Inversion of Explosive Source Land Seismic Data to Determine Source Parameters

2021 ◽  
Author(s):  
A. Ziolkowski
Keyword(s):  
Seismic Data ◽  
Source Parameters ◽  
Explosive Source

Source parameters of the 1908 Messina Straits, Italy, earthquake from geodetic and seismic data

2002 ◽  
Vol 107 (B4) ◽  
pp. ESE 4-1-ESE 4-11 ◽  
Author(s):  
Antonella Amoruso ◽  
Luca Crescentini ◽  
Roberto Scarpa
Keyword(s):  
Seismic Data ◽  
Source Parameters

EXAMPLES OF THE EFFECT OF SOURCE AND RECORDING SITE PARAMETERS ON THE SEISMIC RESPONSE OBSERVED FROM PLOWSHARE PROJECTS, GASBUGGY AND RULISON

Geophysics ◽  
1972 ◽  
Vol 37 (2) ◽  
pp. 288-300 ◽  
Author(s):  
Walter W. Hays
Keyword(s):  
Seismic Data ◽  
Spectral Response ◽  
Source Parameters ◽  
Sedimentary Basins ◽  
Test Site ◽  
Physical Parameters ◽  
Recording Site ◽  
Matrix Formulation ◽  
Surface Particle ◽  
Depth Of Burial

The amplitude and frequency composition of the seismic motions observed over a wide geographic area from Gasbuggy and Rulison, two Plowshare detonations, illustrates the effect which source and recording site parameters have on the resultant ground motion. Gasbuggy (29 kt) and Rulison (40 kt) were detonated, respectively, in the San Juan and Piceance Creek sedimentary basins of New Mexico and Colorado. Because both detonations were emplaced in sedimentary formations to stimulate the flow of natural gas, these detonations were placed at a greater depth of burial than typically required for containment. The effect of source parameters (device depth of burial and energy release) was simulated by seismic scaling theory. This theory (based on an extension of Sharpe’s problem) predicted a smaller elastic radius and, consequently, higher dominant frequency of generation for the elastic waves than would be expected on the basis of Nevada Test Site experience with typically contained events of 29 and 40 kt. Observed effects of the source variables were displayed in the Gasbuggy and Rulison seismic data: (1) a shift of the frequency of maximum spectral response to the high frequency end of the spectrum and (2) enhancement of the peak vector surface particle accelerations and velocities and a decrease in the peak vector surface particle displacements. Some of the Rulison recording sites were located on thin (50 ft thick or less) layers of alluvium which, on the basis of refraction surveys, exhibited a fairly significant contrast in acoustic impedance relative to that of the underlying sedimentary rocks. The effect of the lowvelocity alluvium layers at recording sites of interest was simulated by amplitude amplification modeling (based on the Haskell‐Thompson matrix formulation) using interpreted data from refraction surveys to define the layer physical parameters. These calculations indicated that significant local frequency‐dependent amplification would occur at some locations in the Piceance Creek Basin, a prediction which was verified by the seismic data.

Source parameters of the Ensenada Bay earthquake swarm, Baja California, Mexico

1985 ◽  
Vol 22 (1) ◽  
pp. 126-132 ◽  
Author(s):  
Cecilio J. Rebollar
Keyword(s):  
Seismic Data ◽  
Strain Energy ◽  
High Strain ◽  
Source Parameters ◽  
Earthquake Swarm ◽  
Ground Displacement ◽  
Source Dimensions ◽  
Fault Type ◽  
Stress Drops ◽  
High Strain Energy

