Cross-correlation detector


What is ccloc?

Detect earthquakes with weak signals

ccloc detects large but also very weak or distant earthquakes and other seismic events such as blast by matching waveform templates from known master events to real-time or archived data. The matching is done by cross-correlation of processed data. The data processing includes any filter available in SeisComP. Such filtered waveforms and even envelopes or STA/LTA traces can be used as characteristic functions. ccloc does not require discrete picks. Therefore, the sensitivity of a monitoring network can be increased and the magnitude threshold can be lowered.

Event type classification

As ccloc can remember the event type of the master events also the new detections may be classified and events of different type can be distinguished.

Brochure Documentation


Apply ccloc in a wide range of applications from monitoring micro-seismicity to discriminating nuclear explosions:

  • Monitoring of regions with high-rate natural seismicity, e.g. swarms
  • Monitoring of micro-seismicity
  • Monitoring of induced seismicity, e.g. at geothermal power plants, in mines or near oil and gas production wells
  • Monitoring of nuclear explosions
  • Discrimination of earthquakes from other seismic sources such as explosions.