While we know the locations of many large fault lines in New Zealand, there are many other faults buried underground that we don’t know about. But, a strong, damaging, earthquake can happen at any time, and can be followed by aftershocks that continue for a long time. Most are too weak, too deep, or too far offshore to be noticed. New Zealand lies on the boundary of the Pacific and Australian tectonic plates, so earthquakes happen here every day. Even aftershocks that are smaller in magnitude can cause stronger ground shaking, depending on their depth and location. While the number of aftershocks decreases over time, the magnitude of those aftershocks can be almost as high as the main earthquake. Aftershocks can happen minutes, days, weeks, months and even years after the main earthquake. Aftershocks are earthquakes that follow the main earthquake as the rocks readjust and the ground settles into position. Foreshocks are earthquakes that precede a larger earthquake. They scrape over, under or past each other.Įarthquakes may be a foreshock or may be followed by aftershocks. Tension builds along faults as tectonic plates. Faults are breaks that go deep within the Earth’s crust. Most (though not all) earthquakes start with this release of energy on faults. They are caused by a sudden release of energy. It will help speed up assessments of your claims.Įarthquakes are the shaking of the surface of the Earth.
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