scholarly journals Radiated seismic energy and earthquake source duration variations from teleseismic source time functions for shallow subduction zone thrust earthquakes

2004 ◽  
Vol 109 (B9) ◽  
pp. n/a-n/a ◽  
Author(s):  
S. L. Bilek ◽  
T. Lay ◽  
L. J. Ruff
Keyword(s):  
Subduction Zone ◽  
Seismic Energy ◽  
Earthquake Source ◽  
Radiated Seismic Energy ◽  
Shallow Subduction ◽  
Source Duration

Spatial Distribution of Radiated Seismic Energy of Three Aftershocks Sequences at Guerrero, Mexico, Subduction Zone

2019 ◽  
Vol 109 (6) ◽  
pp. 2556-2566 ◽  
Author(s):  
Raymundo Plata‐Martínez ◽  
Xyoli Pérez‐Campos ◽  
Shri Krishna Singh
Keyword(s):  
Subduction Zone ◽  
Seismic Moment ◽  
Seismic Energy ◽  
Mean Value ◽  
Seismic Gap ◽  
Radiated Seismic Energy ◽  
Northern Edge ◽  
Southern Border ◽  
The Mean ◽  
Rupture Behavior

Abstract General characteristics of seismic energy release of thrust earthquakes in Mexico have been reviewed in the past; however, a detailed analysis can contribute to a better understanding of the mechanisms that control its distribution along the Guerrero, Mexico, subduction zone. To address it, we obtain the source spectra of the 2012 Mw 7.5 Ometepec‐Pinotepa Nacional, the 2014 Mw 7.2 Papanoa, and the 2018 Mw 7.2 Pinotepa Nacional earthquakes, as well as of their M≥4.0 aftershocks to estimate their seismic moment M0 and radiated seismic energy ES. The first and the last sequences occurred at the southern border of the Guerrero seismic gap, a region where no significant earthquake (M>7.0) has occurred at least in the last century; whereas the second sequence was located at the northern edge of the same seismic gap. The mean value of the log of radiated seismic energy scaled with the seismic moment, log(e˜)=log(ES/M0), for this set of earthquakes is −5.05±0.25. We classify the analyzed events into four regions, two in the southern edge of the gap and two in the northern one. At both ends, there is one region that shows regular values of log(e˜) (−4.64±0.25 and −4.62±0.25), whereas the other one shows low values of log(e˜) (−5.40±0.25 and −5.55±0.25) that could be related to a possible slow‐rupture behavior. These last regions are identified near the trench at southern Guerrero coast and immediately outside the northern end of the seismic gap. The distribution of log(e˜) is spatially heterogeneous along the trench, suggesting variations on the shear strength and coupling at the interface.

Resolution and uncertainties in estimates of earthquake stress drop and energy release

2021 ◽  
Vol 379 (2196) ◽  
pp. 20200131 ◽  
Author(s):  
Rachel E. Abercrombie
Keyword(s):  
Stress Drop ◽  
Source Parameters ◽  
Seismic Energy ◽  
Earthquake Source ◽  
Quality Of Data ◽  
Fracture Dynamics ◽  
Radiated Seismic Energy ◽  
Earthquake Source Parameters ◽  
Source Models ◽  
As Stress

Our models and understanding of the dynamics of earthquake rupture are based largely on estimates of earthquake source parameters, such as stress drop and radiated seismic energy. Unfortunately, the measurements, especially those of small and moderate-sized earthquakes (magnitude less than about 5 or 6), are not well resolved, containing significant random and potentially systematic uncertainties. The aim of this review is to provide a context in which to understand the challenges involved in estimating these measurements, and to assess the quality and reliability of reported measurements of earthquake source parameters. I also discuss some of the ways progress is being made towards more reliable parameter measurements. At present, whether the earthquake source is entirely self-similar, or not, and which factors and processes control the physics of the rupture remains, at least in the author's opinion, largely unconstrained. Detailed analysis of the best recorded earthquakes, using the increasing quantity and quality of data available, and methods less dependent on simplistic source models is one approach that may help provide better constraints. This article is part of the theme issue ‘Fracture dynamics of solid materials: from particles to the globe’.

Radiated seismic energy of earthquakes in the south–central region of the Gulf of California, Mexico

2018 ◽  
Vol 214 (2) ◽  
pp. 990-1003
Author(s):  
Raúl R Castro ◽  
Antonio Mendoza-Camberos ◽  
Arturo Pérez-Vertti
Keyword(s):  
Central Region ◽  
Gulf Of California ◽  
Seismic Energy ◽  
The South ◽  
Radiated Seismic Energy ◽  
South Central
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