below the surface, indicating they originated within the lowermost crust. Analysis of seismic waves suggest that the earthquake swarm was caused by brittle failure and fracturing of rock at depth from magma intrusion. No volcanic eruption was likely as the number and size of the tremors were too small. Although these volcano tectonic earthquakes were too small to be felt, they generated substantial local interest as they represented a significant concentration of seismic activity within the Anahim Volcanic Belt. See also List of volcanoes in Canada Volcanism of Western Canada References Volcanism of British Columbia Volcanic belts Hotspot volcanism Miocene volcanism Pliocene volcanism Pleistocene volcanism Holocene volcanism Neogene British Columbia Quaternary British Columbia Miocene North America Pliocene North America