...J. F. Gettrust; V. Hsu; C. E. Helsley; E. Herrero; T. Jordan abstract Local seismic activity ( M > 2.3) during the 4 1 2 -day period preceding the Petatlan earthquake of 14 March 1979 ( M s = 7.6) was monitored by a seismic network deployed by the Hawaii Institute of Geophysics. These data allow...

..., was originally conceived as a RC waffle-flat slab structural system and was built in the late sixties. The building suffered important structural damage during the March 14, 1979 Petatlán Earthquake, primarily caused by structural pounding with neighboring structures due to its flexibility and resonant response...

...M. Mahdyiar; S. K. Singh; R. P. Meyer Abstract Assigning moment magnitude to local earthquakes based on peak recorded amplitude and hypocentral distance is the principal concern of this paper. For 38 aftershocks of the Petatlan earthquake (14 March 1979) with moments between 2.8 × 10 18 and 1.4...

... asperities located southeast of the Michoacan segment were ruptured first by the 1979 Petatlan event. The 1981 Playa Azul event ruptured two asperities in the central zone with a stress drop higher than 80 bars. The largest 1985 Michoacan earthquake resulted from the rupture of two large-size, strong...

...David A. Novelo-Casanova; Vindell Hsu; Eduard Berg; Charles E. Helsley; Joseph F. Gettrust Abstract Aftershocks of the 14 March 1979, Petatlan, Mexico, earthquake ( M S = 7.6) were recorded by a temporary seismic network deployed by the Hawaii Institute of Geophysics. This paper describes...

.... (1981) . Patterns of local seismicity preceding the Petatlan earthquake of 14 March 1979 , Bull. Seism. Soc. Am. 71 , 761 - 769 . Gutenberg B. Richter C. F. (1954...

.... Herrero E. Jordan T. (1981) . Patterns of local seismicity preceding the Petatlan earthquake of March 14, 1979 , Bull. Seism. Soc. Am. 71 , 761 - 769 . Havskov J...

.... Helsley C. E. Herrero E. Jordan T. (1981) . Patterns of local seismicity preceding the Petatlan earthquake of 14 March 1979 , Bull. Seism. Soc. Am. 71 , 761...

.... (1980) . A first report on the Petatlán, Guerrero, México earthquake of 14 March, 1979 , Geophys. Res. Letters 7 , 97 - 100 . Rautian T. G. Khalturin V. I. (1978) . The use...

... T. (1981) . Patterns of local seismicity preceeding the Petatlan earthquake of March 14, 1979 , Bull. Seism. Soc. Am. 71 , 761 - 769 . Goodstein J. R. Kanamori H...

.... (1983) . Local seismicity preceding the March 14, 1979, Petatlan, Mexico earthquake ( Ms = 7.6) , J. Geophys. Res. 88 , 4247 - 4262 . Huerta C. (1985) . Analisis de Ondas P Registrada en la Region Norte de la Peninsula de Baja...

... reliable and complete by us. Seismic gaps. Seismic gaps along the Mexican subduction zone have been studied by Kelleher et al. (1973) and McCann et al. (1979). Recent earthquakes of Colima (30 January 1973, M s = 7.5), Oaxaca (29 November 1978, M s = 7.8), and Petatlan (14 March 1979, M s = 7.6) have...

... of Earthquake Date (yyyy/mm/dd) Number of Asperity Depth (km) Stress Drop (MPa) 1 Petatlán 1979/03/14 1 11.685 0.558 2 29.830 0.504 2 Playa Azul 1981/10/25 1 16.330 3.049 3 Michoacán 1985/09/19 1 15.247 1.577 2 18.610 1.442 4 Zihuatanejo 1985/09/21 1 20.005...

.... (1984) . Aftershock activity of the Petatlan earthquake: the first 54 hours , Bull. Seism. Soc. Am. 74 , 2451 - 2461 . Rowlett H. Forsyth D. W. (1984) . Recent faulting...

... and Geophones as a Function of Ocean Depths 1649 Gettrust, J. F., V. Hsu, C. E. Helsley, E. Herrero, and T. J o r d a n - - P a t t e r n s of Local Seismicity Preceding the Petatlan Earthquake of 14 March 1979 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 761 Ghana 1977-1980, Earthquake...

.... (1980) . A first report on the Petatlan, Guerrero, Mexico earthquake of 14 March 1979 , Geophys. Res. Letters 7 , 97 - 100 . Okal E. A. (1976) . A surface-wave investigation of the rupture mechanism of the Gobi-Altai (4...

... structure in the source region. The average stress drop for the 82 earthquakes with magnitudes from 3 to 7 is 150 bars. The spatial distribution of the stress drops shows a distinctive pattern. At the northwest end of the Guerrero gap, adjacent to the aftershock zones of large earthquakes in 1979 and 1985...

..., by Yoshihiko Ogata and Kunihiko Shimazaki 1757 Aftershock Activity of the Petatlan Earthquake: The First 54 Hours, by David A. Novelo- Casanova, Vindell Hsu, Eduard Berg, Charles E. Helsley, and Joseph F. Gettrust 2451 Aki, K. and N. N. Biswas--Characteristics of Coda Waves: Central and Southcentral Alaska...

... anomaly noted for the Ometepec-San Marcos region, no similar anomaly has been noted as yet for the central Guerrero gap (McNally, 1981). 9. Petatlan: 101° to 101.8°W. Previous shocks in this region include: 22 February 1943, Ms 7.7 and 14 March 1979, Ms 7.6. In contrast to the Oaxaca earthquakes...

.... Valdez C. Yamamoto J. (1980) . A first report on the Petatlan, Guerrero, Mexico earthquake of 14 March 1979 , Geophys. Res. Lett. 7 , 97 - 100 . Nábêlek J...