Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of China-based solar energy specialist JinkoSolar Holding (NYSE: JKS) spiked briefly to a 12.6% post-weekend gain this morning on moderately heavy trading.

So what: The brutal earthquake in Japan caused partial meltdowns in two nuclear reactors, sending investors today to the safe cover of green and non-threatening solar stocks. Trina Solar (NYSE: TSL) jumped 11.2%, Yingli Green Energy Holding (NYSE: YGE) gained as much as 9.9%, and Japanese industrial giant Hitachi (NYSE: HIT), which builds nuclear reactors among many other things, took a 17.1% haircut today.

Now what: This reaction to the Japanese calamity probably won't last, if you ask me. Partial meltdowns may sound scary, but chances are that the Fukushima reactors will make it through this ordeal only partially damaged, ready for production again in a matter of months. That would be a serious vote of confidence for the safety of nuclear energy in general, given that the reactors were only built to withstand a calamity one-fifth the power of this quake. Tread lightly in solar territory today, but give unfairly punished Hitachi a second look.

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Fool contributor Anders Bylund holds no position in any of the companies discussed here. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool is investors writing for investors.