Validation of Intensity Attenuation Relationships

The aim of the present paper is to test intensity attenuation relationships for subcrustal earthquakes occurred in Vrancea (Romania) seismogenic zone in relation with some important dams situated in extra-Carpathian area. During centuries, the Romanian territory has been shaken by strong earthquakes, most of them being centered within Vrancea Zone, which is situated at the bending area of the South-Eastern Carpathians. Most of the zones from extra-Carpathian area are affected by the subcrustal seismic events, where many hydro-technical structures exist, being also exposed to earthquakes action. A detailed analysis of the intensity attenuation laws developed for subcrustal seismic sources was performed using the most recent and complete intensity datasets. We use an extended and combined intensity data including historical and modern, qualitative and quantitative data, i.e. a number of 11 earthquakes occurred during the period 1738-2009 with epicentral/maximum intensities ranging from VII-X MSK degrees, and magnitude Mw from 5.4 to 7.9. All the input data used for testing are resulted after the reevaluation and evaluation of the macroseismic effects produced by the seismic events included in the present study (8697 IDP). The selected attenuation laws were tested for different values of epicentral intensity and with reference to twelve and twenty four azimuthal directions. Besides the testing of the relationships, isoseismal maps based on the selected attenuation laws were accomplished, associated to the biggest possible earthquake (worst scenario) for the Vrancea subcrustal zone, also highlighting the calculated intensities in the selected dam sites. Brief description of the study and used methods. Brief description of the study and used methods.

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Magnitude–intensity and intensity–attenuation relationships for atlas region and Algerian earthquakes

Earthquake Engineering & Structural Dynamics ◽

10.1002/eqe.4290230703 ◽

1994 ◽

Vol 23 (7) ◽

pp. 717-727 ◽

Cited By ~ 5

Author(s):

D. Benouar

Keyword(s):

Intensity Attenuation ◽

Attenuation Relationships

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Magnitude-intensity and intensity-attenuation relationships for Atlas region and Algerian earthquakes

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(95)90022-5 ◽

1995 ◽

Vol 32 (1) ◽

pp. A3

Keyword(s):

Intensity Attenuation ◽

Attenuation Relationships

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Application of Backside Photo and Thermal Emission Microscopy Techniques to Advanced Memory Devices

ISTFA 1997: Conference Proceedings from the 23rd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa1997p0063 ◽

1997 ◽

Author(s):

S.-S. Lee ◽

J.-S. Seo ◽

N.-S. Cho ◽

S. Daniel

Keyword(s):

Thermal Emission ◽

Test Cases ◽

Memory Devices ◽

Front Side ◽

Emission Analysis ◽

Intensity Attenuation ◽

Analysis Techniques ◽

Defect Sites ◽

Emission Microscopy ◽

Microscopy Techniques

Abstract Both photo- and thermal emission analysis techniques are used from the backside of the die colocate defect sites. The technique is important in that process and package technologies have made front-side analysis difficult or impossible. Several test cases are documented. Intensity attenuation through the bulk of the silicon does not compromise the usefulness of the technique in most cases.

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ESTIMATION TO ATTENUATION RELATIONSHIPS OF TURBULENCE CAUSED BY MARINE STRUCTURES

Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering) ◽

10.2208/kaigan.74.i_1381 ◽

2018 ◽

Vol 74 (2) ◽

pp. I_1381-I_1386

Author(s):

Norihiro NISHIMURA ◽

Yoshiaki AIDA ◽

Takayuki NAKABAYASHI ◽

Masakazu USUI

Keyword(s):

Marine Structures ◽

Attenuation Relationships

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Attenuation relationships of peak ground motions in the Jazan Region

Arabian Journal of Geosciences ◽

10.1007/s12517-020-06442-z ◽

2021 ◽

Vol 14 (3) ◽

Author(s):

Ali K. Abdelfattah ◽

Abdullah Al-amri ◽

Kamal Abdelrahman ◽

Muhamed Fnais ◽

Saleh Qaysi

Keyword(s):

Saudi Arabia ◽

Ground Motions ◽

Prediction Equation ◽

Peak Ground Velocity ◽

Local Magnitude ◽

Ground Acceleration ◽

Data Set ◽

Hypocentral Distance ◽

Distance Range ◽

Attenuation Relationships

AbstractIn this study, attenuation relationships are proposed to more accurately predict ground motions in the southernmost part of the Arabian Shield in the Jazan Region of Saudi Arabia. A data set composed of 72 earthquakes, with normal to strike-slip focal mechanisms over a local magnitude range of 2.0–5.1 and a distance range of 5–200 km, was used to investigate the predictive attenuation relationship of the peak ground motion as a function of the hypocentral distance and local magnitude. To obtain the space parameters of the empirical relationships, non-linear regression was performed over a hypocentral distance range of 4–200 km. The means of 638 peak ground acceleration (PGA) and peak ground velocity (PGV) values calculated from the records of the horizontal components were used to derive the predictive relationships of the earthquake ground motions. The relationships accounted for the site-correlation coefficient but not for the earthquake source implications. The derived predictive attenuation relationships for PGV and PGA are$$ {\log}_{10}(PGV)=-1.05+0.65\cdotp {M}_L-0.66\cdotp {\log}_{10}(r)-0.04\cdotp r, $$ log 10 PGV = − 1.05 + 0.65 · M L − 0.66 · log 10 r − 0.04 · r , $$ {\log}_{10}(PGA)=-1.36+0.85\cdotp {M}_L-0.85\cdotp {\log}_{10}(r)-0.005\cdotp r, $$ log 10 PGA = − 1.36 + 0.85 · M L − 0.85 · log 10 r − 0.005 · r , respectively. These new relationships were compared to the grand-motion prediction equation published for western Saudi Arabia and indicate good agreement with the only data set of observed ground motions available for an ML 4.9 earthquake that occurred in 2014 in southwestern Saudi Arabia, implying that the developed relationship can be used to generate earthquake shaking maps within a few minutes of the event based on prior information on magnitudes and hypocentral distances taking into considerations the local site characteristics.

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