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Earthscope
PC-Based Seismograph


Now record what you feel on your computer...
Earthscope is a popular PC-based seismograph. This low-cost device is perfect for seismic applications where precise timing is not required. The device is used in schools and homes throughout the world. It is able to detect a magnitude 4.3 at a distance of 250 miles, so now you can record and display those local earthquakes you see on the news!

Two features allow you see and track earthquakes:
Drum Display Mode Earthquake Analysis mode
  • Real time display of data as it is collected
  • Menu-driven control of data acquisition and display parameters
  • Event-triggered or continuous storage of data to disk
  • Display previously recorded earthquakes
  • Zoom in or out
  • Compute magnitude and range of earthquakes
  • Analyze frequency spectrum of data

Approximate Earthquake Detection Threshold
At an Average Ground Quality
Magnitude
Range
2.4
2.6
3.2
3.8
4.3
50 km (31 miles)
100 km (62 miles)
200 km (128 miles)
300 km (186 miles)
400 km (248 miles)

Minimum Detectable Signal
Frequency (Hz)
Ground Velocity (mm/s*)
1
2
4.5
1.54
0.376
0.076

Specifications
Analog Motion Sensor
Sensitive axis:
Vertical
Responsivity:
1000 V/m/s Normal Gain
Bandwidth:
1 to 30 Hz
(Low and high frequency options available)
Analog to Digital D S Converter
14 channels
Sample rate:
128 Hz standard
Dynamic range:
111 dB
Anti-alias filter:
4 pole active

Computer Requirements

  • PC, 386/20 MHz or better
  • 1 free COM port
  • 2 MB or more free disk space
  • Mouse recommended
  • Complete custom software supplied

Installation

  • Vertical sensor within 8° of vertical
  • Cable length: 4 meters
  • Connects directly the COM port, with no card installation required

Cost

    $495 plus shipping and handling

Ordering

    Please call Seismo-Watch Headquarters during regular business hours (West Coast time), Monday-Friday at

1-888-221-8585

    and have your credit card ready.
    Shipping is 2-4 weeks, depending on availability.
    Rush orders available, purchase order accepted, prepayment required.

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