The intermediate earthquake of June 24, 1935*

1936 ◽  
Vol 26 (3) ◽  
pp. 195-196
Author(s):  
Victor J. Blum
Keyword(s):  
Intermediate Earthquake

scholarly journals A procedure for source studies from spectrums of long-period seismic body waves

1965 ◽  
Vol 55 (2) ◽  
pp. 203-235 ◽  
Author(s):  
Ari Ben-Menahem ◽  
Stewart W. Smith ◽  
Ta-Liang Teng
Keyword(s):  
Body Wave ◽  
Source Parameters ◽  
Wave Theory ◽  
Body Waves ◽  
Spectral Window ◽  
Earthquake Sources ◽  
Source Studies ◽  
New Ideas ◽  
Intermediate Earthquake ◽  
Set Up

Abstract The well-known first motion method of Nakano and Byerly is extended, generalized and combined with recent new ideas in body wave theory in order to set up a routine procedure for extracting source parameters from spectral analysis of isolated P and S pulses recorded at a net of standardized stations around a non-shallow source. The method consists of compensating the observed spectrums for instrumental and propagational effects. A combined study of the resulting radiation patterns, initial phases, and the initial amplitudes will render information regarding the spatial and temporal nature of deep and intermediate earthquake sources as seen through the spectral window of 10-100 seconds. The shorter periods can be used for source studies only if an accurate station correction is available.

The intermediate earthquake source near Bucaramanga, Colombia

1970 ◽  
Vol 60 (1) ◽  
pp. 269-276 ◽  
Author(s):  
Eysteinn Tryggvason ◽  
James Edwards Lawson
Keyword(s):  
Point Source ◽  
Seismic Source ◽  
Earthquake Source ◽  
Intermediate Depth ◽  
Intermediate Earthquake ◽  
Large Earthquakes ◽  
Frequency Magnitude

abstract An intensive source of intermediate depth earthquakes has been located in northern Colombia. The activity of this source increased significantly between 1956 and 1966, but appears to be decreasing after 1966. The frequency-magnitude relation of the Bucaramanga earthquakes is anomalous, with fewer large earthquakes than expected. The distribution of determined hypocenters is the same as would be observed if all earthquakes originated in the same point source. Therefore it is concluded that the Bucaramanga seismic source consists of a volume, less than 10 km in radius, centered at 6.8°N, 73.1°W., and 150 km depth.

Amplitude domain analysis for the 30 August 1986 Vrancea intermediate earthquake

1990 ◽  
Vol 3 (3) ◽  
pp. 305-314
Author(s):  
Lumini?a Ardeleanu ◽  
Victoria Oancea
Keyword(s):  
Domain Analysis ◽  
Intermediate Earthquake
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