activity, specifically by the vertical crustal movements during an earthquake.

These perturbations result from the excitation of acoustic waves (AWs) in the atmosphere due to the vertical movement of the Earth’s crust during an earthquake