This morning’s after-shock was an unpleasant surprise for Christchurch people. They thought the after-shocks were starting to decrease in size and frequency. Instead, just before 8am, there was a 5.1 shake. It was very near the city – Heathcote Valley – and very shallow, only 6km deep, and this is the reason it was quite a strong shake.

Unfortunately, it has done more damage. Some buildings which had no damage from Saturday’s quake, were damaged this morning. Some buildings that were already damaged, received more damage. Plumbers trying to mend broken water and sewer pipes found that this morning’s after-shock broke more pipes.

Schools will stay closed until Monday. The university had more damage today and it is possible that the main library will not open again this semester. University classes will not start again until 20th September.

However, the good news is that Christchurch water is now safe to drink. They no longer have to boil the water.

Many people are feeling under stress because of the after-shocks and the worry that there could be another big earthquake. Of course, nobody knows. Civil Defence people tell us the safest thing to do in an earthquake is to get under a table, away from a window. If you are outside, stay away from brick walls, chimneys or windows.