- © 1996 by the Seismological Society of America
On January 11, 1996 an extremely unusual recording was made by the Geological Survey of Canada's seismograph network. We have identified the source, and, to our knowledge, this is the first recording of its type. The purpose of this short note is to document this extremely rare seismogram.
On January 11, 1996 at approximately 3:45 pm local time (23:45 UT), the emergent onset of a significant seismic event was noticed at the station ALB of the Western Canadian Telemetered Network (WCTN). This seismic station, operated by the Geological Survey of Canada, is located on central Vancouver Island, above the Cascadia subduction zone. It consists of a short-period vertical seismometer buried in a concrete vault, in a quiet wooded setting (Figure la). The instrumentation is not far from a local school on the outskirts of Port Alberni, British Columbia. The digital seismic signals are telemetered to the Pacific Geoscience Centre...