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| Titel |
Comparison of simultaneous variations of the ionospheric total electron content and geomagnetic field associated with strong earthquakes |
| VerfasserIn |
Sh. Naaman, L. S. Alperovich, Sh. Wdowinski, M. Hayakawa, E. Calais |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 1, no. 1/2 ; Nr. 1, no. 1/2, S.53-59 |
| Datensatznummer |
250000021
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| Publikation (Nr.) |
 copernicus.org/nhess-1-53-2001.pdf |
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| Zusammenfassung |
| 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. |
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