Dec 8, 2017

Live Earthquakes App

It's awesome when you are asked to build a product demo and you end up building something you actually use yourself.

That is what happened to me with the Live Earthquake Shiny App.  A few months ago, as part of the JHU Data Science Specialization course, I was tasked to build a data product demo using the shiny package in R. I'd already had some experience with shiny, but this time I wanted to build an app showing real-time data. Something people would like to monitor regularly and see if something special happened during the last couple of days.

I am not at all an expert on earthquakes, but I thought this would make a great use case for a real-time data visualization. And now, every time I hear from the news of a new earthquake episode I go to double check it in my app and see what else is going on.

The app does the following:

  • Retrieve the latest version of data available from USGS website. Data comes in a .csv file and reports quakes for the past 7 days (check the exact URL in the R code).
  • Subset the dataset in case the user chooses to see only data from yesterday.
  • Plot earthquake data on a world map using the leaflet library.
  • Calculate a few basic metrics like max and number of occurrences.
  • Force a manual refresh of data if the user press the button “Update Data”.
Here is a snapshot of the app. You can use the app here in shinyapps.io server.

live earthquakes map


Also you check out the code here.

If you click on each circle some basic info about the quake are shown: place, time, magnitude and depth. Circles colors are based on the magnitude (the darker the stronger). If you wonder how I classified them from minor to strong below is the scale I used:

magnitude categorization

Hope you'll have a chance to explore it! Enjoy.

10 comments:

  1. Great beat ! I wish to apprentice while you amend your site, how can i subscribe for a blog site? The account helped me a acceptable deal. I had been a little bit acquainted of this your broadcast offered bright clear idea reputation management online services

    ReplyDelete
  2. I'm really enjoying the theme/design of your blog. Do you ever run into any web browser compatibility issues? A few of my blog readers have complained about my site not operating correctly in Explorer but looks great in Chrome. Do you have any suggestions to help fix this issue? search engine marketing solutions

    ReplyDelete
  3. Hmm it looks like your website ate my first comment (it was extremely long) so I guess I'll just sum it up what I wrote and say, I'm thoroughly enjoying your blog. I too am an aspiring blog writer but I'm still new to the whole thing. Do you have any tips for beginner blog writers? I'd definitely appreciate it. truck rental singapore

    ReplyDelete
  4. Good day! This is my first comment here so I just wanted to give a quick shout out and say I truly enjoy reading through your blog posts. Can you recommend any other blogs/websites/forums that go over the same topics? Thanks a ton! internet marketing

    ReplyDelete
  5. I'm curious to find out what blog system you're working with? I'm having some small security issues with my latest blog and I would like to find something more safeguarded. Do you have any recommendations?
    conference organiser in singapore

    ReplyDelete
  6. Please let me know if you're looking for a author for your weblog. You have some really good posts and I think I would be a good asset. If you ever want to take some of the load off, I'd absolutely love to write some content for your blog in exchange for a link back to mine. Please send me an email if interested. Many thanks! Surface Protection Film

    ReplyDelete
  7. Thank you for some other informative website. Where else may I am getting that kind of information written in such an ideal way? I've a undertaking that I am simply now working on, and I have been at the glance out for such information. website maintenance

    ReplyDelete
  8. Hello! This is my first comment here so I just wanted to give a quick shout out and say I really enjoy reading through your blog posts. Can you recommend any other blogs/websites/forums that go over the same subjects? Thanks a lot! SEO package

    ReplyDelete
  9. Hey would you mind letting me know which hosting company you're using? I've loaded your blog in 3 different browsers and I must say this blog loads a lot quicker then most. Can you suggest a good hosting provider at a reasonable price? Cheers, I appreciate it!
    near me keywords

    ReplyDelete
  10. Greetings from Florida! I'm bored at work so I decided to check out your website on my iphone during lunch break. I enjoy the info you present here and can't wait to take a look when I get home. I'm shocked at how fast your blog loaded on my phone .. I'm not even using WIFI, just 3G .. Anyhow, superb site!
    marketing companies Singapore

    ReplyDelete