- Open Access
Repeating short- and long-term slow slip events with deep tremor activity around the Bungo channel region, southwest Japan
Earth, Planets and Space volume 57, pages961–972(2005)
We report the repeating occurrence of short- and long-term slow slip events (SSE) which are accompanied by deep tremor activity around the Bungo channel region, southwest Japan. Both of these activities are detected by NIED Hi-net, which is composed of densely distributed observatories equipped with a set of tiltmeter and a high-sensitivity seismograph. Since the short-term SSE is small in magnitude, GPS can detect only the long-term SSE. Some of these episodes have nearly the same surface deformation pattern. This shows the existence of ‘slow slip patches’ on a plate interface, where the episodic slow slip is the characteristic slip behavior. We observe a change in periodicity and size of the short-term episode after the onset of the long-term SSE. Moreover, the long-term slow slip accelerates when the short-term activity takes place. This suggests that there is an interaction between these two types of SSEs.
Ando, M., Source mechanisms and tectonic significance of historical earthquakes along the Nankai trough, Japan, Tectonophys., 27, 119–140, 1975.
Baumberger, T., P. Berthoud, and C. Caroli, Physical analysis of the state- and rate-dependent friction law. II. Dynamic friction, Phys. Rev. B, 60, 3928–3939, 1999.
Brune, J. N., Tectonic stress and the spectra of seismic shear waves from earthquakes, J. Geophys. Res., 75, 4997–5009, 1970.
Dragert, H., K. Wang, and T. S. James, A silent slip event on the deeper Cascadia subduction interface, Science, 292, 1525–1528, 2001.
Hatanaka, Y., T. Iizuka, M. Sawada, A. Yamagiwa, Y. Kikuta, J. M. Johnson, and C. Rocken, Improvement of the analysis strategy of GEONET, Bull. Geogr. Surv. Inst., 49, 11–37, 2003.
Heki, K., Seasonal modulation of interseismic strain buildup in Northeastern Japan driven by snow loads, Science, 293, 89–92, 2001.
Heki, K., Dense GPS array as a new sensor of seasonal changes of surface loads, in The State of the Planet: Frontiers and Challenges in Geophysics, edited by R. S. J. Sparks and C. J. Hawkesworth, American Geophysical Union, Washington D. C., 2004.
Hirose, H., K. Hirahara, F. Kimata, N. Fujii, and S. Miyazaki, A slow thrust slip event following the two 1996 Hyuganada earthquakes beneath the Bungo Channel, southwest Japan, Geophys. Res. Lett., 26(21), 3237–3240, 1999.
Hirose, I., I. Kawasaki, Y. Okada, T. Sagiya, and Y. Tamura, A silent earthquake of December 9, 1989, in the Tokyo Bay, as revealed by the continuous observation of crustal movements in the southern Kanto district, central Japan, Zisin, 2nd ser, J. Seism. Soc. Jpn, 53, 11–23, 2000 (in Japanese with English abstract).
Hyndman, R. D., K. Wang, and M. Yamano, Thermal constraints on the seismogenic portion of the southwestern Japan subduction thrust, J. Geophys. Res., 100(B8), 15,373–15,392, 1995.
Kostoglodov, V., S. K. Singh, J. A. Santiago, S. I. Franco, K. M. Larson, A. R. Lowry, and R. Bilham, A large silent earthquake in the Guerrero seismic gap, Mexico, Geophys. Res. Lett., 30(15), doi:10.1029/2003GL017219, 2003.
Langbein, J. and H. Johnson, Correlated errors in geodetic time series: Implications for time-dependent deformation, J. Geophys. Res., 102, 591–603, 1997.
Lay, T. and H. Kanamori, An asperity model of large earthquake sequences, in Earthquake Prediction, edited by D. W. Simpson and P. G. Richards, 680 pp., American Geophysical Union, Washington D. C., 1981.
Lowry, A. R., K. M. Larson, V. Kostoglodov, and R. Bilham, Transient fault slip in Guerrero, southern Mexico, Geophys. Res. Lett., 28(19), 3753–3756, 2001.
Miller, M. M., T. Melbourne, D. J. Johnson, and W. Q. Sumner, Periodic slow earthquakes from the Cascadia subduction zone, Science, 295, 2423, 2002.
Miyazaki, S. and K. Heki, Crustal velocity field of southwest Japan: Subduction and arc-arc collision, J. Geophys. Res., 106(B3), 4305–4326, 2001.
Nadeau, R. M. and T. V. McEvilly, Fault slip rates at depth from recurrence intervals of repeating microearthquakes, Science, 285, 718–721, 1999.
