The "people reached" is calculated as sum of views of non-deleted questions-threads to which you contributed a 'significant' post, where significant means (I think this is still current We're working on a new stat to help convey the reach of your posts here ):
asked the question
gave a 'significant' answer, meaning that it has a positive score (...
I think this might be an issue with Gravatar and not Stack Exchange. I'll explain my reason for thinking this later in this answer.
First off, there is possibly a way to get your old gravatar back, adapted from Caleb's answer on Meta Stack Exchange:
Go to the Wayback Machine.
Enter the URL for your profile page. If you're lucky, it's been archived there. ...
You can find several places where this is discussed. The main announcement is Some changes to the profile while we make it responsive (on Meta Stack Exchange). Specifically,
John Omielan's answer is about this issue and contains links to some other places where it was raised/discussed. Also if you browse the linked questions, you can find other related posts ...
As @ArcticChar notes in the comments, it's under the profile button/dropdown:
This is a recent change: We’ve shipped some changes to the user profile navigation and this feature isn't even properly mentioned, but the responsible developer commented about it here:
Oooh, sorry it's not in the demo @Glorfindel. It shows you your Teams profiles, network ...
The Community user is mostly a token in a data base.
The edits done by the community user are for the most part suggested edits that were proposed and approved by users. In rare cases SE starts some automated mass edit and that is also attributed to this user.
Other than that actions by deleted user accounts get transferred to Community user. It is also ...
You got a recent vote on a CW answer to a very popular question, which brought your answer to a +5 score. This makes all the views on the question eligible for the impact counter.
Which is why you have such impact. If someone downvotes that answer, the number will drop by a few hundred thousands.
See also: Massive change in 'People Reached' ...
A brief answer is that you should go to your profile and click on the number of consecutive days. (Remember that you'll find this in the profile tab, not in the activity tab.)
You can find more details here:
Statistics of visits on M.SE
Implementation date for the consecutive days calendar
How can I see which days I visited site?
The tag-info for the ...
Thanks for the report!
As I mentioned in the comments, this was a side-effect of upgrading to MathJax 2.7.5. The core of the issue is described in detail over on GitHub.
Many thanks to Davide Cervone for pointing me in the right direction and suggesting a fix. It's deployed in production now. Please let me know if you see any other oddities.
The following old bug report on Meta SE seems to be identical to what you observed: Activity log entry before registration date.
Though that report is marked status-completed, it seems that there is a regression of this bug on at least two other SE sites:
Anime & Manga SE: According to the activity tab of my profile, I performed some actions on a site ...
is there a way to flag a user profile directly?
There isn't, only posts and comments can be flagged.
If not, what should one do instead?
Besides using the contact link, you can also flag one of your posts and explain the situation (include a link to the problematic profile). This may, especially on weekends, lead to a faster reaction than the contact ...
The information labeled private in your profile (including your email address) is visible only to you, to the moderators (those with a diamond sign), and some of SE employees (namely, those with a diamond on Math site).
You can check this yourself by viewing your profile from another browser or computer on which you are not logged in to SE (or from ...
Some of the new styles on the page caused the rendered MathJax to be rendered in the incorrect position (and also hid it).
You could see that as a flicker of the page, seeing the rendered MathJax (in the wrong position), which then suddenly disappeared.
I also added the missing re-rendering when changing the sorting & filtering.
You are right, this is part of some recent network-wide changes to the profile: Now live: A fully responsive profile. Some of the reasons for the changes are in other posts on Meta Stack Exchange, e.g. Some changes to the profile while we make it responsive.
The top network posts were listed in the previous version of the profile as well, but right under the ...
The use-case seems marginal to me, so I do not see a need to have it on the profile, but if you want to know just use search: "user:me wiki:yes" will return all your CW posts; you can further refine the query in various ways.
Side note in view of comments: you would also note major amounts of up-votes arriving via badges.
When you click your own profile, the default tab is the activity tab. You should go to the "Profile" tab, where you can see the "visited $x$ days, $y$ consecutive" text. Click this text to show the calendar.
This statistic appears to be programmed to display the highest rank available between weekly, monthly, quarterly, yearly and all-time (with a bias towards the longer-term in case of ties). You can check by clicking on the profiles of the leaders on the reputation leagues.
Coincidentally, we had a similar question earlier this month on Meta Stack Exchange: Why is the 'Next badge', Curious, the same as the Newest badge in this profile?. I can repeat my answer verbatim:
That's status-bydesign. This is how that widget looks for the owner (except that this is a different badge):
Until they've made a choice for which badge ...