WU JIAYI, CAO XUEFENG. 1987: QUANTITATIVE STUDIES OF GLOBAL SEISMICITY(1)--TEMPORAL VARIATIONS OF GLOBAL SHALLOW AND DEEP SEISMIC ACTIVITY. Acta Seismologica Sinica, 9(1): 1-14.
Citation: WU JIAYI, CAO XUEFENG. 1987: QUANTITATIVE STUDIES OF GLOBAL SEISMICITY(1)--TEMPORAL VARIATIONS OF GLOBAL SHALLOW AND DEEP SEISMIC ACTIVITY. Acta Seismologica Sinica, 9(1): 1-14.

QUANTITATIVE STUDIES OF GLOBAL SEISMICITY(1)--TEMPORAL VARIATIONS OF GLOBAL SHALLOW AND DEEP SEISMIC ACTIVITY

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  • Published Date: September 01, 2011
  • The authors previously introduced a parameter A(b) to describe the level of seismic activity. It is named seismicity index. In this paper, A(b) is used to show the temporal variation of global seismicity by assigning an index number to each year up to the beginning of the 20th century. The magnitude data in catalogues of global earthquakes prepared by Duda and Abe were used to calculate the seismicity index. It has been found that the seismicity level derived from Duda's data is much higher than that derived from Abe's, especially for the time interval 1964-1977. The authors thought that it would be better to choose the Abe's catalogue as the principal basis to conduct the calculation.The secular variation of A(b) in the 20th century is a slow decrease with short period fluctuations. Maybe the variation belongs to a descending branch of a long-term periodic variation, which has a period of hundreds of years. The most dominant feature of A(b) of global shallow earthquakes is that there was a sudden drop of A(b) in the time interval of 1952-1955, and this kind of sudden drop of A(b) for deep and intermediate earthquakes happened in 1950-1952. The variations of shallow and deep (including intermediate) seismicity are nearly synchronous before the 1950-1955 sudden drops, and after that time interval the variation tendencies appear to be opposite and complementary to each other. This phenomenon may probably lead to the supposition that the earthquake potential energy storage controls the seismicity pattern from the earth's interior.
  • [1] De Ballore, Montessus, La Geographie Séismologique, Paris, 1906.

    [2] Byerly, P., Seismicity of the northern Pacific coast of the United States, BGSA, 51, 255——260, 1940.

    [3] Byerly, P., Seismology, New York, 85——87, 1942.

    [4] Bath, M., Seismicity of Fennoscandia and related problems, Gerl. Beiar, zar Geophys., 63, 173, 1953.

    [5] Gutenberg, B. and C. F. Richter, Seismicity of the earth and associated phenomena, Princeton Univ. Press,1954.

    [6] Benioff, H., Global strain accumulation and release as revealed by great earthquakes, BGSA, 62, 331——338, 1951.

    [7] Duda, S. J., Secular seismic energy release in the circum——Pacific belt, Tecaoreophys., 2, 409——452, 1965.

    [8] Bath, M, and S. J. Duda, Some aspects of global seismicity, Seism. Inst. Rep. No. 1——79, Uppsala, 1979.

    [9] Geller, R. J. and H. Kanamori, Magnitudes of great shallow earthquakes from 1904 to 1952, Budl. Seirm.Soc. Am., 67, 587——598, 1977.

    [10] Abe, K. and H. Kanamori, Temporal variation of the activity of intermediate and deep focus earthquakes,J. Ceophys. Res., 84, B7, X589——3595, 1979.

    [11] Kanamori, H. and K. Abe, Reevaluation of the turn——of——the——century seismicity peak, J. Geophys. Res., 84,6131——6139, 1979.

    [12] Abe, K. and H. Kanamori, Magnitudes of great shallow earthquakes from 1953 to 1977, Tectonophys., 82,191——203, 1980.

    [13] Abe, K., Magnitudes of large shallow earthquakes from 1904 to 1980. Phys. Earth Plaaet. Int., 27. 72——92, 1981.

    [14] Abe, K. and Sh. Noguchi, Determination of magnitudes for large shallow earthquakes 1898——1917, Phys.Earth Planet. Inz., 32, 45——59, 1983.

    [15] Abe, K. and Sh. Noguchi, Revision of magnitudes of large shallow earthquakes, 1897——1912, Phys. Earth Planet. Int., 33, 1——11, 1983.

