b-value, an Alert in Different Seismic Regions of Iran

Document Type : Original Article

Authors

1 Geotechnics, Civil, Engineering, Zanjan university, Iran

2 Geotechnics, Civil, Engineering, Zanjan University, Iran

Abstract

Although Earthquake prediction studies are being widely considered their findings are uncertain and criticized regarding problem complexity and scientific content. Therefore; based on the robust analysis, the detailed investigation can be of great value. The recent triggered events in Iran reveal that this country is under pressure and contemporary tectonic stress pattern of the region changes. This motivates researchers to explore its different aspects. In this research, statistical analysis is made on the records listed in International Institution of Earthquake Engineering and Seismology (IIEES) catalog and b-value of the Gutenberg-Richter Relationship was computed. The time-dependent values of being can act as a stress accumulation indicator in a region. Therefore, Iran was subdivided into 29 zones and b-value was explored in every zone between the years 2010 and 2017. The results are in a proper agreement with the seismic regime of the regions wherein earthquakes occurred recently. Furthermore, an interesting hazard map was resulted in, introducing the regions with accumulating stresses therefore, being susceptible for experiencing future events. 

Keywords


1- Li, M., Wei, Z., 1983, Gravity variation before and after Tangshan earthquake, Tectonophysics, 97, 158.
2- Eftaxias, K., Kapiris, P., Dologlou, E., Kopanas, J., Bogris, N., Antonopoulos, G., Peratzakis, A., Hadjicontis, V., 2002, EM anomalies before the Kozani earthquake: A study of their behavior through laboratory experiment, Geophysics Research Letter, 29(8), 10.1029/2001GL013786.
3- Arabelos, D., Asteriadis, G., Contadakis, M., Zioutas, G., Xu, D., Zhang, C., Zheng, B., 2001, The use of an outlier detecting method in time series of continuous daily measurements of underground water level and temperature in earthquake prediction investigation, Tectonophysics, 338, 315-323.
4- Kopylova, G.N., Boldina, S.V., Smirnov, A.A., Chubarova, E.G., 2017, Experience in registration of variations caused by strong earthquakes in the level and physicochemical parameters of ground waters in the piezometric wells: the case of Kamchatka, Seismic Instruments. 53(4), 286-295.
5- Contadakis, M. E., Asteriadis, G., 2001, Recent results of the research for preseismic phenomena on the underground water and temperature in Pieria, northern Greece, Natural Hazards and Earth System Science, 1, 165-170.
6- Lu, J., Qian, F., Zhao, Y., 1999, Sensitivity analysis of the Schlumberger monitoring array: application to changes of resistivity prior to the 1976 earthquake in Tangshan, China, Tectonophysics, 307, 397-405.
7- Zhao, Y., Qian, F., 1994, Geoelectric precursors to strong earthquakes in China, Tectonophysics, 233(1–2), 99–113.
8- Asim, K.M., Martinez-Alvarez, F., Basit, A., lqbal, T., 2017, Earthquake magnitude prediction in Hindukush region using machine learning techniques, Natural Hazards, 85, 471-486.
9- Sammonds, P.R., Meredith, P.G., Main, I. G., 1992, Role of pore fluid in the generation of seismic precursors to shear fracture, Nature, 359, 228-230.
10- Gutenberg, B., Richter, C.F., 1944, Frequency of earthquake in California, Bulletin of Seismology Society of America, 34(4), 185 – 188.
11- Scholz, C. H., 1968, the frequency-magnitude relation of micro-fracturing in rock and its relation to earthquakes, Bulletin of Seismology Society of America, 58, 399-415.
12- Bufe, C. G., 1970, Frequency-magnitude variations during the 1970 Danville earthquake swarm, Earthquake Notes, 41, 3-6.
13- Schorlemmer, D., Wiemer, S., Wyss, M., 2005, Variations in earthquake-size distribution across different stress regimes, Nature international journal of science, 437, 539-542.
14- Nuannin, P., Kulhanek, Ota., Persson, Leif., 2005, Spatial and temporal b-value anomalies preceding the devastating off coast of NW Sumatra earthquake of December 26-2004, Geophysics Researches Letter, 32, L11307.
15- Molchan. G. M., Dmitrieve, O., 1990, Dynamics of magnitude-frequency relation of foreshocks, Physics Earth Planet International, 61, 99-112.
16- Monterroso, D., 2003, Statistical seismology studies in Central America: b-value, seismic hazard and seismic quiescence, Compr. Summaries Uppsala Diss. Fac. Sci. Technol. 897, 27 pp., Acta Univ. Upsaliensis, Uppsala, Sweden.
17- Wiemer, S., Wyss, M., 1997, Mapping the frequency-magnitude distribution in asperities: An improved technique to calculate recurrence times, Journal of Geophysics Research, 102, 15,115-15,128.
18- Jackson, J., McKenzie D., 1984, Active tectonics of the Alpine–Himalayan Belt between western Turkey and Pakistan, Geophysical Journal International, Vol 77(1):pp 185-264.
19- Berberian, M., 1986, Seismotectonics and earthquake-fault hazard study of the Karkheh Dams and River Project,  Jahad-e-Sazandegi, International Report, Tehran, 180p. (In Persian).
20- James, G. A., and Wynd, J. G., 1965, Stratigraphic Nomenclature of Iranian Oil Consortium Agreement Area, AAPG Bulletin, 49, 2182-2245.
21- Koop, W. and Stoneley, R., 1982, Subsidence History of the Middle East Zagros Basin, Permian to Recent, Philosophical Transactions of the Royal Society A, A305, 149-168.
22- Berberian, M., 2005, The 2003 Bam urban earthquake: A predictable seismotectonic pattern along the western margin of the rigid Lut block southeast Iran, Earthquake Spectra, 21(S1), 35-99.
23- Mouthereau, F., Tensi, J., Bellahsen, N., Lacombe, O., De Boisgrollier, T., Kargar, S., 2007b, Tertiary sequence of deformation in a thin-skinned/thick-skinned collision belt: The Zagros Folded Belt (Fars, Iran), Tectonics. 26, 1-28.
24- Mogi, K., 1967, Regional variation in magnitude-frequency relation of earthquake, Bulletin of Earthquake Research, 45, 313-325.
25- Kanamori,  H., 1981,  The  nature  of  seismic  patterns  before  large  earthquakes.  In Earthquake Prediction:  An International Review (Maurice Ewing Series), Vol.4, AGU, Washington D.C., 1-19.
26- Aki, K., 1965, Maximum likelihood estimate of b in the formula logN=a-bM and its confidence limits, Bulletin Earthquake Research, 43, 237-239.
27- Wossener, J., Wiemer, S., 2005, Assesing the quality of earthquake catalogues: estimating the magnitude of completeness and its uncertainty, Bulletin of Seismology Society of America, 95(2), 684-698.
28- Nava, F. A., Marquez-Ramirez, V. H., Zuniga F. R., Avila-Barrientos, L., Quinteros C.B., 2017, Gutenberg-Richter b-value maximum likelihood estimation and sample size, Journal of Seismology. 21, 127-135.
29- Shi, Y., Bolt, B. A., 1982, The standard error of the magnitude-frequency b-value, Bulletin of Seismology Society of America, 72, 1677-1687.
30- Jafari, M. A., 2008, The distribution of b-value in different seismic provinces of Iran, The 14th world conference on earthquake engineering, Beijing. China.
31- Earthquake Catalog, 2010, IIEES, Retrieved from http://www.iiees.ac.ir/fa/recentevents.