Broadband sensors

Broadband (or BB) sensors are especially sensitive to low frequency energy, and are broadly defined as any instrument capable of reliably recording wave periods greater or equal to 10 seconds. However they are also well-suited for measuring high frequency energy as well, limited only by the Nyquist frequency of the data logger's sampling rate.

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Short period sensors (corner period < 10 second)

Short period (SP) sensors have limited sensitivity to longer periods, but are otherwise perfectly suitable for earthquake or other high frequency analysis. They are generally defined as any instrument that begins to lose sensitivity at periods larger that 10 seconds.

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Channel and Instrument conventions

We follow FDSN guidelines for sensor channel and type naming conventions, outlined at SAGE / IRIS

Figure 1: Trillium Compact 120s

Figure 2: Lennartz 3D_lite MKII