Source Characteristics and Propagation Effects of the Puebla, Mexico, Earthquake of 15 June 1999

Yamamoto, J.; Quintanar, Luis; Rebollar, Cecilio J.; Jiménez, Z.

doi:10.1785/0120010117

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…Figure 9 compares the combined area of asperities (A a ) and seismic moment from the 1949 earthquake (Table 2) with those obtained using similar procedures and methods for two other Puget Sound earthquakes (Ichinose et al, 2004). We included measurements from several Japanese (Asano et al, 2003;Morikawa and Sasatani, 2004) and Mexico intraslab earthquakes (Hernandez et al, 2001;Iglesias et al, 2002;Yamamoto et al, 2002;García et al, 2004). These are compared with A a values from global crustal earthquakes (Somerville et al, 1999).…”

Section: Intraslab Source-scaling Relationsmentioning

confidence: 99%

Moment Tensor and Rupture Model for the 1949 Olympia, Washington, Earthquake and Scaling Relations for Cascadia and Global Intraslab Earthquakes

Ichinose¹,

Thio²,

Somerville³

2006

Bulletin of the Seismological Society of America

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We reanalyzed the 13 April 1949 Olympia, Washington, earthquake by using digitized records and first-motion polarities from long-period seismograms. The moment-tensor mechanism is normal faulting with a down-dip-trending T axis similar in style to other Cascadia intraslab earthquakes. The total seismic moment is 1.3 ‫ן‬ 10 26 dyne cm (M w 6.7) and the hypocenter depth is 60 km. Additional inverse modeling for the kinematic rupture process assuming the steeply east-dipping fault plane from the moment tensor resulted in a slightly higher total moment of 1.9 ‫ן‬ 10 26 dyne cm (M w 6.8). The earthquake ruptured to the south with at least two subevents. The combined area of asperities and seismic moment for the 1949 earthquake was compiled with those from the 1965 Seattle-Tacoma and the 2001 Nisqually earthquakes and with those from Japan and Mexico to develop a source-scaling relation separate from shallow global strike-slip earthquakes. We infer that deeper intraslab earthquakes have a significantly smaller combined area of asperities than those compiled for shallower strike-slip earthquakes with the same seismic moment. This difference in rupture area leads to a 3-to 5-fold increase in stress drop for earthquakes with seismic moments between 10 24 and 10 28 dyne cm.

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Section: Intraslab Source-scaling Relationsmentioning

confidence: 99%

Moment Tensor and Rupture Model for the 1949 Olympia, Washington, Earthquake and Scaling Relations for Cascadia and Global Intraslab Earthquakes

Ichinose¹,

Thio²,

Somerville³

2006

Bulletin of the Seismological Society of America

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“…Two large earthquakes were recorded by our network, the Puebla earthquake on 15 June 1999 M w = 7.0 [ Yamamoto et al , 2002] and the Oaxaca earthquake on 30 September 1999 M w = 7.5. The Puebla earthquake is out of the area of influence of our network; however, the Oaxaca earthquake lies inside our network, and we were able to locate its aftershocks.…”

Section: Event Locations and Vp/vs Estimatementioning

confidence: 99%

Geometry and state of stress of the Wadati‐Benioff zone in the Gulf of Tehuantepec, Mexico

Bravo¹,

Rebollar

Uribe³

et al. 2004

J. Geophys. Res.

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[1] Data recorded in the Gulf of Tehuantepec and published moment tensor solutions were used to infer the geometry of the Wadati-Benioff zone (W-B zone) and the stress distribution of the subducted Cocos Plate. From northwest to southeast the subducted slab gently increases its dip, bends up at depths of the order of 100 km and about 240 km inland from the trench, then unbends and increases its dip toward the southeast below Chiapas. Contour lines of equal depth at 50 and 100 km show a significant contortion of the W-B zone west of the Isthmus of Tehuantepec and coincide with significant changes in the topographic features of the crust. We calculated a V p /V s ratio of 1.75 for the whole area and a Moho depth in the Gulf of Tehuantepec of 28.5 ± 3.5 km. Near the trench, along the coupling zone, T axes of interplate and intraplate earthquakes are oblique to the interface and parallel to the dip direction of the subducted plate, respectively. At depths greater than 50 km the T axes are roughly horizontal. Best fit stresses using the Gephart and Forsyth [1984] code resulted in the following variation of the minimum stresses (T axes) from northwest to southeast as (plunge, azimuth) s 3 (40°, 37°) to s 3 (28°, 72°), then to s 3 (11°, 54°) and finally to s 3 (27°, 35°). We also analyzed recordings from the 30 September 1999, Oaxaca earthquake M w = 7.5 and its aftershocks. We inferred an approximate fault area of 80 by 30 km inside the subducted Cocos Plate.

