Seismic hazard assessment under complex source size distribution of mining-induced seismicity

2008 ◽  
Vol 456 (1-2) ◽  
pp. 28-37 ◽  
Author(s):  
Stanislaw Lasocki ◽  
Beata Orlecka-Sikora
Keyword(s):  
Seismic Hazard ◽  
Size Distribution ◽  
Hazard Assessment ◽  
Induced Seismicity ◽  
Seismic Hazard Assessment ◽  
Source Size ◽  
Mining Induced Seismicity ◽  
Complex Source

Magnitude distribution complexity and variation at The Geysers geothermal field

2020 ◽  
Vol 222 (2) ◽  
pp. 893-906
Author(s):  
Konstantinos Leptokaropoulos
Keyword(s):  
Seismic Hazard ◽  
Size Distribution ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
B Value ◽  
Geothermal Field ◽  
Earthquake Magnitude ◽  
Fluid Injection ◽  
Magnitude Distribution ◽  
The Geysers

SUMMARY Earthquake magnitude (size) distribution is a major component required for seismic hazard assessment and therefore, the accurate determination of its functional shape and variation is a task of utmost importance. Although often considered as stationary, the magnitude distribution at particular sites may significantly vary over time and space. In this study, the well-known Gutenberg–Richter (GR) law, which is widely assumed to describe earthquake magnitude distribution, is tested for a case study of seismicity induced by fluid injection at The Geysers (CA, USA) geothermal field. Statistical tests are developed and applied in order to characterize the magnitude distribution of a high quality catalogue comprising seismicity directly associated with two injection wells, at the north western part of The Geysers. The events size distribution variation is investigated with respect to spatial, temporal, fluid injection and magnitude cut-off criteria. A thorough spatio-temporal analysis is performed for defining seismicity Clusters demonstrating characteristic magnitude distributions which significantly differ from the ones of the nearby Clusters. The magnitude distributions of the entire seismic population as well as of the individual Clusters are tested for their complexity in terms of exponentiality, multimodal and multibump structure. Then, the Clusters identified are further processed and their characteristics are determined in connection to injection rate fluctuations. The results of the analysis clearly indicate that the entire magnitude distribution is definitely complex and non-exponential, whereas subsequent periods demonstrating significantly diverse magnitude distributions are identified. The regional seismicity population is divided into three major families, for one of which exponentiality of magnitude distribution is clearly rejected, whereas for the other two the GR law b-value is directly proportional to fluid injection. In addition, the b-values of these Families seem to be significantly magnitude dependent, a fact that is of major importance for seismic hazard assessment implementations. To conclude, it is strongly suggested that magnitude exponentiality must be tested before proceeding to any b-value calculations, particularly in anthropogenic seismicity cases where complex and time changeable processes take place.

Probabilistic seismic hazard assessment for the main cities along the continental section of the Cameroon volcanic line

2021 ◽  
Vol 14 (9) ◽  
Author(s):  
Etoundi Delair Dieudonné Ndibi ◽  
Eddy Ferdinand Mbossi ◽  
Nguet Pauline Wokwenmendam ◽  
Bekoa Ateba ◽  
Théophile Ndougsa-Mbarga
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Probabilistic Seismic Hazard Assessment ◽  
Probabilistic Seismic Hazard ◽  
Cameroon Volcanic Line

Probabilistic Seismic-Hazard Assessment in Quito, Estimates and Uncertainties

2014 ◽  
Vol 85 (6) ◽  
pp. 1316-1327 ◽  
Author(s):  
C. Beauval ◽  
H. Yepes ◽  
L. Audin ◽  
A. Alvarado ◽  
J.-M. Nocquet ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Probabilistic Seismic Hazard Assessment ◽  
Probabilistic Seismic Hazard

Seismic hazard assessment using intensity point data

1994 ◽  
Vol 13 (3) ◽  
pp. 219-226 ◽  
Author(s):  
G. Monachesi ◽  
L. Peruzza ◽  
D. Slejko ◽  
M. Stucchi
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Point Data

scholarly journals Preliminary Seismic Hazard Assessment of the Oral and Dental Hospital of Jenderal Soedirman University Indonesia

2017 ◽  
Vol 171 ◽  
pp. 1025-1034 ◽  
Author(s):  
Yanuar Haryanto ◽  
Gathot Heri Sudibyo ◽  
Fransisca Cynthia Angelina Effendi
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Dental Hospital
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