El temblor de profundidad intermedia de Nicaragua del 15 de octubre de 1967(mb = 6.2) ¿temblor de baja caída de esfuerzos?
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El análisis espectral de onda P realizado en estaciones ubicadas a distancias telesísmicas, permitió la estimación de los parámetros de la fuente del temblor (mb= 6.2) de profundidad intermedia (h = 160 km), ocurrido el 15 de octubre de 1967 con epicentro vecino al volcán Masaya y cerca de la ciudad de Managua, Nicaragua (11.91 °N; 85.98°W). El momento sísmico determinado es de 2.4 x 1026 dinas-cm, el radio de ruptura de 29.0 km, la caída de esfuerzos de 4.3 bares, el esfuerzo aparente promedio de 1.4 bares y el deslizamiento promedio de 6.4 cm. La baja caída de esfuerzos encontrada sugiere la existencia de una región de baja resistencia a los esfuerzos de cizalle, dentro de la zona de Benioff a profundidades de 160 km. Esto pudiera ser resultado del calor generado por la ocurrencia frecuente de sismos de moderada magnitud a profundidad intermedia, por procesos de deshidratación y por las características térmicas heredadas desde la formación en la dorsal, de la relativamente joven placa litosférica de Cocos que alcanza la fosa Mesoamericana.
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ACHARYA, H., 1981. Volcanism and aseismic slip in subduction zones, J. Geophys. Res., 86, 335-344. DOI: https://doi.org/10.1029/JB086iB01p00335
AKI, K., 1967. Scaling law of seismic spectrum, J. Geophys. Res., 72, 1217-1231. DOI: https://doi.org/10.1029/JZ072i004p01217
BEN MENAHEM, A., S. W. SMITH y T. L. TENG, 1965. Procedure for source studies from spectrums of long period seismic waves, Bull. Seism. Soc. Am., 55, 203-235. DOI: https://doi.org/10.1785/BSSA0550020203
BERCKHEMER, H. y K. H. JACOB, 1968. Investigation of the dynamical process in earthquake foci by analysing the pulse shape of body waves, Berichte des Institutes für Meteorologie und Geophysik der Universitat Frankfurt/Mein, 85 p.
BESSONOVA, E. N., O. D. GOTSODEZE, V. I. KEYLIS-BOROK, I. V. KIRILLOVA, S. D. KOGAN, T. J. KIKHTIKOVA, L. N. MALINOVSKAYA, G. I. PAVLOVA y Q. A. SORSKII, 1960. Investigation of the mechanism of earthquakes, American Geophysical Union, 201 p.
BOLLINGER, G. A., 1968. Determination of earthquake fault parameters from long-period P waves, J. Geophys. Res., 73, 785-807. DOI: https://doi.org/10.1029/JB073i002p00785
BROWN, R. D. Jr., P. L. WARD y G. PLAFKER, 1973. Geologic and seismologic aspects of the Managua, Nicaragua, earthquake of December 23, 1972, U. S. Geol. Surv. Profess. Paper 838, 34 p. DOI: https://doi.org/10.3133/pp838
BRUNE, J. N., 1970. Tectonic stress and the spectra of seismic shear waves from earthquakes, J. Geophys. Res., 75, 4997-5009. DOI: https://doi.org/10.1029/JB075i026p04997
CARPENTER, E. W., P. D. MARSHALL y A. DOUGLAS, 1967. The amplitude-distance curve for short period teleseismic P-waves. Geophys. Journ., 13, 61-70. DOI: https://doi.org/10.1111/j.1365-246X.1967.tb02146.x
CARR, M. J. y R. E. STOIBER, 1973. Intermediate depth earthquakes and volcanic eruptions in Central America, 1961-1972, Bull. Vole., 37, 326-337. DOI: https://doi.org/10.1007/BF02597632
CARR, M. J. y R. E. STOIBER, 1977. Geologic setting of some destructive earthquakes in Central America, Geol. Soc. Am. Bull., 88, 151-156. DOI: https://doi.org/10.1130/0016-7606(1977)88<151:GSOSDE>2.0.CO;2
COUDERT, E., B. L. ISACKS, M. BARAZANGI, R. LOUAT, R. CARDWELL, A. CHEN, J. DUBOIS, G. LATHAM y B. PONTOIDE, 1982. Spatial distribution and mechanism of earthquakes in the Southern New Hebrides arc from a temporary land and ocean seismic network and from worldwide observations, J. Geophys. Res., 86, 5905-5925. DOI: https://doi.org/10.1029/JB086iB07p05905
DEAN, H. W. y C. L. DRAKE, 1978. Focal mechanism solutions and tectonics of the Middle America Arc, J. Geology, 86, 111-128. DOI: https://doi.org/10.1086/649659
DEWEY, J. W. y B. R. JULIAN, 1976. Main event source parameters from teleseismic data. The Guatemala earthquake of February 4, 1976, a preliminary report. U.S. Geol. Surv. Profess. Paper 1002, 19-23.
