I have not posted to this blog during the successive Christchurch earthquakes for the simple reason that the lessons from these events are still not clear. Some quick points are however useful to note:
* I think I ( and everyone else) have under-rated the importance of readily deployed water piping and pumping systems. The damage to water reticulation is without doubt the most lasting and difficult problem facing the city.
* Christchurch has been fortunate (to date) that the earthquakes have struck during mild weather. The need for shelter and fuel during this rescue effort has been reduced. This has also avoided the danger of fire, as the city as a great many wood burners.
* The continuous nature of seismic disturbance is not something I had incorporated into my thinking. I pray these things do not come in threes.