Featured Station
A36M
Sachs Harbour, NT, CAN
Sensors
A seismometer is a very sensitive instrument that can detect movements of Earth's surface. The surface is in constant motion due to natural and man-made phenomena. For example, the solid Earth tide is caused by the gravitational pull of the moon stretching Earth. Tucson slowly rises and falls twice a day about 40 cm due to the moon orbiting overhead. Mining explosions are a source of seismic energy. Ambient seismic noise amplitude is measured in nanometers, and can have a frequency bandwidth from 10s of Hz to days.
Very-Broadband Seismometer
- Flat to velocity 1s - 100 Hz response
- Dynamic range > 90 db
- 2000 V/m/s sensitivity
- Output 20 V peak-to-peak
- No mass locking required
- Power consumption = 38 Ma at 12 V DC
- Weight = 2.49 Kg
- Case diameter = 154 mm
- Case height = 207 mm
- Operating Temperature = -10 to + 75 deg C
- Manufacturer link
High-Frequency Seismometer
Geospace GS11D
- Natural Frequency 4.5 Hz
- Coil resistance = 380 Ohms
- Sensitivity = 0.32 V/cm/sec
- Damping with 380 Ohm coil = 762
- Moving mass = 23.6 g
- Height = 3.35 cm
- Diameter = 3.18 cm
- Weight = 111 g
- Manufacturer link
Strong-Motion Sensor
Kinemetrics Episensor ES-T

- Dynamic Range > 155 Db
- Bandwidth DC to 200 Hz
- User selectable full-scale range +- 0.25 g, +-0.5 g, =+-1 g, +-2 g, or +-4 g
- Power consumption = 35 mA (Low Noise aAmp) @ 12 V DC
- Operating Temperature = -20 deg C to 70 deg C
- Physical size = 13.3 cm; diameter = 6.2 cm height