Comparison of simultaneous variations of the ionospheric total electron content and geomagnetic field associated with strong earthquakes

Sh Naaman, L. S. Alperovich, Sh Wdowinski, M. Hayakawa, E. Calais

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In this paper, perturbations of the ionospheric Total Electron Content (TEC) are compared with geomagnetic oscillations. Comparison is made for a few selected periods, some during earthquakes in California and Japan and others at quiet periods in Israel and California. Anomalies in TEC were extracted using Global Positioning System (GPS) observations collected by GIL (GPS in Israel) and the California permanent GPS networks. Geomagnetic data were collected in some regions where geomagnetic observatories and the GPS network overlaps. Sensitivity of the GPS method and basic wave characteristics of the ionospheric TEC perturbations are discussed. We study temporal variations of ionospheric TEC structures with highest reasonable spatial resolution around 50 km. Our results show no detectable TEC disturbances caused by right-lateral strike-slip earthquakes with minor vertical displacement. However, geomagnetic observations obtained at two observatories located in the epicenter zone of a strong dip-slip earthquake (Kyuchu, M = 6.2, 26 March 1997) revealed geomagnetic disturbances occurred 6-7 h before the earthquake.

Original languageEnglish (US)
Pages (from-to)53-59
Number of pages7
JournalNatural Hazards and Earth System Sciences
Volume1
Issue number1-2
DOIs
StatePublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Fingerprint

Dive into the research topics of 'Comparison of simultaneous variations of the ionospheric total electron content and geomagnetic field associated with strong earthquakes'. Together they form a unique fingerprint.

Cite this