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Earthquake Thread ~ Always Updated*6.3 Japan*5.5 Nicaragua*5.4 Fiji*5.0 Balleny Islands*5.0 Taiwan ~ Pg 20424
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WhiteAngel |
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Does anyone know or remember how long a quake is considered an aftershock? I know a few years but I don't remember an official number.
Quoting: WhiteAngel I'm not sure there is an official number/answer. Some of the New Madrid Seismic Zone earthquakes are considered to be aftershocks from the 1811-1812 earthquakes. That one I knew. Crazy 100 years later but true. If the quake is from the same area as a large quake, they are aftershocks. The Tonga quakes made me think of that. Not building - aftershocks.From which big quake are you thinking? How long ago? There was an 8+ within the last few year - that one.
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