Resources

  • In response to induced seismicity observed in western Canada, existing public networks have been densified and a number of private networks have been deployed to closely monitor induced earthquakes associated with oil and gas operations in the region. Over the past three years, we generated an…
  • Geophysicists depend on seismometers to monitor earthquakes generated by the motion of the tectonic plates that form the Earth’s crust. In order to function, the instruments need to be leveled prior to operation. That’s easy enough for a device deployed on dry land, but when it comes to…
  • The first modern broadband seismometer to be based on a Galperin configuration was the Streckeisen STS-2, an observatory-grade vault instrument introduced in 1990. Nanometrics introduced a symmetric triaxial seismometer with a 240 s lower corner period, the Trillium 240, in 2004. There are now a…
  • In this entry the principles of operation of broadband seismometers are discussed and contrasted with those of passive seismometers. The criteria for selecting a seismometer are discussed. Particular attention is paid to noise-generating mechanisms, including self-noise generated within the sensor…
  • This entry reviews the topic of downhole seismometers. The entry is split into three sections. The first section reviews the different types of downhole seismometers. The second section provides an overview of seismic noise sources and their impact on downhole installations. The last section…