Suspected seismo-ionospheric coupling observed by satellite measurements and GPS TEC related to the M7.9 Wenchuan earthquake of 12 May 2008

K. Ryu, M. Parrot, S. G. Kim, K. S. Jeong, J. S. Chae, S. Pulinets, K. I. Oyama

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Anomalous changes in the ionospheric conditions related to the Wenchuan earthquake of 12 May 2008 are investigated using electron density (Ne) from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) and CHAMP satellites, electric field from DEMETER, and GPS-total electron content (TEC) maps. The normalized Ne from the DEMETER satellite reveal that the previously reported TEC increments before the earthquake can be considered as fragments of the gradual equatorial ionization anomaly (EIA) enhancements near the epicenter longitude that began approximately 1 month before the earthquake and reached its maximum with an exceptionally large strength index 8 days prior to the main shock. This feature is indirectly confirmed through the CHAMP Ne and GPS TEC data. Following the EIA intensity peak, disturbances in the Ne and O+ density were observed in the nightside. Based on the concurrent electric field and Ne changes, it is suggested that EIA intensification could be triggered by the E field disturbances over the epicenter.

Original languageEnglish
Pages (from-to)10305-10323
Number of pages19
JournalJournal of Geophysical Research: Space Physics
Volume119
Issue number12
DOIs
Publication statusPublished - 2014 Dec

Fingerprint

earthquakes
ionospherics
Global positioning system
Earthquakes
GPS
electrons
Satellites
earthquake
Electrons
ionization
Ionization
CHAMP
electric field
anomalies
earthquake epicenter
anomaly
disturbances
Electric fields
disturbance
electric fields

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

@article{8310c5878fba40979b0511873e53ecda,
title = "Suspected seismo-ionospheric coupling observed by satellite measurements and GPS TEC related to the M7.9 Wenchuan earthquake of 12 May 2008",
abstract = "Anomalous changes in the ionospheric conditions related to the Wenchuan earthquake of 12 May 2008 are investigated using electron density (Ne) from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) and CHAMP satellites, electric field from DEMETER, and GPS-total electron content (TEC) maps. The normalized Ne from the DEMETER satellite reveal that the previously reported TEC increments before the earthquake can be considered as fragments of the gradual equatorial ionization anomaly (EIA) enhancements near the epicenter longitude that began approximately 1 month before the earthquake and reached its maximum with an exceptionally large strength index 8 days prior to the main shock. This feature is indirectly confirmed through the CHAMP Ne and GPS TEC data. Following the EIA intensity peak, disturbances in the Ne and O+ density were observed in the nightside. Based on the concurrent electric field and Ne changes, it is suggested that EIA intensification could be triggered by the E field disturbances over the epicenter.",
author = "K. Ryu and M. Parrot and Kim, {S. G.} and Jeong, {K. S.} and Chae, {J. S.} and S. Pulinets and Oyama, {K. I.}",
year = "2014",
month = "12",
doi = "10.1002/2014JA020613",
language = "English",
volume = "119",
pages = "10305--10323",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9380",
publisher = "Wiley-Blackwell",
number = "12",

}

Suspected seismo-ionospheric coupling observed by satellite measurements and GPS TEC related to the M7.9 Wenchuan earthquake of 12 May 2008. / Ryu, K.; Parrot, M.; Kim, S. G.; Jeong, K. S.; Chae, J. S.; Pulinets, S.; Oyama, K. I.

In: Journal of Geophysical Research: Space Physics, Vol. 119, No. 12, 12.2014, p. 10305-10323.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Suspected seismo-ionospheric coupling observed by satellite measurements and GPS TEC related to the M7.9 Wenchuan earthquake of 12 May 2008

AU - Ryu, K.

AU - Parrot, M.

AU - Kim, S. G.

AU - Jeong, K. S.

AU - Chae, J. S.

AU - Pulinets, S.

AU - Oyama, K. I.

PY - 2014/12

Y1 - 2014/12

N2 - Anomalous changes in the ionospheric conditions related to the Wenchuan earthquake of 12 May 2008 are investigated using electron density (Ne) from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) and CHAMP satellites, electric field from DEMETER, and GPS-total electron content (TEC) maps. The normalized Ne from the DEMETER satellite reveal that the previously reported TEC increments before the earthquake can be considered as fragments of the gradual equatorial ionization anomaly (EIA) enhancements near the epicenter longitude that began approximately 1 month before the earthquake and reached its maximum with an exceptionally large strength index 8 days prior to the main shock. This feature is indirectly confirmed through the CHAMP Ne and GPS TEC data. Following the EIA intensity peak, disturbances in the Ne and O+ density were observed in the nightside. Based on the concurrent electric field and Ne changes, it is suggested that EIA intensification could be triggered by the E field disturbances over the epicenter.

AB - Anomalous changes in the ionospheric conditions related to the Wenchuan earthquake of 12 May 2008 are investigated using electron density (Ne) from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) and CHAMP satellites, electric field from DEMETER, and GPS-total electron content (TEC) maps. The normalized Ne from the DEMETER satellite reveal that the previously reported TEC increments before the earthquake can be considered as fragments of the gradual equatorial ionization anomaly (EIA) enhancements near the epicenter longitude that began approximately 1 month before the earthquake and reached its maximum with an exceptionally large strength index 8 days prior to the main shock. This feature is indirectly confirmed through the CHAMP Ne and GPS TEC data. Following the EIA intensity peak, disturbances in the Ne and O+ density were observed in the nightside. Based on the concurrent electric field and Ne changes, it is suggested that EIA intensification could be triggered by the E field disturbances over the epicenter.

UR - http://www.scopus.com/inward/record.url?scp=84921734950&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921734950&partnerID=8YFLogxK

U2 - 10.1002/2014JA020613

DO - 10.1002/2014JA020613

M3 - Article

AN - SCOPUS:84921734950

VL - 119

SP - 10305

EP - 10323

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9380

IS - 12

ER -