Description
AFB4.5
Fullband Borehole Seismometer – fixed/gimbaled
The 6-components AFB4.5 is a deep borehole sonde for use in all types of earthquake studies. Combining a low power, High Sensitivity optical accelerometer and a standard 4.5 Hz seismometer, it covers the full earthquake and rapid ground-deformation spectrum. The AFB4.5 is designed for up to 1500 m depths in boreholes with tilts up to 15°. The gimbaled 3-C 4.5 Hz sensor adds an additional level of redundancy as well as high frequency response.
Advanced Features
➤ coverage of the full earthquake spectrum
➤ combination of active and passive sensors
➤ high tilt tolerance of up to 15°
➤ for permanent or temporary installations
Application and Deployment
➤ On scale, 20 s to 1200 Hz bandpass, local-to-regional, M~0 to ~4, with backup 4.5 Hz seismometer
➤ Local and regional networks in up to 1500 m deep, <15° tilted, boreholes spaced 5 to 10 km apart
➤ Improves detection by 2 units of magnitude over surface nets, detecting/locating all M > ~ -0.5 EQs
➤ Special applications include 4 to 8 station borehole and mine networks for stimulation monitoring
Dimensions
Outer diameter
Height
Weight
Power requirement
61 mm
1127 mm
10 kg
6-25 V DC
Find the Calibration Sheet using your Instrument Serial Number
The 6-components AFB4.5 is a deep borehole sonde for use in all types of earthquake studies. Combining a low power, High Sensitivity optical accelerometer and a standard 4.5 Hz seismometer, it covers the full earthquake and rapid ground-deformation spectrum. The AFB4.5 is designed for up to 1500 m depths in boreholes with tilts up to 15°. The gimbaled 3-C 4.5 Hz sensor adds an additional level of redundancy as well as high frequency response.
➤ coverage of the full earthquake spectrum
➤ combination of active and passive sensors
➤ high tilt tolerance of up to 15°
➤ for permanent or temporary installations
➤ combination of active and passive sensors
➤ high tilt tolerance of up to 15°
➤ for permanent or temporary installations
➤ On scale, 20 s to 1200 Hz bandpass, local-to-regional, M~0 to ~4, with backup 4.5 Hz seismometer
➤ Local and regional networks in up to 1500 m deep, <15° tilted, boreholes spaced 5 to 10 km apart
➤ Improves detection by 2 units of magnitude over surface nets, detecting/locating all M > ~ -0.5 EQs
➤ Special applications include 4 to 8 station borehole and mine networks for stimulation monitoring
➤ Local and regional networks in up to 1500 m deep, <15° tilted, boreholes spaced 5 to 10 km apart
➤ Improves detection by 2 units of magnitude over surface nets, detecting/locating all M > ~ -0.5 EQs
➤ Special applications include 4 to 8 station borehole and mine networks for stimulation monitoring
Outer diameter
Height
Weight
Power requirement
Height
Weight
Power requirement
61 mm
1127 mm
10 kg
6-25 V DC
1127 mm
10 kg
6-25 V DC