Strain/inertial seismograph complexes

The purposes of this report are to present the results of a comprehensive review of the state-of-the-art of strain seismographs and their applications and to present the cost/performance tradeoffs between spatial arrays and strain/inertial arrays. The review included: strain seismometer operating characteristics, present designs, and possible future designs; installation methods, techniques, and configurations; applications of combined strain and inertial seismograms including detection thresholds of the prototype station; the character and magnitude of the strain noise field; and budgetary costs for typical installations.