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Volume 52 Supplement 10

Special Issue: Application of GPS and other space geodetic techniques to Earth Sciences (1)

Real-time observation of tsunami by RTK-GPS

Abstract

A new tsunami observation system has been developed, which employs the RTK-GPS technique to detect a tsunami before it reaches the coast. The system consists of dual-buoys: the Support-buoy, which is sensitive to wind-waves, and the Sensor-buoy, which is of a spar-type and is insensitive to wind-waves. Both buoys are equipped with a GPS antenna. An experiment using this system was carried out for about nine days in March 1999. Observation data were monitored at the onshore base station. The results showed that hourly averaged data is consistent with ocean tides for both buoys. The Sensor-buoy was found not to respond much to wind-waves compared to the Support-buoy. Thus, it may be preferable to use a spar-type buoy for detecting a tsunami efficiently. Furthermore, a simple frequency analysis showed that a tsunami could be easily separated from higher frequency wind waves if a tsunami is superimposed on regular wind waves.

References

  1. Born, G. H., M. E. Parke, P. Axelrad, K. L. Gold, J. Johnson, K. W. Key, D. G. Kubitschek, and E. J. Christensen, Calibration of the TOPEX altimeter using a GPS buoy, J. Geophys. Res., 99, 24517–24526, 1994.

    Article  Google Scholar 

  2. Colombo, O., Long-distance kinematic GPS, Chapter 13, in GPS for Geodesy (2nd edition), edited by P. J. G. Teunissen and A. Kleusberg, pp. 537–567, Springer, 1996.

  3. Gonzalez, F. I., E. N. Bernard, H. B. Milburn, and H. O. Mofjeld, Early detection and real-time reporting of deep-ocean tsunamis, Abstracts of IUGG99 in Birmingham, B.127, 1999.

  4. Hino, R., T. Kanazawa, S. Sakai, Y. Tanioka, and K. Suyehiro, Tsunamis from an off-Sanriku and the Papua New Guinea earthquakes observed by ocean bottom tsunami measurement, Programme and Abstracts The Seismological Society of Japan, 1998, Fall Meeting P23, 1998 (in Japanese).

  5. Kato, T., Y. Terada, M. Kinoshita, H. Isshiki, and A. Yokoyama, GPS Tsunami-kei no kaihatsu, Gekkan Kaiyo, Special Vol. 15, 38–42, 1998 (in Japanese).

    Google Scholar 

  6. Kelecy, T. M., G. H. Born, M. E. Parke, and C. Rocken, Precise mean sea-level measurements using the Global Positioning System, J. Geophys. Res., 99, 7951–7959, 1994.

    Article  Google Scholar 

  7. Nagai, T., Okiai harou kansoku network ni yoru tsunami hakei kansoku, Gekkan Kaiyo, Special Vol. 15, 1998 (in Japanese).

  8. Tsujii, T., M. Harigae, and M. Murata, The development of kinematic GPS software, KINGS, and its application to observations of the crustal movements in the Izu-islands area, J. Geod. Soc. Japan, 43(2), 91–105, 1997 (in Japanese with English abstract).

    Google Scholar 

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Correspondence to Teruyuki Kato.

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Kato, T., Terada, Y., Kinoshita, M. et al. Real-time observation of tsunami by RTK-GPS. Earth Planet Sp 52, 841–845 (2000). https://doi.org/10.1186/BF03352292

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  • DOI: https://doi.org/10.1186/BF03352292

Keywords

  • Wind Wave
  • Ocean Tide
  • Ocean Bottom Pressure
  • Tsunami Data
  • Tsunami Observation