Geophones Vs. Accelerometers

In the past, I have been under the impression that accelerometers were primarily used for the detection of stronger signals and therefore less sensitive than geophones. However, that was an OLD preception.

What is the modern sensitivity comparison of these devices?


Your perception remains valid.

You can think of them broadly in this way: Where the velocity sensor clips, the accelerometer sensor comes into play. Most inexpensive accelerometers (MEMs) only measure motion that humans can feel. The Shake’s MEMs has a considerable overlap with the geophone and can perceive motion humans cannot feel, though not by a lot.

You can see some graphs that show the relative sensitivities here:


Thank you, Braden. That is what I thought I had read years ago, but didn’t know about modern equipment.