Abstract

During the last decade the ability of large ring lasers to measure seismic induced ground rotation has demonstrated their potential for making contributions to the field of seismology. Unfortunately, ring lasers like many optical instruments tend to be expensive. In this technical note, we examine some design options for deploying a relatively low cost ring laser ground rotation sensor. A review of the design parameters, common to all active ring lasers, is followed by an examination of a specific relatively low cost approach currently employed in a ring laser that has been operating outside Conway, Arkansas. The article concludes with a discussion of some earthquakes detected by this instrument.

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