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Puerto Rico Strong Motion Program (PRSMP)

The Puerto Rico Strong Motion Program (PRSMP) aims to monitor and understand seismic activity across Puerto Rico. Established in the 1970s and handed over to UPRM Civil Engineering in 1987, it operates a network of accelerometers to record earthquake motions from various locations, including critical infrastructure. With real-time communication capabilities, PRSMP provides timely information to emergency authorities and conducts research to mitigate seismic risks, thereby reducing fatalities and economic loss. Ongoing initiatives include collaborations with neighboring islands to expand monitoring efforts.

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Puerto Rico Strong Motion Program (PRSMP)

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  1. Puerto Rico Strong Motion Program (PRSMP) José Martínez-Cruzado John Clinton Georgia Cua

  2. History 1970’s : initial strong motion sensors located around islands 1987 : existing analogue infrastructure handed over to UPRM Civil Engineering Aims • Record motions on-scale from strongest earthquakes • Provide timely information after an event (location, magnitude, [PRSN authoritative] shaking intensity patterns, raw records) to public, emergency management authorities, scientists, engineers • Record motions from wide range of locations : isolated hard rock sites, representative soil sites in towns, critical infrastructure (tall buildings, bridges, dams), boreholes • Conduct research with goal of enhancing seismic understanding and damage mitigation • Reduce fatalities and economic loss resulting from earthquakes in Puerto Rico region Current Infrastructure • 20 standalone triaxial free-field/basement accelerometers (18-bit Kinemetrics ETNA) • 47 triaxial free-field/basement accelerometers w/ dial-up communications to UPRM (18-bit Kinemetrics ETNA) • 7 standalone multichannel accelerometers on structures (19-bit Kinemetrics K-2) • 8 free-field triaxial free-field accelerometers with real-time communications (18-bit Kinemetrics ETNA) • 8 free-field joint stations with PRSN (24-bit Kinemetrics EpiSensors) • ANTELOPE software acquires data, detects/associates/locates events, archives data

  3. PRSMP Station Map

  4. Typical Stations: Hatillo Fire Station - Dialup ETNA Minillas Building - 15 channel standalone K2 UPR Aguadilla - Continuous ETNA La Plata Dam 12 channel standalone K2

  5. Why Strong Motion alongside Broadband? Broadband sensors saturate at 1cm/s:

  6. Broadband sensors saturate at 1cm/s: Why Strong Motion alongside Broadband? For M8.3 Tokachi-Oki : all BB within 500km saturate, some up to 1000km (and sensors located in region of backwards directivity) Similar size event in North of PR (assuming similar event parameters, wave attentuation) : saturates all BB sensors in Dominican Republic, PR, some in Haiti, Jamaica, Cuba - no magnitude from local networks!

  7. PRSMP Initiatives - 1. Shakemap

  8. PRSMP Initiatives - 2. Real-time structural monitoring

  9. Dominican Republic PRSMP Initiatives - 3. New Installations on nearby islands with PRSN Samana Punta Cana

  10. PRSMP Initiatives - 3. New Installations on nearby islands with PRSN British Virgin Islands

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