Notifies user when the IRF Kiruna magnetogram readings indicate that nice auroras have been appearing.

Latest Version

Version
1.3.1
Update
March 26, 2018
Size
165KiB
Developer
Category
Users
12
Rating
1 ★
Manifest Version
2
Web Store Status
Languages Support
English
See more
Permissions
Http://www2.irf.se/
Notifications
Storage
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IRF Kiruna Aurora Alert Extension

# Kiruna Aurora Alert Chrome Extension

## What is this?
This Chrome extension notifies users when IRF Kiruna's magnetogram readings indicate that nice auroras have recently appeared.

## How does it work?
It calculates the linear regression of the magnetogram readings taken during in the past 30 minutes. The resulting slope value is indicated in the extension's icon badge.

## How do I interpret the slope value?
If the slope value is positive then the magnetogram readings have been trending upwards in the last 30 minutes. The badge background color corresponds to the K index. Furthemore, a notification is given when readings pass the threshold of 52,000 nT for the Z component, 100 nT for the Y component, and 10,500 nT for the Y component. These are pretty large thresholds as this Chrome Extension is designed to notify the user of significant aurora events that recently occured rather than minor ones. The threshold values were chosen based on empirical observations.

## What are X, Y, Z components?
A magnetic field consists of three components, namely X, Y, and Z. These components describe a point in a three-dimensional space where the X-axis is in the geographic north-south direction, the Y-axis in the geographical west-eastern direction and the Z-axis in up -then direction perpendicular to the X and Y axis If you assume the origin of this coordinate system, the vector describes from the origin to a point (X, Y, Z) the direction as well as the strength on the magnetic field ([source](http://www2.irf.se/maggraphs/mag3d/)).

## Where does the data come from?
IRF Kiruna's magnetogram data is polled every minute from here:
http://www2.irf.se/maggraphs/rt_iaga_last_hour.txt

K index for the pats 15 minutes is available here:
http://www2.irf.se/maggraphs/preliminary_real_time_k_index_15_minutes

Follow the geomagnetic development in real time:
http://www2.irf.se/Observatory/?link[Magnetometers]=Data

Check out this experimental 3D magnetogram:
http://www2.irf.se/maggraphs/mag3d/

More data in IRF's website:
http://www2.irf.se/Data/?chosen=data
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 2, "name": "IRF Kiruna Aurora Alert", "description": "Notifies user when the IRF Kiruna magnetogram readings indicate that nice auroras have been appearing.", "version": "1.3.1", "icons": { "16": "icons/icon-16.png", "48": "icons/icon-48.png", "128": "icons/icon-128.png" }, "background": { "scripts": [ "js/jquery-3.3.1.min.js", "js/simple-statistics.min.js", "js/popup.js", "background.js"] }, "permissions": [ "http://www2.irf.se/", "notifications", "storage"], "browser_action": { "default_icon": "icons/icon-48.png", "default_popup": "popup.html" }}
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How to download and manually install IRF Kiruna Aurora Alert extension for Chrome

Looking for a way to install IRF Kiruna Aurora Alert extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install IRF Kiruna Aurora Alert extensions manually, this article outlines two simple methods to effortlessly install IRF Kiruna Aurora Alert extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download IRF Kiruna Aurora Alert extension and manually install through Drag &Drop

If you ever need to manually install a IRF Kiruna Aurora Alert extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the IRF Kiruna Aurora Alert Extension by clicking the "Download CRX" button on the website.

Look for the IRF Kiruna Aurora Alert extension you wish to install. Go to the website and download the IRF Kiruna Aurora Alert extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for IRF Kiruna Aurora Alert extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the IRF Kiruna Aurora Alert extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download IRF Kiruna Aurora Alert extension for Chrome and install in Developer Mode

This is another method to install IRF Kiruna Aurora Alert extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the IRF Kiruna Aurora Alert extension file

Select and download the IRF Kiruna Aurora Alert extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the IRF Kiruna Aurora Alert extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your IRF Kiruna Aurora Alert extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the IRF Kiruna Aurora Alert extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install IRF Kiruna Aurora Alert extension in 2 ways. We hope this guide proves helpful.

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