Cascadia subduction zone

the Moment Magnitude Scale. Then along the Cascadia Subduction Zone an earthquake of magnitude 7.8 occurred but the pressure built up under the sister faults, was partly released by the San Andreas major eruption. An aftershock has never been recorded to exceed a maximum magnitude of 1Mw less than the first major tremor. In a period of 15 days, two more tremors of magnitude higher than a magnitude of 7 on Moment Magnitude Scale were felt along the Cascadia Volcanic Arc, a tail of Pacific Ring of…