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It's not normal at all. Something was building up
by yena 16y ago
It's not normal at all. Something was building up
- ars 16y agoFrom http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usc0001xgp/#summary http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usc0... "The March 11 earthquake was preceded by a series of large foreshocks over the previous two days, beginning on March 9th with an M 7.2 event approximately 40 km from the March 11 earthquake, and continuing with a further 3 earthquakes greater than M 6 on the same day."
- mkramlich 16y agoI strongly suspect it's related to the strange stories we've been hearing about a so-called Monster Island.
- wisty 16y agoI think it's the other way round. An 8.9 takes a long time to build up. When it's almost ready to pop, then a smaller earthquake can set it off.