DEWEY, J. W. y S. T. ALGERMISSEN, 1974. Seismicity of the Middle America Arc-Trench system near Managua, Nicaragua, Bull. Seism. Soc. Am., 64, 1033-1048. DOI: https://doi.org/10.1785/BSSA0640041033
FUJITA, K. y H. KANAMORI, 1981. Double seismic zones and stresses of intermediate depth earthquakes, Geophys. J. R. Astr. Soc., 66, 131-156. DOI: https://doi.org/10.1111/j.1365-246X.1981.tb05950.x
GUTENBERG, B. y C. F. RICHTER, 1956. Magnitude and energy of earthquakes, Ann. Geofísica, 9, 1-15. DOI: https://doi.org/10.4401/ag-5590
GRIGGS, D. T., 1972. The sinking lithosphere and the focal mechanism of deep earthquakes, in The Nature of Solid Earth, ed. by. E. C. Robertson, J. F. Hays and L. Knopoff, 361-384.
HANKS, T. C., 1977. Earthquake stress drops, ambient tectonic stresses and stresses that drive plate motions, Pure Appl. Geophys., 115, 441-458. DOI: https://doi.org/10.1007/978-3-0348-5745-1_28
HANKS, T. C. y M. WYSS, 1972. The use of body wave spectra in the determination of seismic-source parameters, Bull. Seism. Soc. Am., 62, 561-589. DOI: https://doi.org/10.1785/BSSA0620020561
HASKELL, N. A., 1953. The dispersion of surface waves on multilayered media, Bull. Seism. Soc. Am., 43, 17-34. DOI: https://doi.org/10.1785/BSSA0430010017
HEY, R., G. L. JOHNSON y A. LOWRIE, 1977. Recent plate motions in the Galápagos area. Geol. Soc. Am. Bull., 88, 1385-1403. DOI: https://doi.org/10.1130/0016-7606(1977)88<1385:RPMITG>2.0.CO;2
HUENE, R. von, J. AUBOUIN, J. AZEMA, G. BLACKINTON, J. A. CARTER, W. T. COULBOURN, D.S. COWAN, J. A. CURIALE, C. A. DENGO, R. W. FAAS, W. HARRISON, R. HESSE, D. M. HUSSONG, J. W. LAAD, N. MUZYLOV, T. SHIKI, P. R. THOMPSON y J. WESTBERG, 1980. Leg 67: the deep sea drilling project Middle America Trench transect off Guatemala, Geol. Soc. Am. Bull., 91, 421432. DOI: https://doi.org/10.1130/0016-7606(1980)91<421:LTDSDP>2.0.CO;2
ISACKS, B. L. y M. BARAZANGI, 1977. Geometry of Benioff zones: lateral segmentation and downwards bending of the subducted lithosphere, in Island Arcs, Deep Sea Trenches and Back-arc Basins, Maurice Ewing Ser:, V. 1, edited by M. Talwani y W. C. Pitmann III, 94-114. DOI: https://doi.org/10.1029/ME001p0099
ISACKS, B. L. y P. MOLNAR, 1969. Mantle earthquake mechanism and the sinking of the lithosphere, Nature, 223, 1121-1124. DOI: https://doi.org/10.1038/2231121a0
ISACKS, B. L. y P. MOLNAR, 1971. Distribution of stresses in the descending lithosphere from a global survey of focal mechanism solutions of mantle earthquakes, Rev. Geophys. Space Phys., 9, 103-174. DOI: https://doi.org/10.1029/RG009i001p00103
JULIAN, B. R. y D. L. ANDERSON, 1968. Travel times, apparent velocities and amplitudes of body waves, Bull. Seism. Soc. Am., 58, 339-366. DOI: https://doi.org/10.1785/BSSA0580010339
KANAMORI, H., 1977. Seismic and Aseismic slip along subduction zones and their tectonic implications, in Islands Arcs, Deep Sea Trenchs and Back Arc Basins, Maurice Ewing Sr., V. 1, edited by M. Talwani y W. C. Pitmann III, 163-174. DOI: https://doi.org/10.1029/ME001p0163
KANAMORI, H. y D. L. ANDERSON, 1975. Theoretical basis of some empirical relations in Seismology, Bull. Seism. Soc. Am., 65, 1073-1095.
