TY - JOUR
T1 - Long-distance propagation of ionospheric disturbance generated by the 2011 off the Pacific coast of Tohoku Earthquake
AU - Chen, C. H.
AU - Saito, A.
AU - Lin, C. H.
AU - Liu, J. Y.
AU - Tsai, H. F.
AU - Tsugawa, T.
AU - Otsuka, Y.
AU - Nishioka, M.
AU - Matsumura, M.
N1 - Funding Information:
Acknowledgments. C. H. Chen is supported by the Interchange Association, Japan (IAJ). The GPS data were provided by the Geospatial Information Authority in Japan (GEONET, http://www.gsi.go.jp/ENGLISH/index.html), Korea Astronomy and Space Science Institute in Korea (KASI, http://www.gps.re.kr/gpsenglish/), GPS Data Download Service in Korea (NGII, http://www.ngii.go.kr/eng/index.do), Central Weather Bureau Geophysical Database Management System in Taiwan (TWN, http://gdms.cwb.gov.tw/index.php), and International GNSS service (IGS, http://igscb.jpl.nasa.gov/).
PY - 2011
Y1 - 2011
N2 - Propagation of the initial ionospheric total electron content (TEC) disturbances generated by the 2011 off the Pacific coast of Tohoku Earthquake at 05:46:23 UT on March 11, 2011, was investigated with ground-based Global Positioning System (GPS) receivers in the east-Asian region. It was found that the initial ionospheric disturbance formed a zonal wave front after the earthquake occurrence. Four zonal wave fronts of this initial ionospheric disturbance were observed to travel southward from Japan to Taiwan with a velocity of about 1,000- 1,700 m/s. This study further found that the direction of the wave vector rotated from the south-southwest to the south-southeast as it traveled from Japan to Taiwan. The meridional propagation of the coseismic ionospheric disturbances is consistent with those observed after previous intense earthquakes. The temporal evolutions of initial ionospheric disturbances, after the earthquake, near the epicenter was observed in two-dimensions. The directivity of the disturbances was caused by a geomagnetic field effect.
AB - Propagation of the initial ionospheric total electron content (TEC) disturbances generated by the 2011 off the Pacific coast of Tohoku Earthquake at 05:46:23 UT on March 11, 2011, was investigated with ground-based Global Positioning System (GPS) receivers in the east-Asian region. It was found that the initial ionospheric disturbance formed a zonal wave front after the earthquake occurrence. Four zonal wave fronts of this initial ionospheric disturbance were observed to travel southward from Japan to Taiwan with a velocity of about 1,000- 1,700 m/s. This study further found that the direction of the wave vector rotated from the south-southwest to the south-southeast as it traveled from Japan to Taiwan. The meridional propagation of the coseismic ionospheric disturbances is consistent with those observed after previous intense earthquakes. The temporal evolutions of initial ionospheric disturbances, after the earthquake, near the epicenter was observed in two-dimensions. The directivity of the disturbances was caused by a geomagnetic field effect.
UR - http://www.scopus.com/inward/record.url?scp=83155184042&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=83155184042&partnerID=8YFLogxK
U2 - 10.5047/eps.2011.06.026
DO - 10.5047/eps.2011.06.026
M3 - Article
AN - SCOPUS:83155184042
VL - 63
SP - 881
EP - 884
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1343-8832
IS - 7
ER -