Processing

Uninterrupted routine seismological data processing by a decentralised group of trained individuals.

PROCESS SEISMIC DATA

Seismic data from more than 90 mines in 19 countries continuously stream into the IMS offices. A team of 80 data processors process approximately 30 000 seismic events 24 hours a day, 365 days a year. Results are returned to the mine typically within minutes of the event being recorded on the mine. The aim is to have all data processed and back to the mine within one hour of it being recorded. Large events receive the highest priority.

The processors are assisted in their tasks by travel-time plots and per-event Wadati plots. These check consistency of picks by checking on unusual source parameters popping up as messages on the screen to aid the processors while processing.

QUALITY CONTROL

Quality control of the seismic data is performed every working day on 10% of data. The events are selected for per-processor sessions. Large events and events that triggered the processor-assist automatic pop-ups are given preference. A random selection of rejected and accepted events fills the rest of the quality-controlled selection. These events are sent to a group of experienced processors for quality control. If such a selection of events fails, the whole batch of data that was processed by that processor is queued for reprocessing, and another quality control is selected once the data is reprocessed. This processed data is then used in the routine reporting and notifications sent out to customers.