Nagai, R., M. Kikuchi, and Y. Yamanaka, Comparative study on the source processes of recurrent large earthquakes in Sanriku-oki region: the 1968 Tokachi-oki earthquake and the 1994 Sanriku-oki earthquake, Zisin, 2nd ser., J. Seism. Soc. Jpn, 54, 267–280, 2001 (in Japanese with English abstract).
Nakamura, M., H. Watanabe, T. Konomi, S. Kimura, and K. Miura, Characteristic activities of subcrustal earthquakes along the outer zone of southwestern Japan, Annu. Disaster Prev. Res. Inst. Kyoto Univ., 40(B1), 1–20, 1997 (in Japanese with English abstract).
National Research Institute for Earth Science and Disaster Prevention (NIED), Viscosities of crustal rocks estimated from long-term continuous observation by Sakata-type three-component borehole strainmeters, Rep. Coord. Commit. Eq. Pred., 67, 138–146, 2002 (in Japanese).
Obara, K., Hi-net: High sensitivity seismograph network, Japan, Lecture Notes in Earth Sciences, 98, 79–87, 2002a.
Obara, K., Nonvolcanic deep tremor associated with subduction in southwest Japan, Science, 296, 1679–1681, 2002b.
Obara, K., Time sequence of deep low-frequency tremors in the southwest Japan subduction zone: Triggering phenomena and periodic activity, J. Geography, 112, 837–849, 2003 (in Japanese with English abstract).
Obara, K., H. Hirose, F. Yamamizu, and K. Kasahara, Episodic slow slip events accompanied by non-volcanic tremors in southwest Japan subduction zone, Geophys. Res. Lett., 31(23), L23602, doi:10.1029/2004GL020848, 2004.
Okada, Y., Internal deformation due to shear and tensile faults in a half-space, Bull. Seism. Soc. Am., 82, 1018–1040, 1992.
Okada, Y., K. Kasahara, S. Hori, K. Obara, S. Sekiguchi, H. Fujiwara, and A. Yamamoto, Recent progress of seismic observation networks in Japan—Hi-net, F-net, K-NET, and KiK-net, Earth Planets Space, 56, xv–xxviii, 2004.
Ozawa, S., M. Murakami, M. Kaidzu, T. Tada, T. Sagiya, Y. Hatanaka, H. Yarai, and T. Nishimura, Detection and monitoring of ongoing aseismic slip in the Tokai region, central Japan, Science, 298, 1009–1012, 2002.
Ozawa, S., S. Miyazaki, Y. Hatanaka, T. Imakiire, M. Kaidzu, and M. Murakami, Characteristic silent earthquakes in the eastern part of the Boso peninsula, Central Japan, Geophys. Res. Lett., 30(6), doi:10.1029/2002GL016665, 2003.
Ozawa, S., Y. Hatanaka, M. Kaidzu, M. Murakami, T. Imakiire, and Y. Ishigaki, Aseismic slip and low-frequency earthquakes in the Bungo channel, southwestern Japan, Geophys. Res. Lett., 31(7), doi:10.1029/2003GL019381, 2004.
Rogers, G. and H. Dragert, Episodic tremor and slip on the Cascadia subduction zone: The chatter of silent slip, Science, 300, 1942–1943, 2003.
Sato, H., H. Takahashi, E. Yamamoto, N. Fukuo, M. Uehara, and Y. Terasawa, Development of the crustal tilt observation method using borehole-type tiltmeters, Zisin, 2nd ser., J. Seism. Soc. Jpn, 33, 343-368, 1980 (in Japanese with English abstract).
Schwartz, D. P. and K. J. Coppersmith, Fault behavior and characteristic earthquakes: Examples from the Wasatch and San Andreas fault zones, J. Geophys. Res., 89(B7), 5681–5698, 1984.
Shiomi, K., K. Obara, S. Aoi, and K. Kasahara, Estimation on the azimuth of the Hi-net and KiK-net borehole seismometers, Zisin, 2nd ser., J. Seism. Soc. Jpn, 56, 99–110, 2003 (in Japanese).
Tamura, Y., T. Sato, M. Ooe, and M. Ishiguro, A procedure for tidal analysis with a Bayesian information criterion, Geophys. J. Int., 104, 507–516, 1991.
Yamanaka, Y. and M. Kikuchi, Asperity map along the subduction zone in northeastern Japan inferred from regional seismic data, J. Geophys. Res., 109, B07307, doi:10.1029/2003JB002683, 2004.
About this article
Cite this article
Hirose, H., Obara, K. Repeating short- and long-term slow slip events with deep tremor activity around the Bungo channel region, southwest Japan. Earth Planet Sp 57, 961–972 (2005) doi:10.1186/BF03351875
- Subduction zone
- Philippine Sea plate
- plate interface
- borehole tiltmeter
- slow slip patch