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“…cities and towns of the state of Veracruz (Singh and Wyss, 1976); (3) 1980 M w 7.0 earthquake destructive to the city of Huajuapan de León in the state of Oaxaca (Yamamoto et al, 1984); and (4) 1999 M w 6.9 earthquake that caused damage to the city of Tehuacán and the states of Puebla and Morelos (Singh et al, 1999;Yamamoto et al, 2002). The recent, great intraslab earthquake of 8 September 2017 (M w 8.2), which occurred off the coast of Chiapas and Oaxaca, caused widespread destruction to the coastal towns of these states.…”

Section: Introductionmentioning

confidence: 99%

Deadly Intraslab Mexico Earthquake of 19 September 2017 (Mw 7.1): Ground Motion and Damage Pattern in Mexico City

Singh

Reinoso

Arroyo

et al. 2018

Seismological Research Letters

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In the wake of death and destruction left by the 2017 earthquake in Mexico City, it is natural to ask whether the event was unexpected and anomalous. Although such an intraslab earthquake (M w 7.1; depth 57 km; epicentral distance = 114 km from the city) was considered likely, the recordings in the city during the last 54 yrs reveal that the ground motion during the 2017 earthquake was anomalously large in the critical frequency range to the city (0.4-1 Hz). The intraslab earthquakes occur closer to Mexico City, at greater depth, and involve higher stress drop than their interplate counterparts. Consequently, the ground motion is relatively enriched at high frequencies as compared with that during interplate earthquakes, which is dominated by lower frequency waves (f < 0:5 Hz). This explains the observed difference in the damage pattern during the 2017 and the disastrous interplate earthquake of 1985 (M w 8.0). Electronic Supplement: Figures showing spectral ratios, peak ground acceleration (PGA) and peak ground velocity (PGV) as function of distance R, comparison of observed response spectra SA, and predicted median and 1 s SA from a site-specific ground-motion prediction equation (GMPE) model at CU, plot of accelerograms, Fourier acceleration spectra, and SA at SCT of interplate 1985 M w 8.0 and intraslab 2017 M w 7.1 earthquakes, accelerographic stations in Mexico City, which recorded the 2017 M w 7.1 earthquake, SA of the 2017 earthquake at sites in and near Condesa and Roma colonies, and basis for the estimation of exceedance rate of PGA at CU in Mexico City from intraslab earthquakes, and tables providing a list of 20 (interplate and intraslab) earthquakes with largest recorded PGA at CU in the 1964-2017 period, significant pre-1975 intraslab earthquakes, and a comparison of observed PGA and PGV at CU during the 2017 M w 7.1 earthquake with predictions from GMPE.

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Source Characteristics and Propagation Effects of the Puebla, Mexico, Earthquake of 15 June 1999

Cited by 13 publications

References 21 publications

Moment Tensor and Rupture Model for the 1949 Olympia, Washington, Earthquake and Scaling Relations for Cascadia and Global Intraslab Earthquakes

Moment Tensor and Rupture Model for the 1949 Olympia, Washington, Earthquake and Scaling Relations for Cascadia and Global Intraslab Earthquakes

Geometry and state of stress of the Wadati‐Benioff zone in the Gulf of Tehuantepec, Mexico

Deadly Intraslab Mexico Earthquake of 19 September 2017 (Mw 7.1): Ground Motion and Damage Pattern in Mexico City

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