Category: Technical

BOREHOLE SEISMOMETERS: WHAT MATTERS?

The first key consideration for a seismometer is the frequency response. Typically, a lower frequency response is better for natural seismicity / larger earthquakes, while higher frequency responses are required for induced seismicity / microearthquakes. The majority of the sondes that we manufacture are gimballed… Continue reading

A New Way of Connecting Remotely

Our standard method of establishing communications between a remote site and our servers has been to use a VPN-enabled modem. This has fitted in well with our goal of taking the “network into the field” (Having our network extended to remote sites has huge advantages… Continue reading

Piezometer Measurements: Accuracy and Meaning

A leading geotechnical instrumentation manufacturer claims that the accuracy of their piezometers is 0.1% full scale, i.e. 1-in-a-Thousand. Does it mean that if I install a piezo, I know to an accuracy of 0.1% what the pore water pressure of the ground is? How much… Continue reading

Comments on the Shape Accel Array

At first glance, the SAA is an excellent product: good accuracy and small internode spacings are real selling points. An issue with the SAA is that Measurand’s proprietary software is required to convert measurements into inclination/displacement. This has the following consequences: In an automated system,… Continue reading