site disappeared Overnight wrt Rankings in Google

[onlinedownloads]

Till August 13th, i did had a decent SERP in Google, but the next day morning all of the sites disappeared from the top places. No where in the top 20. The Keyword which has very low competition was in the 1st position earlier. But today, even that disappeared from the rankings. Even the blog results disappeared overnight. What could be the reason?

Does the web hosting has any role in this? Say if the google crawls the site when the sever was down for maintenance reasons, will it cause this sort of adverse effect?

That was the issue when Google Webmaster tool reported that the site has been crawled on Aug8. But today when i checked out the same, the last crawled date was on Aug13. Interestingly from Aug13th onwards, I'm facing this problem.

Last week may be on Aug6th or so ... i've changed the images in my site to surveyscout-paid-online-surveys-graphic.jpg from surveyscout.jpg

Is this anything to do with the fall of SERP? Except this change i've nothing added or deleted.

Please help me in this regard. Thanx in advance.

[BoogalooDude]

Does the web hosting has any role in this? Say if the google crawls the site when the sever was down for maintenance reasons, will it cause this sort of adverse effect?

No, won't have anything to do with it. Your pages should still be indexed, just not the most recent versions maybe.

Are you saying that none of the site pages are indexed now?

[Rephrase]

Have you been doing any black SEO techniques?

[nat6477]

Hi

Google are know for changing their algorythm which could be the cause of your site being lower down on the PR. Usually it returns within a month or so.

[onlinedownloads]

The site is indexed. I'm not doing any blackhat SEO.

Updating on my SERP problem....

On Sep 2nd I noticed that my site got its place back into the Google...this time on 2nd page. But sometimes I see there...the other times...it's again off...no where again. Immediately on the next day Sep3rd the site again vanished. May be something like DANCING. So presently what i could do is...leave that for sometime.

Most of the members feel that I should add the content to the site. But in my website I review the products ... so addition of the content on regular basis is not possible. Only possibility is that the content can be modified.

So keeping in mind, I've started a BLOG at my site with something like http://www.example.com/blog . I used to post articles in the BLOG. Even that got good SERP. But last week, I've started a new blog (http://www.someXYZ.com) thinking that a new domain will be fresh and seperate.

So the present problem is should i consider updating the old blog which has url extension ....or should I go with a brand new domain.

Please do suggest me the BEST option.