Mid-ocean ridges exhibit active volcanism and seismicity. Such volcanic tectonic seismicity is often a precursor of an upcoming eruption. Hydraulic fracturing has been sometimes linked to induced seismicity or earthquakes. Reservoir-induced seismic events can be relatively large compared to other forms of induced seismicity. Along the subducting plate seismicity is more variable, especially intermediate-depth earthquakes. From February 2010 through April 2010 seismicity decreased, although the maximum amplitude of earthquakes increased. Used in conjunction with monitoring data on seismicity and deformation, correlative monitoring gains great efficiency. Other volcanoes in the with recorded seismicity include Mount Garibaldi, Mount Cayley massif and . Most induced seismicity is of a low magnitude. However, episodes of induced seismicity occurred during the initial fill of reservoirs. Wastewater injection has been linked to induced seismicity. Another danger related to carbon sequestration is induced seismicity. To mitigate the possible consequences of induced seismicity, hazard and risk assessment is essential. Induced seismicity in Basel led to suspension of its HDR project. The mass of water gave rise to induced seismicity.