It is too devastating to say or write anything about the earthquake now. If you are able to read Japanese and want to get the very latest news, it would probably be a good idea to check Japanese news sites. I often check http://www.asahi.com This is a good news site, but every single piece of information and picture there is just overwhelming.
I checked the site about a half hour ago and it reported that there was another explosion recognised in the nuclear power station in Fukushima a little after 6am this morning (Tuesday 15 March 2011). The working team apparently released radio-active steam from one of the reactors yesterday to prevent from the dangerous level of high heat inside the reactor. I do not know whether or not this release has properly worked.
I found another useful site in Japanese:
This site gives you all sorts of information related to the earthquake as well as the useful links.
A good news–Fukushima Daini (= the second) power station seems under control at the moment. [NB. "Daini" means 2nd and "daiichi" means 1st in Japanese.]