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I'm seeing some growth starting around Oct 7th, but unlike you, I'm seeing this both for US and other countries, though all coming from the same site, so a bit different situation.

SEOMoz does not have article writing software, however, they have a number of tools that can be helpful when writing an article. If you have a specific topic in mind, you can use tools available for keyword research, research on sites that you could link to, and people that you could email or talk to that might have interest in your topic, and therefore might link to your article.

There are also a number of blog entries on topics that are similar, or similar-but-different, such as creating and marketing with Infographics.

They have included two of the three words in your 'key phrase' in the following:

• URL
• H1 Heading
• Body
• Link
• Image

Those are all things that Google looks at when considering relevance.

Because they have a relatively small amount of text, keyword density will rank the key phrase fairly high.

SEOMoz does not have article writing software, however, they have a number of tools that can be helpful when writing an article. If you have a specific topic in mind, you can use tools available for keyword research, research on sites that you could link to, and people that you could email or talk to that might have interest in your topic, and therefore might link to your article.

There are also a number of blog entries on topics that are similar, or similar-but-different, such as creating and marketing with Infographics.

I'm seeing some growth starting around Oct 7th, but unlike you, I'm seeing this both for US and other countries, though all coming from the same site, so a bit different situation.