Earthquake Safety Systems, Inc.
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A M6.7 earthquake struck the San Fernando Valley in Southern California on January 17, 1994.  The earthquake damaged residential and civil structures throughout the region.  Providence St. Joseph Medical Center (Burbank) installed an ESS MSC-U Master Seismic Controller in 1992.  The MSC-U seismic control unit automaticlly shutoff the large natural gas line feeding the hospital boilers.
Once facilities personnel had inspected the central boilers and associated piping, they were able to safely re-start the boilers.  

Northridge, CA M6.7 Earthquake