I would say "not necessarily"; but, it definitely doesn't have _positive_ connotations...
One might think of it as `<= 0`.
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**Update**
Hmm, evidence? Well, the word "earthquake" is definitely not a positive word by itself, right? It has more neutral or negative connotations (i.e.,`<= 0`). But, I don't know how to provide evidence of that...
There is a word, (access tsunami), which is when there are a lot of site views/accesses in a short period. When used in this sense, I guess the blog owner would be happy :)
At any rate, I don't think you'll realistically be offending many people by using "tsunami" (unless your project is destructive, obviously).
By the way, what will your project be doing?