ELF radar system proposed for localized D-region ionospheric anomalies

Jamesina J. Simpson*, Allen Taflove

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


This letter proposes a novel extremely low frequency (ELF) radar for localized D-region (altitude < 95 km) ionospheric anomalies that have been generated by natural geophysical processes. The proposed system would use the former U.S. Navy Wisconsin Transmitting Facility as a distant well-characterized impulsive ELF source. Sample calculations that demonstrate how passive vertical E-field detectors could characterize ionospheric conductivity depressions of variable diameter located above Los Angeles are provided. These calculations have been obtained using our recently developed three-dimensional whole-Earth electromagnetic wave propagation model based upon the rigorous finite-difference time-domain solution of Maxwell's equations. A key potential application of the proposed ELF radar system is the detection of hypothesized ionospheric earthquake precursors.

Original languageEnglish (US)
Article number1715304
Pages (from-to)500-503
Number of pages4
JournalIEEE Geoscience and Remote Sensing Letters
Issue number4
StatePublished - Oct 2006
Externally publishedYes


  • Earthquakes
  • Extremely low frequency (ELF)
  • Finite difference time domain (FDTD)
  • Ionospheric disturbances
  • Radar
  • Remote sensing

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Electrical and Electronic Engineering


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