McNALLY, K. C. y J. B. MINSTER, 1981. Nonuniform seismic slip rates along the Middle-America Trench, J. Geophys. Res., 86, 4949-4959. DOI: https://doi.org/10.1029/JB086iB06p04949
MOLNAR, P. y L. R. SYKES, 1969. Tectonics of the Caribbean and Middle America regions from focal mechanisms and seismicity, Geol. Soc. Am. Bull., 89, 1639-1684. DOI: https://doi.org/10.1130/0016-7606(1969)80[1639:TOTCAM]2.0.CO;2
MOLNAR, P., 0. GRIEDMANN y J. S. T. SHIH, 1979. Lengths of intermediate and deep seismic zones and temperatures in downgoing slabs of lithosphere, Geoph. J. R. Astron. Soc., 56, 41-54. DOI: https://doi.org/10.1111/j.1365-246X.1979.tb04766.x
MONTERO, W., 1977. Determinación de algunos parámetros focales para 9 temblores fuertes (mb ≥ 5.4) ocurridos en Costa Rica y alrededores: Implicaciones geofísicas. Tesis de Maestría en Ciencias, Universidad Nacional Autonoma de México, 219 p.
MONTERO, W. y L. PONCE, 1979. Localización hipocentral y mecanismo focal de algunos temblores fuertes de Costa Rica-Nicaragua, Geofísica Internacional, 18, 411-428. DOI: https://doi.org/10.22201/igeof.00167169p.1979.18.4.972
PHINNEY, R. A., 1964. Structure of the earth's crust from spectral behavior of long-period body waves, J. Geophys. Res., 69, 2997-3017. DOI: https://doi.org/10.1029/JZ069i014p02997
REYNERS, M. y K. S. COLES, 1982. Fine structure of the dipping seismic zone and subduction mechanisms in the Shumogin Islands, Alaska, J. Geophys. Res., 87, 356-366. DOI: https://doi.org/10.1029/JB087iB01p00356
SINGH, S. K., y M. WYSS, 1976. Source parameters of the Orizaba Earthquake of August 28, 1973, Geofísica Internacional, 16, 165-184. DOI: https://doi.org/10.22201/igeof.00167169p.1976.16.3.1119
STOIBER, R. E. y M. J. CARR, 1973. Quaternary volcanism and tectonic segmentation of Central America, Bull. Vulc., 37, 304-324. DOI: https://doi.org/10.1007/BF02597631
SUGIMURA, A. y S. UYEDA, 1976. Islands arcs, Japan and its environs, 247 pp., Elsevier, New York.
SYKES, L. R. y M. L. SBAR, 1973. Intraplate earthquakes, lithospheric stresses and the driving mechanism of plate tectonics, Nature, 245, 298-302. DOI: https://doi.org/10.1038/245298a0
TURCOTTE, D. L. y G. SCHUBERT, 1973. Frictional heating of the descending lithosphere, J. Geophys. Res., 78, 5876-5886. DOI: https://doi.org/10.1029/JB078i026p05876
VLAAR, N. J. y M. J. R. WORTEL, 1976. Lithospheric aging, instability and subduction, Techtonophysics, 32, 331-351. DOI: https://doi.org/10.1016/0040-1951(76)90068-8
WYSS, M. y J. N. BRUNE, 1968. Seismic moment, stress and source dimensions for earthquakes in the California-Nevada region, J. Geophys. Res., 73, 4681-4694. DOI: https://doi.org/10.1029/JB073i014p04681
WYSS, M. y L. J. SHAMEY, 1975. Source dimensions of two deep earthquakes estimated from aftershocks and spectra, Bull. Seism. Soc. Am., 65, 403-409. DOI: https://doi.org/10.1785/BSSA0650020403