4.4 La Verne Quake – Hundreds of QuakeAlert Users Were Warned

For the La Verne earthquake on August 28, 2018 Early Warning Labs had many users beta testing our QuakeAlert Mobile App.

We ran the numbers and the system worked as designed with alerts going out to:

373 users over intensity 2.  Avg warning time: 10.5 seconds

80 users over intensity 3. Avg warning time: 5 seconds

Intensity 3 definition per the USGS:

III. Felt quite noticeably by persons indoors, especially on upper floors of buildings. Many people do not recognize it as an earthquake. Standing motor cars may rock slightly. Vibrations similar to the passing of a truck.

Anyone feel that earthquake? Got the alert but this time only had 12 seconds! pic.twitter.com/7J21oPhXhA

— Alissa Walker (@awalkerinLA) August 29, 2018

We are working with the USGS to test and approve a wider release.  Sign up for our email list to be notified first!

LA Times Article: http://www.latimes.com/local/lanow/la-me-quake-early-warning-20180829-story.html

Earthquake details via the USGS: https://earthquake.usgs.gov/earthquakes/eventpage/ci38038071#executive