Seismic data collected from the Ensenada Bay earthquake swarm of late 1981 were used to calculate the spectra of ground displacement. Data from the stations of Ensenada (ENX) and Cerro Bola (CBX), at epicentral distances of 14 and 57 km, respectively, were used to evaluate source parameters. The focal depths determined for these events were less than 10 km. The focal mechanism was a strike-slip fault type, with the plane of motion striking N52°W, parallel to the Agua Blanca Fault. Seismic moments ranging from 3.44 × 1019 to 5.99 × 1020 dyn∙cm (3.44 × 1014 to 5.99 × 1015 N∙cm) were estimated for events with local magnitudes in the range 1.7–2.3. The source dimensions were found to be 186 ± 36 m and the stress drops between 3 and 66 bar (0.3 and 6.6 MPa), comparable to results obtained in previous studies of shallow events (depths <10 km). The Ensenada swarm could be attributed to a localized zone of high-strain energy at the intersection of two faults. Ratios of P to S corner frequencies were evident for only five events; they were 1.39 ± 0.38. Magnitude and seismic moment from other studies were compared with the Ensenada data in the range of magnitudes 0–3. All the data can be accommodated by log M0 = 1.5 ML + (16.9 ± 1.1). The Ensenada earthquake swarm and the Victoria earthquake swarm, which occurred in the Mexicali valley in 1978, have similar source radii and corner frequencies for the same range of seismic moments.

Analysis and Application on Frequency-Response Charateristic Based on Multi-Elements in Near-Surface

2014 ◽  
Vol 490-491 ◽  
pp. 1548-1552
Author(s):  
Zhi Xin Di
Keyword(s):  
Surface Layer ◽  
Seismic Data ◽  
Yellow River ◽  
Source Area ◽  
Yellow River Delta ◽  
Single Shot ◽  
Near Surface ◽  
Explosive Source ◽  
Layer Velocity

With the continuously process of prospecting program, our land exploration enter into activity lithostratigrapgy stage. For searching medium and small or subtle reservior, higher seismic data discernibility must be needed. In the explosive source area, surface layer velocity, shot lithology and ghost interface are the three key elements influencing the shot frequency. In view of the trait that the quality of single shot has apparently difference causing by near surface layer Yellow River Delta multiple lithology alternating deposits, we study the characteristics of frequency reponse to lithology and ghost by microseismogram log data, to provide reliable basis for scientific select shooting parameter.

Seismic yield estimates from Rayleigh-wave source radiation pattern

1981 ◽  
Vol 71 (4) ◽  
pp. 1269-1286
Author(s):  
Nazieh K. Yacoub
Keyword(s):  
Rayleigh Wave ◽  
Radiation Pattern ◽  
Epicentral Distance ◽  
Source Parameters ◽  
Spectral Amplitude ◽  
Attenuation Coefficients ◽  
Wave Source ◽  
Source Radiation ◽  
Explosive Source ◽  
Double Couple

abstract Rayleigh-wave spectral amplitudes generated by two United States nuclear explosions, Rulison and Rio Blanco, were equalized to epicentral distance of 10°, corrected for geometric spreading and instrument response, and filtered by a narrow-band filter to obtain corrected spectral amplitudes. The corrected spectral amplitudes were used in a least-squares scheme to evaluate the symmetric source radiation pattern parameters and average attenuation coefficients, as functions of frequency. The parameters are: the explosive source; the F factor, which is the ratio of the double-couple source to the explosive source; and the radiation pattern azimuth. The evaluated average attenuation coefficients were used, with the station epicentral distance to adjust the corrected spectral amplitudes to obtain the source spectral amplitude, from which the spectral magnitudes were calculated. The explosive source parameters of the radiation pattern and the spectral magnitudes, at different frequencies, were used to estimate the yields of the above two explosions. The estimated yields for the two explosions are within 2 to 6 per cent of the announced yields. The best yield estimate was obtained from the explosive source parameters which estimated the yields for Rulison at 40.6 kt and Rio Blanco at 88.6 kt. The announced yields for Rulison and Rio Blanco are 40 and 90 kt, respectively.

Estimating the 2008 Quetame (Colombia) earthquake source parameters from seismic data and InSAR measurements

2016 ◽  
Vol 72 ◽  
pp. 250-265 ◽  
Author(s):  
Gabriel Dicelis ◽  
Marcelo Assumpção ◽  
James Kellogg ◽  
Patricia Pedraza ◽  
Fábio Dias
Keyword(s):  
Seismic Data ◽  
Source Parameters ◽  
Earthquake Source ◽  
Earthquake Source Parameters
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