Well, unfortunately earthquake predictions aren't a perfect science. It's a total guesstimate.
***Despite considerable research efforts by seismologists, scientifically reproducible predictions cannot yet be made to a specific day or month. However, for well-understood faults seismic hazard assessment maps can estimate the probability that an earthquake of a given size will affect a given location over a certain number of years. The overall ability to predict earthquakes either on an individual basis or on a statistical basis remains remote.***
I remember even with the recent Japanese quake, they only had about 1 minute of warning per my news channel. Yes, it's scary but that is how much is left up in the air until an actual quake strikes. =(
Unfortunately quakes are a part of living in California. I wish they didn't exist as they're a mighty monster to prepare for. GL to you and your sister.
at 8:54 PM on Mar. 19, 2011