| Index..
SEISMIC SURVEY EQUIPMENT
Explosive and Impact sources
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Betsy seisgun (1) with plastic splatter guard, shell holder(2), hammer(3) and shells of various sizes
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Shooting with the Betsy downhole seismic source The spool of cable connects to the seismograph and sends the 0-second start time to the recording
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Power Hammer 0.22 caliber seismic plate impact source
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Vibroseis Trucks (not at LSU)
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USGS Mini-Sosie Impact hammer Study in California (USGS)
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Accelerated Weight Drop (Digipulse)
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Hammer blow to Aluminum plate
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Marine Sources
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Bolt 600-series air guns with 20 cubic-inch chambers (Coastal Studies Institute)
High-resolution SCS seismic source |
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Directivity of RV M. Ewing Airgun Array (Columbia University)
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Watergun from R/V Joides Resolution
ODP Leg 188- Prydz Bay Antarctica (ODP program) |
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GI gun
Collapsing bubble is injected with additional gas to prevent ringing (US NSF R/V Ice Breaker NBPalmer) |
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Bolt airgun (NSF R/V Palmer, 2003)
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GI gun deployment
Ross Sea, Antarctica, Feb. 2003 |
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Receivers
How
Geophones work by T. Boyd
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P-wave phone
Vertical 10-Hz geophone |
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High-frequency vertical P-geophone
Long 7-inch spike is for marsh work |
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Geophone cross-section
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Land Cables
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Seismic analog cable
Takeout and Amphib 122 connector |
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Roll-along Switch
RLS-120 Texas Instruments |
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Land streamer- sleds coupled to ground carry geophones
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Marine Cables
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SCS layout
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MCS streamer layout NBP0301A
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ITI singel-channel streamer
Hydrophones- Ross Sea Feb. 2003 |
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Digital and Analog Recorders
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Marine or Land Seismograph
24-channel 24-bit A-D seismic recorder |
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Marine and Land Seismograph
OYO DAS-1- (not at LSU) |
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Flat-bed burnt paper recorder
Analog academic 1-2 channel recorder |
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3-D Land radiotelemetry acquisition system
OpseisSercel Eagle88 electronics
WesternGECO donation 2003 |
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Strataview R24 in Field |
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Shothole drilling
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Drilling shotholes
3-foot deep shotholes for Betsy shallow seismic gun |
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Drill for shallow shot holes
Portable 300-lb 8-hp drilling auger |
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Marine Transport
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Antarctic Ice Breaker Nathaniel B Palmer
US NSF marine geology and geophysics vessel |
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Commercial WesternGECO Seismic Boat "Trident"
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Transition and Land Transport
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Airboat
GPS survey in coastal marsh zone
(not at LSU) |
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ATV 6x6 amphibious Buffalo truck can carry 1000 lb
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Positioning
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Digital Theodolite
Surveying Precise Elevation |
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GPS unit 3-4 m horizontal accuracy
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