Abstract
To investigate the postseismic crustal deformation associated with the 2004 mid-Niigata prefecture earthquake (M6.8), we newly started GPS observation to fill a gap of the nationwide continuous GPS network. Our GPS sites were mainly distributed in the focal region without permanent GPS site, and succeeded in obtaining the postseismic deformation. Coseismic displacements of two aftershocks were clearly detected because of immediate observation. Estimated fault parameters of the aftershock (M5.9) on November 8 occurring just beneath our GPS network indicated that geodetic data could be explained by either east- or west-dipping fault model inferred from detailed aftershock data. Moreover, clear postseismic deformation, which could be characterized by a logarithmic decay function, was observed. This signal probably suggests possible aseismic slip. Our results indicated that dense GPS observation could give important and interesting data to clarify the properties of shallow inland middle-size earthquakes.
| Original language | English |
|---|---|
| Pages (from-to) | 661-665 |
| Number of pages | 5 |
| Journal | earth, planets and space |
| Volume | 57 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jan 1 2005 |
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All Science Journal Classification (ASJC) codes
- Geology
- Space and Planetary Science
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A dense GPS observation immediately after the 2004 mid-Niigata prefecture earthquake. / Takahashi, Hiroaki; Matsushima, Takeshi; Kato, Teruyuki; Takeuchi, Akira; Yamaguchi, Teruhiro; Kohno, Yuhki; Katagi, Takeshi; Fukuda, Jun'ichi; Hatamoto, Kazuya; Doke, Ryousuke; Matsu'ura, Yuki; Kasahara, Minoru.
In: earth, planets and space, Vol. 57, No. 7, 01.01.2005, p. 661-665.Research output: Contribution to journal › Article
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TY - JOUR
T1 - A dense GPS observation immediately after the 2004 mid-Niigata prefecture earthquake
AU - Takahashi, Hiroaki
AU - Matsushima, Takeshi
AU - Kato, Teruyuki
AU - Takeuchi, Akira
AU - Yamaguchi, Teruhiro
AU - Kohno, Yuhki
AU - Katagi, Takeshi
AU - Fukuda, Jun'ichi
AU - Hatamoto, Kazuya
AU - Doke, Ryousuke
AU - Matsu'ura, Yuki
AU - Kasahara, Minoru
PY - 2005/1/1
Y1 - 2005/1/1
N2 - To investigate the postseismic crustal deformation associated with the 2004 mid-Niigata prefecture earthquake (M6.8), we newly started GPS observation to fill a gap of the nationwide continuous GPS network. Our GPS sites were mainly distributed in the focal region without permanent GPS site, and succeeded in obtaining the postseismic deformation. Coseismic displacements of two aftershocks were clearly detected because of immediate observation. Estimated fault parameters of the aftershock (M5.9) on November 8 occurring just beneath our GPS network indicated that geodetic data could be explained by either east- or west-dipping fault model inferred from detailed aftershock data. Moreover, clear postseismic deformation, which could be characterized by a logarithmic decay function, was observed. This signal probably suggests possible aseismic slip. Our results indicated that dense GPS observation could give important and interesting data to clarify the properties of shallow inland middle-size earthquakes.
AB - To investigate the postseismic crustal deformation associated with the 2004 mid-Niigata prefecture earthquake (M6.8), we newly started GPS observation to fill a gap of the nationwide continuous GPS network. Our GPS sites were mainly distributed in the focal region without permanent GPS site, and succeeded in obtaining the postseismic deformation. Coseismic displacements of two aftershocks were clearly detected because of immediate observation. Estimated fault parameters of the aftershock (M5.9) on November 8 occurring just beneath our GPS network indicated that geodetic data could be explained by either east- or west-dipping fault model inferred from detailed aftershock data. Moreover, clear postseismic deformation, which could be characterized by a logarithmic decay function, was observed. This signal probably suggests possible aseismic slip. Our results indicated that dense GPS observation could give important and interesting data to clarify the properties of shallow inland middle-size earthquakes.
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U2 - 10.1186/BF03351844
DO - 10.1186/BF03351844
M3 - Article
VL - 57
SP - 661
EP - 665
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1343-8832
IS - 7
ER -