San Juan, Puerto Rico

IU SJG commences operations on: 1993,146

Host US Geological Survey
Network IU
Latitude 18.109
Longitude -66.15
Elevation 420
Datalogger Q330
Broadband STS-1VBB_w/E300
Accelerometer FBA_ES-T_EpiSensor_Accelerometer
Telemetry Status at the NEIC Pending


Site Photo Site Photo Site Photo


Station Heliplot


Station Latency


Past 30 Days

Station Availability - Past 30 Days

Past 365 Days

Station Availability - Past Year


Station Availability - Yearly

Vault Condition

The seismometer vault is built into a hillside and has an overburden of approximately 3 meters. Piers are isolated from floor and connected to bedrock. Temperature and humidity in the vault are stable. There is a four lane highway located 1100 feet from the vault. Traffic is heavy, and includes large trucks.

Site Geology

The vault is on interfingering lenticular units of volcanic breccia, conglomerate, sandstone and siltstone of cretaceous age. Seismometer piers are attached to decomposed rock of these materials.