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24-channel with 24-bit dynamic range (most of today’s multichannel seismographs
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One with16-bit dynamic range may be acceptable. A laptop computer is usually necessary to control seismograph. A rugged toughbook is preferred.
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A 12-V small car or motorcycle battery with relatively low capacity (e.g., 4Ah)
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A dry-cell battery can also be used for several hours of acquisition.
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4.5-Hz Geophones (higher frequency geophones can also be used; e.g., 10-Hz, 14-Hz, 40-Hz, etc.)
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High-frequency geophones (e.g., 40 Hz) may be acceptable for relatively shallow investigation only (e.g., Zmax ≤ 10 m). A land streamer is strongly recommended for fastest acquisition.
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Sledge Hammer (≥ 8-lb) (for maximum investigation depth, Zmax, ≤ 30 m)
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A weight-drop source can further increase investigation depth; e.g., Zmax ≥ 30 m.
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Aluminum plate (e.g., 1 ft x 1 ft size with 1/2-in thickness)
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Softer plate (e.g., polyethylene) can improve energy at lower frequencies (therefore, Zmax).
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A separate geophone planted near the strike plate can also be used.
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Radio triggering system can also be used at the expense of higher cost.
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Any range in 4-8 ft takeout spacing may be acceptable.
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Trigger Extension Cable (e.g., 100 ft), Jumper Cable (e.g., 30 ft), Tape Measure (≥ 100 ft), Stake Flags, Black Tape, Ear Plugs, Gloves, Spray Paint, GPS, Safety Gears, etc.
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