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Seismic Recorders
Click here for an introduciton to our digital seismic recorders

Seismic Recorders

Seismic Switches and Alarm Systems


  • NetDAS Operating System (brochure coming soon)
  • Brochures coming soon
Seismic Gas Shutoff Valves, Seismic Switches, & Valve Assemblies
CALIFORNIA (formerly known as KOSO) Seismic Gas Shutoff Valves Folletos en espanol para las válvulas antisísmicas CALIFORNIA

Specifications for CALIFORNIA Valves

Brochures for CALIFORNIA Valves

Partial lists of buildings using CALIFORNIA Valves

Specialty products

Certifications for CALIFORNIA Valves and Model 510 Seismic Switch


Flexible Pipe Loops

Nonstructural Seismic Mitigation
Instruments and Systems for Dam Monitoring and Structural Control
Papers and Reports

Links to Maps of Earthquakes in the US During the Past Week

Links to Other Earthquake Maps and Information
Links to Selected Organizations Involved in Earthquake Safety or Research