Odds of the Christchurch and Japan Eathquakes happening so close together?


I’m just curious as to the odds of the Christchurch earthquake and the Japanese earthquake occuring in such a short time between each other. In such cases as these some might say that it is hardly worth comparing as the damage caused by each is on a completely differernt scale to the other.

For a good summary of why earthquakes happen where they happen and in particular reference to the Christchurch earthquake please click on the link above.

Dr Gibson, an expert in the field of earthquakes suggests that the reason why the Christchurch earthquake was more effective and sereve the second time round all has to do with the epicentre. He explains that the Christchurch earthquake epicentre was only fairly shallow and located directly under the city. This had a significant impact as the quake zone was expanded to 10 – 20kms out from the epicentre, which includes most of the city. Gibson also suggests that because it was only a shallow epicentre the magintude of the quake was lessened.

The Japan earthquake on the other hand, was on a completely different playing field.  The epicentre was almost 129 kilometres out from the Japanese coastline, near Sendai and about 32 kilometres deep into the earths ocean bed. This, by using Gibsons theory means that because the epicentre is deeper then the earthquakes magintude would be alot higher. And as we have wittnessed, by reaching an 8.9 magintude on the richter scale. This means that if the epicentre had been closer to Japan then the effects of the earthquake might have been alot more intense.

One last thing before I wrap this weeks blog up is that if I could direct you to this website. It tells of how a youtube video predicts both the Christchurch and the Japan earthquakes.

Perhaps I should also mention that there has been alot of talk about how Japan could withstand the earthquake but it was the tsunami that really shook the entire country. I give credit to the japanese in how they have been handling the situation and also to all those pitching in and donating both money and there time to help those in need. A good example of this can be found here.

Although for this Online News unit this week we are suppose to embed a map into our blog I just wanted to add in one that the ABC have already done as it helps explain the disaster zones in Japan.

However here is my attempt at embedding  google map created by me.

Overview of both Japan and New Zealands location.

Till next week guys, stay cool 🙂


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