JDR Vol.14 No.5 pp. 744-754
doi: 10.20965/jdr.2019.p0744


Installation of New GNSS Network Around Kusatsu-Shirane Volcano, Japan: Its Perspective and the First Result

Rina Noguchi*,**,†, Tatsuji Nishizawa**, Wataru Kanda**, Takahiro Ohkura***, and Akihiko Terada**

*Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan

Corresponding author

**Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, Tokyo, Japan

***Aso Volcanological Laboratory, Graduate School of Science, Kyoto University, Kumamoto, Japan

November 30, 2018
May 12, 2019
August 1, 2019
Kusatsu-Shirane volcano, global navigation satellite system, crustal deformation, magma reservoir

Crustal deformation is essential information for monitoring volcanic activity. In the summit area of the Kusatsu-Shirane Volcano (KSV), a dense Global Navigation Satellite System (GNSS) network has been operating near the recent volcanic center, Yugama crater. This network is sensitive to shallow depth activity, such as phreatic eruptions at the summit area, but is not applicable to deep magmatic activity, suggested to have been occurring for thousands of years by recent geological studies. Aiming to detect magmatic activity at a certain depth, we installed a new GNSS network near KSV. The observation sites were selected based on the crustal deformation pattern calculated for several intrusive events of the deep-seated magma. First, the GNSS sites for campaign observation were installed at eight locations in 2017. Then, four continuous sites commenced operation after a phreatic eruption at Mt. Motoshirane in January 2018. Here, we show the results of the first and second observation campaigns, operating in October 2017 and February 2018. Coordinate values are computed by precise point positioning with ambiguity resolution (PPP-AR) analysis and are used to calculate the displacement and the baseline length change during this period. The uncertainties of the calculated coordinate values are sufficiently small (less than 4.5 mm) except at some sites for which the data possibly include multipath errors due to trees and snow. Although any deformation associated with the 2018 eruption of Mt. Motoshirane is not detected, subsequent observations would contribute to monitoring long-term activity near KSV.

Cite this article as:
R. Noguchi, T. Nishizawa, W. Kanda, T. Ohkura, and A. Terada, “Installation of New GNSS Network Around Kusatsu-Shirane Volcano, Japan: Its Perspective and the First Result,” J. Disaster Res., Vol.14, No.5, pp. 744-754, 2019.
Data files:
  1. [1] H. Tsuya, “Explosive activity of volcano Kusatu-Sirane in October, 1932,” Bull. Earthq. Res. Inst., Vol.11, No.1, pp. 82-112,1933.
  2. [2] T. Minakami, K. Matsuita, and S. Utibori, “Explosive activities of volcano Kusatu-Sirane during 1938 and 1942 (Part II),” Bull. Earthq. Res. Inst., Vol.20, No.4, pp. 505-526, 1943.
  3. [3] A. Terada, “Kusatsu-Shirane volcano as a site of phreatic eruptions,” J. Geol. Soc. Japan, Vol.124, No.4, pp. 251-270, 2018 (in Japanese with English abstract).
  4. [4] A. Nigorikawa, Y. Ishizaki, N. Kametani, M. Yoshimoto, A. Terada, K. Ueki, and K. Nakamura, “Holocene eruption history of the Motoshirane pyroclastic cone group, Kusatsu-Shirane Volcano,” Japan Geosci. Union Meet. 2016 Abst., SVC 48-11, 2016.
  5. [5] Y. Hayakawa and M. Yui, “Eruptive History of the Kusatsu Shirane Volcano,” Quaternary Res., Vol.28, Issue 1, pp. 1-17, 1989 (in Japanese with English abstract).
  6. [6] Japan Meteorological Agency, “44. Kusatsu-Shiranesan,” National Catalogue of the Active Volcanoes in Japan, 4th edition, 25pp., 2013.
  7. [7] M. Yoshimoto, K. Nakamura, A. Nigorikawa, A. Terada, and Y. Ishizaki, “Preliminary report for tephra stratigraphy at the flank of Kusatsu-Shirane volcano,” 2013 Fall Meet. Volcanol. Soc. Japan, Abst., p. 39, 2013 (in Japanese).
  8. [8] N. Kametani, Y. Ishizaki, M. Yoshimoto, and A. Terada, “Holocene eruption history of Kusatsu-Shirane volcano,” Vol. Soc. Japan, 2017, Abst., P084, p. 204, 2017.
  9. [9] N. Kametani, Y. Ishizaki, M. Yoshimoto, and A. Terada, “Eruption history of the Shirane Pyroclastic Cone Group (SPCG), Kusatsu-Shirane volcano, from trench survey and 14C dating: eruption ages of a crater chain and the Yumi-ike maar on the southern foot of the SPCG,” Japan Geosci. Union Meet. 2018 Abst., SVC41-P11, 2018.
  10. [10] K. Mogi, “Relations between eruptions of various volcanoes and the deformations of the ground surfaces around them,” Bull. Earthq. Res. Inst. Vol.36, No.2, pp. 99-134, 1958.
  11. [11] Meteorological Research Institute, “Studies on evaluation method of volcanic activity,” Tech. Rep. Meteorol. Res. Inst., doi:10.11483/mritechrepo.53, 2008 (in Japanese).
  12. [12] K. Fukui, S. Ando, F. Fujiwara, S. Kitagawa, K. Kokubo, S. Onizawa, T. Sakai, T. Shimbori, A. Takagi, T. Yamamoto, H. Yamasato, and A. Yamazaki, “MaGCAP-V: a Windows-based software to analyze ground deformation and geomagnetic change in volcanic areas,” Abstr. IAVCEI, 4W_2C-P8, 2013.
  13. [13] J. F. Zumberge, M. B. Heflin, D. C. Jefferson, M. M. Watkins, and F. H. Webb, “Precise point positioning for the efficient and robust analysis of GPS data from large networks,” J. Geophys. Res., Solid Earth, Vol.102, No.B3, pp. 5005-5017, 1997.
  14. [14] F. Lyard, F. Lefevre, T. Letellier, and O. Francis, “Modelling the global ocean tides: modern insights from FES2004,” Ocean Dynam., Vol.56, No.5-6, pp. 394-415, 2006.
  15. [15] J. Boehm, A. Niell, P. Tregoning, and H. Schuh, “Global Mapping Function (GMF): a new empirical mapping function based on numerical weather model data,” Geophys. Res. Lett. Vol.33, No.7, L07304, 2006.
  16. [16] A. Hashima, T. W. Becker, A. M. Freed, H. Sato, and D. A. Okaya, “Coseismic deformation due to the 2011 Tohoku-oki earthquake: influence of 3-D elastic structure around Japan,” Earth, Planets and Space, Vol.68, No.1, Article: 159, 2016.

*This site is desgined based on HTML5 and CSS3 for modern browsers, e.g. Chrome, Firefox, Safari, Edge, IE9,10,11, Opera.

Last updated on Aug. 21, 2019