GFZ German research centre for geo sciences

URSEIS '95

URSEIS '95 explosive

URSEIS '95 Vibroseis:

General information
Recorded
June-November 1995
by
Spetsgeofisika, Moscow, Russia
for
GFZ Potsdam, Germany
Area
Southern Urals
Profile length
510 km => 465 km crooked line
Total data amount
30.7 Gigabyte
Recording
Recording System
Input/Output-Two
Sample rate
4 ms
Number of channels
360
Field filter
no low cut, no notch, antialias 70Hz/191 dB
Noise Reduction
burst-edit + diversity stack
Correlation
with filtered sweep
Recording Format
SEGD, cartridge 3480
Recording Time
25 s 
Receivers
Geophone type
10 Hz, vertical
Geophones/Group
12 fold
Receiver array
In-line, 50 m
Group spacing
50 m
No. of geophone points
 
Spread length
18000 m
Sources
Source type
Vibroseis
Number of vibrators
5
Sweep length
30 s 
Sweep range
10 - 64 Hz, linear
Recording Configuration
symmetrical split-spread
9000 m-VP-9000 m, no gap
Source spacing
100/150 m
Number of source points
3326
Pattern length
 
Vertical stacking rate
10 fold
CMP's
Coverage (theor./real) 
60-90 fold
CMP-spacing
 
Number of CMP's
 


URSEIS '95 explosive:

General information
Recorded
June-November 1995
by
Spetsgeofisika, Moscow, Russia
for
GFZ Potsdam, Germany
Area
Southern Urals
Profile length
371 km -> 335 km crooked line
Total data amount
8 Gigabyte
Recording
Recording System
Input/Output-Two
Sample rate
4 ms
Number of channels
360
Field filter
no low cut, no notch, antialias 70 Hz/191 dB
Recording Format
SEGD, cartridge 3480
Recording Time
65 s
Receivers
Geophone type
10 Hz, vertical
Geophones/Group
12 fold
Receiver array
In-line, 50 m
Group spacing
60 m
No. of geophone points
 
Spread length
18000 m
Sources
Source type
explosive
Charge/shot
80 kg
No. of shot holes/shot
Depth of shot hole
25-30 m 
Tamping
 
Recording Configuration
Vibroseis spread was used for off-end shooting
Source spacing
3 km
Number of source points
337
CMP's
Coverage (theor./real) 
6 fold
CMP-spacing
 
Number of CMP's
 
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