    [16] Magi, K., Active periods in the world's chief seismic belts, Tectonophyr., 22, 265——282, 1974.

    [17] Mogi, K,Global variation of seismic activity, Tectonophys., 57, T43——T50, 1979.

    [18] 吴佳翼、曹学锋,地震活动性的定量化问题,地震,1983, 6: 13——22,

    [19] Gutenberg, B., Great earthquakes 1896——1903, Trans. Am. Geophys. Uni, 37, 6b8——614, 1956.

    [20] Abe, K., Complements to "Magnitudes of large shallow earthquakes from 1904 to 1980", Phys. Sarah Planet.Int., 34, 17——23, 1984.

    [21] 高旭、刘滨兴,全球地震活动与宇宙环境的关系,地震,1981, 3: 2——4,

    [22] Myerson, R. J., Evidence for association of earthquakes with the Chandler wobble, using long term polar data of the ILS——IPMS, in 《Mansinha, L. et al. (ed.), Earthquake displacement fields and the rotation of the earth》, 1970.

    [1] De Ballore, Montessus, La Geographie Séismologique, Paris, 1906.

    [2] Byerly, P., Seismicity of the northern Pacific coast of the United States, BGSA, 51, 255——260, 1940.

    [3] Byerly, P., Seismology, New York, 85——87, 1942.

    [4] Bath, M., Seismicity of Fennoscandia and related problems, Gerl. Beiar, zar Geophys., 63, 173, 1953.

    [5] Gutenberg, B. and C. F. Richter, Seismicity of the earth and associated phenomena, Princeton Univ. Press,1954.

    [6] Benioff, H., Global strain accumulation and release as revealed by great earthquakes, BGSA, 62, 331——338, 1951.

    [7] Duda, S. J., Secular seismic energy release in the circum——Pacific belt, Tecaoreophys., 2, 409——452, 1965.

    [8] Bath, M, and S. J. Duda, Some aspects of global seismicity, Seism. Inst. Rep. No. 1——79, Uppsala, 1979.

    [9] Geller, R. J. and H. Kanamori, Magnitudes of great shallow earthquakes from 1904 to 1952, Budl. Seirm.Soc. Am., 67, 587——598, 1977.

    [10] Abe, K. and H. Kanamori, Temporal variation of the activity of intermediate and deep focus earthquakes,J. Ceophys. Res., 84, B7, X589——3595, 1979.

    [11] Kanamori, H. and K. Abe, Reevaluation of the turn——of——the——century seismicity peak, J. Geophys. Res., 84,6131——6139, 1979.

    [12] Abe, K. and H. Kanamori, Magnitudes of great shallow earthquakes from 1953 to 1977, Tectonophys., 82,191——203, 1980.

    [13] Abe, K., Magnitudes of large shallow earthquakes from 1904 to 1980. Phys. Earth Plaaet. Int., 27. 72——92, 1981.

    [14] Abe, K. and Sh. Noguchi, Determination of magnitudes for large shallow earthquakes 1898——1917, Phys.Earth Planet. Inz., 32, 45——59, 1983.

    [15] Abe, K. and Sh. Noguchi, Revision of magnitudes of large shallow earthquakes, 1897——1912, Phys. Earth Planet. Int., 33, 1——11, 1983.

    [16] Magi, K., Active periods in the world's chief seismic belts, Tectonophyr., 22, 265——282, 1974.

    [17] Mogi, K,Global variation of seismic activity, Tectonophys., 57, T43——T50, 1979.

    [18] 吴佳翼、曹学锋,地震活动性的定量化问题,地震,1983, 6: 13——22,

    [19] Gutenberg, B., Great earthquakes 1896——1903, Trans. Am. Geophys. Uni, 37, 6b8——614, 1956.

    [20] Abe, K., Complements to "Magnitudes of large shallow earthquakes from 1904 to 1980", Phys. Sarah Planet.Int., 34, 17——23, 1984.

    [21] 高旭、刘滨兴,全球地震活动与宇宙环境的关系,地震,1981, 3: 2——4,

    [22] Myerson, R. J., Evidence for association of earthquakes with the Chandler wobble, using long term polar data of the ILS——IPMS, in 《Mansinha, L. et al. (ed.), Earthquake displacement fields and the rotation of the earth》, 1970.
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